Home page of the microscope service parts, repair and spare parts online catalog - Sermik-Oplatek Mikroskopservice Dresden f.n.n.Z

Description of this part for the microscope.

called thick objectives
Thread in the cap: no, the cap of this case has no RMS thread for screwing the objective in

Various names are used on the secondary market for a microscope objective case, including:
- objective case
- microscope objective case
- objective container
- microscope objective container
- objective storage case
- objective storage container
- objective box
- objective storage box
- protective objective case
- objective lens case
- objective lens container
- dust protection case
- transport case for microscope objectives
- microscope objective holder case
- storage canister for microscope objectives

This case is of most value to users and collectors who own LOMO objectives, but you can of course keep objectives from any manufacturer in it, for example Carl Zeiss Jena.

Description of this part for the microscope.

These eyepieces fit stereo microscopes of any manufacturer, provided they use eyepieces with a 34 mm mounting diameter, for example:
- PZO MST-1 / MST-2
- PZO MST-130 / MST-131 / MST-132
- PZO MST ZOOM
- PZO KLP-21 / KLP-22 colposcopes
- DIY devices (for example instruments for the artificial insemination of queen bees) built around PZO MST stereo microscopes
- Meopta DM23
- Carl Zeiss Jena SM-XX (the so-called SM-20)
- medical microscopes by Carl Zeiss Jena (for example ophthalmic slit lamps) built around SM-XX stereo microscopes

These eyepieces do not fit microscopes whose eyepiece diameter is other than 34 mm:
- they do not fit the PZO MST-110 / MST-127 stereo microscopes, because those use eyepieces with a 23.2 mm diameter
- they do not fit the Lomo MBC-1 / MBC-2 stereo microscopes, because those use eyepieces with a 30 mm diameter
- they do not fit the Lomo MBC-9 / MBC-10 stereo microscopes, because those use eyepieces with a 32 mm diameter
- they do not fit the Carl Zeiss Jena Technival / Citoval stereo microscopes, because those use eyepieces with a 23.2 mm diameter
- they do not fit the Carl Zeiss West Germany stereo microscopes, because those use eyepieces with a 30 mm diameter
- they do not fit the Euromex E series and Z series stereo microscopes, because those use eyepieces with a 30.5 mm diameter
- they do not fit the Hertel & Reuss STE series stereo microscopes, because those use eyepieces with a 31 mm diameter

PZO 10x/25 eyepieces reach very high prices on the second-hand market. If you own a PZO MST-130 stereo microscope or a compatible one without eyepieces and you need any pair of eyepieces at all to get the microscope working - then the following PZO eyepieces with a 34 mm mounting diameter are commonly available on the market:
- PZO 6.3x
- PZO 12x (also in a version with a linear or grid reticle)
- PZO WF 20x
- PZO 25x

Description of this part for the microscope.

5
Magnification: 5x
Field number F.N.: 25
Mounting diameter: 23.2 mm

Please note: PLI is a series of projection eyepieces assigned to the CFI60 system (optics corrected for infinity / "I" as in "infinity"). I have, however, personally seen eyepieces from this series used on microscopes with optics corrected for a finite tube length (160 mm, to be precise).

This eyepiece contains no chromatic correction lenses, so that correction has to be built into the objective (in the case of Nikon objectives these are the CF / CFN / CFI series).

The standard 23.2 mm mounting diameter allows it to be used in the projection tubes of many microscopes from various manufacturers - both biological and stereo ones. It therefore has to be regarded as a very universal projection eyepiece. In the "compatibility" section I list only a small part of the microscopes this photo eyepiece can be used with.

From the experience of people I know, only testing a projection eyepiece yourself on a specific microscope setup gives you certainty about how it will behave.

With every configuration - different objectives, a different tube length, a different photo adapter, camera, DSLR, sensor size - the user will get a different result.

This applies to tests both on microscopes with finite tube length optics (for example the Nikon Alphaphot with 160 mm optics) and infinity optics (for example the Nikon Eclipse TS-100 infinity), and both on older stereo microscopes (for example the Nikon SMZ-2T) and somewhat newer ones such as the Nikon SMZ-18.

Description of this part for the microscope.

5x
Magnification: 2.5x
Mounting diameter: 23.2 mm

Please note: this is a "CF" projection photo eyepiece, meaning "Chrome Free" (chromatic aberration free). The eyepiece itself carries no chromatic correction - for correct results it has to sit in the microscope objective. In the case of Nikon, those are the CF (CFN) and CFI objectives.

The standard 23.2 mm mounting diameter allows it to be used in the projection tubes of many microscopes from various manufacturers - both biological and stereo ones.

It has to be said that this is a very universal projection eyepiece. In the "compatibility" section I list only a small part of the microscopes this photo eyepiece can be used with.

From the experience of people I know, only testing a projection eyepiece yourself on a specific microscope setup gives you certainty about how it will behave.

With every configuration - different objectives, a different tube length, a different photo adapter, camera, DSLR, sensor size - the user will get a different result.

This applies to tests both on microscopes with finite tube length optics (for example the Nikon Labophot with 160 mm optics) and infinity optics (for example the Nikon Eclipse E600 infinity), and both on older stereo microscopes (for example the Nikon SMZ-10) and somewhat newer ones such as the Nikon SMZ-1500.

Description of this part for the microscope.

microscopes, a so-called "objective pair"
Magnification: 2.5x
Anti-reflective coating: yes, this is an objective carrying the red letter "T", i.e. T-coated

On the black plastic housing the magnification is written as "2,5" - unlike the older versions of such objectives (made for the Stereomikroskop XII model), where the format used was "2 1/2" (see here: https://www.microscopeparts.eu/part/91035)

In stereo microscopes built on the Greenough principle, what is called "the microscope objective" is in fact a pair (two pieces) of objectives set at a specific angle to each other. This is exactly why the housings of older examples of such objectives (more precisely: the common housing covering the pair of objectives) carried two serial numbers. Each of these objectives simply had its own individual serial number. Such a case can be seen on this 1.25x objective: https://www.microscopeparts.eu/part/00654.

This technical design has a very interesting consequence - each single objective, once taken out of the housing, becomes an interesting choice for anyone working in macro photography, all the more so because these are usually low-magnification objectives, which are exactly what macro photography looks for.

Since the 1930s Carl Zeiss Jena has produced many models and variants of stereo microscopes, and this objective will fit the vast majority of them, because the way they are mounted is the same throughout.

Several names are in use on the market for the stereo microscope this objective comes from:
- Carl Zeiss Jena Stereomikroskop XVI
- Carl Zeiss Jena Präpariermikroskop XVI
- Carl Zeiss Jena Stereomikroskop PM XVI
- Carl Zeiss Jena SM XVI
- Carl Zeiss Jena PM XVI

Sometimes, to avoid Roman numerals, you also come across the spellings "SM-16" and "PM-16".

Interestingly, in the instruction manual from 1954 available online (https://www.microscopemuseum.eu/catalogues/Carl_Zeiss_1954_Stereomikroskop_PM_XVI.pdf), the header on page 3 reads "Stereomikroskop PH XVI". I do not know whether this is an OCR error or an original misprint, but it means that this (incorrect) name may be in circulation as well - and all of the names listed above refer to one and the same microscope.

Description of this part for the microscope.

following microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

Each of these discs has 5 seats that take filters of 32 mm diameter. The filters are locked in place by a springy retaining ring (a so-called Sprengring) so that they cannot fall out. The set offered here comes with 10 such rings. Since each wheel can be loaded with five filters, the total number of possible combinations is 25.

At the moment these filter seats are empty. Neither wheel has any filters fitted - you are free to load them with whatever filters you like.

This two-wheel module fits halogen, HBO and XBO lamphouses.

Parts made by Carl Zeiss Jena, cast or injection moulded from ZnAl alloy, carry their own numbers by which they can be identified. This double filter revolver module consists of 3 cast components:
- 2672 Si10 CZ - the frame carrying both wheels. It is at the same time the outer cover plate with which the whole module is screwed onto the lamphouse
- 2957 Si10 CZ - the thick filter wheel
- and note: the thin filter wheel also carries the number 2957 Si10 CZ, which is unusual for this manufacturer - that two parts differing in dimensions should share the same number

This double filter wheel is sometimes also called:
- double filter holder
- double filter turret
- dual filter carrier
- double filter slider
- double filter changer

Here https://www.microscopeparts.eu/part/99693 you can see what a complete 6V 25W halogen illuminator looks like with a single filter wheel fitted. The double set offered here fits such an illuminator among others, so the single filter wheel from the illuminator of a Carl Zeiss Jena Jenaval microscope can, for example, be replaced by the double one.

Description of this part for the microscope.

Carl Zeiss Jena NU microscope (this socket carries the number 44 in the instruction manual). It measures the brightness of the image, from which the exposure time for photographs is determined.

The instruction manual for the Carl Zeiss Jena NU microscope is made available by the excellent site mikroskop-online.de here: https://www.mikroskop-online.de/mikroskope/wp-content/uploads/simple-file-list/Mikroskop-Bedienanleitungen-Druckschriften-Carl-Zeiss-Jena-Mikroskopen/30-040-1_G-Grosses-Universal-Forschungsmikroskop-NU-T.pdf

Description of this part for the microscope.

filter:
Manufacturer: Carl Zeiss Jena
Model: U204g
Filter type: glass excitation filter for UV fluorescence (the manufacturer calls it Erregerfilter)
Glass type: UG 1
Diameter: 32 mm
Thickness: 2 mm
Colour: black-violet, passes very little visible light
Toughened version: yes

The g at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature. With a UV excitation filter this matters especially, because it sits at the hottest point of the whole path and absorbs most of the burner energy.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

The manufacturer catalogue gives the following transmission values for this glass at 2 mm thickness:
- 0.015 at 302 nm
- 0.093 at 312 nm
- 0.435 at 334 nm
- 0.644 at 366 nm

Across the whole visible range, from 405 to 644 nm, transmission is zero. This means the filter works almost entirely on the 366 nm mercury line, exactly where the HBO burner is strongest in the ultraviolet.

One property of this glass is worth knowing: above 700 nm it starts to transmit again, and at 750 nm transmission reaches 0.210. This infrared leak is invisible to the eye, but it heats the specimen and spoils contrast in photographs.

In the excitation path U204 is also combined with a red-absorbing filter. The manufacturer documentation shows such a pair with the B226 filter, which cleans up the excitation band further.

The same UG 1 glass was supplied in two thicknesses, each with its own designation:
- The Carl Zeiss Jena U204 filter is UG 1 glass 2 mm thick
- The Carl Zeiss Jena U205 filter is UG 1 glass 4 mm thick

The thicker U205 cuts more sharply, but passes about a third less energy on the 366 nm line, so the image is noticeably darker.

A safety note: this filter passes ultraviolet, which is invisible and harmful to the eyes. When working with it, never look into the illumination path without a barrier filter in place.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B229g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The "g" at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red that filter passes and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B228g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The "g" at the end of the designation stands for the German gehärtet, meaning toughened. The manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red that filter passes and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: B226g
Filter type: red-absorbing glass filter (the manufacturer calls it Rotsperrfilter)
Diameter: 32 mm
Colour: blue
Toughened version: yes

The letter "g" at the end of the designation is short for the German gehärtet, meaning toughened - the manufacturer gave it to filters meant to work right next to high-power lamps, especially HBO mercury burners, where ordinary glass does not withstand the high temperature.

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval / Fluoval-2
- Carl Zeiss Jena Laboval Fluorescence

In the excitation path this filter does not work on its own. It is added to the main filter to cut off the red passed by that filter and to narrow the excitation band further.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP560
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - the mirrored surface gives away that this is an interference filter. With filters of this kind the angle to the incoming light is not indifferent and affects their parameters.

The coating on interference filters is sensitive to mechanical damage, for example scratches from improper storage or cleaning. The second enemy is time - several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP490
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - this is an interference filter, which you can tell from the mirrored surface. For that reason the angle at which the filter sits relative to the incoming light matters and affects its parameters.

The coating on interference filters is sensitive to mechanical damage, for example scratches from improper storage or cleaning. Age is a separate matter - several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

Carl Zeiss Jena
Model: KP425
Type: interference excitation filter for fluorescence
Diameter: 32 mm
Mirror coating: yes

Filters 32 mm in diameter can be used in most microscopes from many manufacturers. In Carl Zeiss Jena microscopes they can be used, among others, in the following fluorescence microscopes:
- Carl Zeiss Jena Jenamed Fluorescence (Fluoreszenz)
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Laboval Fluorescence

Note - because this is an interference filter (it has a mirrored surface), the angle at which the filter sits relative to the incoming light matters and affects its parameters.

The coating on interference filters is sensitive not only to mechanical damage, for example scratches from improper storage or cleaning. Several decades of work right next to the HBO lamp can cloud it or make it delaminate, which shows as patches or rainbow islands that do not disappear when you rotate it. In that case the best solution is to replace the filter with one like the one I offer here.

Description of this part for the microscope.

Jena
Inscription: logo "Carl Zeiss Jena" and text "Q1 MADE IN DDR"
Material: aluminium
Length: 52 mm
Width: 14 mm
Mounting: the nameplate is glued on

By default such a nameplate was fitted to most Carl Zeiss Jena microscopes from the Mikroval series onwards. There is also a smaller nameplate - with the manufacturer logo only (without the "Q1 Made in DDR" text). You can see it here: https://www.microscopeparts.eu/part/00604.

Because the adhesive used to attach these plates to the microscope body loses its properties over the years, these plates very often fall off. A nameplate like this makes it possible to restore the factory appearance of a microscope using original parts.

Description of this part for the microscope.

camera to a trinocular head or directly to the microscope stand, even when there is no trinocular head at all.

This is a black tube with an upper element (barrel) 55 mm long. Here (https://www.microscopeparts.eu/gallery/91057) you can see a functionally identical adapter, but grey and with an upper barrel only 25 mm long.

Black adapters of this kind come from the era of the Carl Zeiss Jena L stands (models Carl Zeiss Jena Lg, Lumipan, Ng, Nf or Nu). The grey ones are newer, from the era of the Mikroval series (models Carl Zeiss Jena Laboval, Eduval, Ergaval or Amplival and Docuval).

The mounting fit is of course identical, so both can be used interchangeably.

Basic technical parameters of this tube:
Manufacturer: Carl Zeiss Jena
Colour: black
Inclination angle: none, this is a straight tube
Internal optics: none - not even a deflecting prism
Mounting to a trinocular head or microscope stand: ring dovetail
Ring dovetail diameter: 41.5 mm
Type of connection at the output: empty barrel / tube
Tube diameter at the output: 23.2 mm inner diameter
Barrel / tube length: 55 mm
Tube length adjustment: no - this is not a height-adjustable tube

Because on the output side this adapter has an empty barrel with an inner diameter of 23.2 mm, you can place in it a projection eyepiece of that diameter or a so-called USB eyepiece, that is a digital microscope camera. In addition, adapters between the 23.2 mm barrel and the M42 thread are widely available, and from the M42 thread you can already move on to any other mount: Nikon, Canon, Sony and all the rest.

Such a tube can be mounted directly on the microscope stand, in place of the head. A seat for a ring dovetail of 41.0 - 41.5 mm diameter is found among others in the microscopes:
- Carl Zeiss Jena
- LOMO
- Meopta
- IOR
- Reichert Biopan
- Olympus CH
- Gamma

It is also used in microscopes with a slightly larger seat, among others Zeiss West Germany, Leitz Wetzlar, PZO, Will Wetzlar, Hund Wetzlar.

The adapter can likewise be fitted onto trinocular heads, as many of them have a seat prepared for it, among others:
- the output in the trinocular tubes of the microscopes Carl Zeiss Jena Jenamed, Jenaval, Jenalumar, Jenatech, Jenavert, Jenapol
- the LOMO TRN-1 heads (ЛОМО ТРН-1), found in LOMO Polam microscopes
- some versions of the black intermediate photo tubes for the microscopes Carl Zeiss Jena Lg / Lumipan / Nf and of the grey ones from the Mikroval series (others require a tube that screws in on a thread)

This is not a tube for one particular microscope model. A trinocular head can be mounted not only on the microscope it was sold with, so the correct assumption is that this is a universal tube with a ring dovetail of 41.5 mm diameter on one side and a barrel of 23.2 mm diameter on the other.

In the compatibility section you will find an example list of microscopes this tube fits, although that list is not complete.

Description of this part for the microscope.

These screws fit the following Carl Zeiss Jena microscopes:
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar
- Carl Zeiss Jena Jenapol
- Carl Zeiss Jena Jenavert

The so-called "small illuminators", that is the halogen 25W one (like this: https://www.microscopeparts.eu/gallery/99693) or the HBO 50W, are held by two such screws. Large HBO 250W illuminators with an integrated power supply are mounted on 4 such screws.

If your microscope has only one small illuminator (for example a Jenaval with transmitted light or a Jenavert with EPI illumination), you can extend it with a second (also small) illuminator. You will then need two screws for that.

What is unusual (and sometimes the reason why a user cannot find these screws for a long time) is that they are unscrewed FROM THE FRONT of the microscope. The heads of these screws sit in openings cut into the white sheet-metal side covers of the microscope. You can see these covers with the screw openings here: https://www.microscopeparts.eu/gallery/99692.

Description of this part for the microscope.

a survey condenser with low numerical aperture and a main condenser with high aperture. Both sit on a common carrier at the same time, which lets you switch between them. What I am showing here is the main one, with the 0.9 aperture - the condenser alone, so without the carrier.

Parameters of this condenser:
Manufacturer: Carl Zeiss Jena
Numerical aperture N.A.: 0.9
Correction: achromatic-aplanatic (Achr. apl.)
Immersion: no. This is a dry condenser
Mounting: the condenser carrier holds a centrable threaded ring, and the condenser screws into that ring. The thread diameter is 38 mm.
Iris diaphragm: not on the condenser - the diaphragm sits in the carrier, below the condenser
Intended use: this condenser model was fitted in Carl Zeiss Jena Jenaval microscopes

How it mounts in the carrier:
- The condenser carrier holds a threaded ring, and the ring itself is centrable - two centring screws do that job (these ones: https://www.microscopeparts.eu/part/00535).
- The screws set the position of the ring, and the condenser simply screws into that ring.
- Further down, in the same carrier, sits the iris diaphragm for this main condenser. It is centrable as well and has its own screws for that.

This condenser can also be screwed into the carrier of Carl Zeiss Jena Jenalumar microscopes - it is the same carrier as in Jenaval microscopes. Note, however, that Jenalumar microscopes run the Apl. 0.9 condenser from the factory, that is the aplanatic version without achromatic correction.

The Achr. apl. 0.9 condenser is the working condenser of these microscopes - it covers the whole range of dry objectives, but with immersion objectives it works without making use of their full aperture.

Description of this part for the microscope.

a low-power survey condenser with low numerical aperture and a main condenser with high aperture. Both sit on a common carrier at the same time, which lets you switch between them. What I am offering here is the condenser alone, so without the carrier.

Parameters of this condenser:
Manufacturer: Carl Zeiss Jena
Numerical aperture N.A.: 0.12
Correction: aplanatic
Mounting: the condenser screws into a dedicated carrier. The thread diameter is 36 mm.
Iris diaphragm: yes, the condenser has a ring that opens and closes the diaphragm
Removable top lens: no
Intended use: this condenser model was fitted in Carl Zeiss Jena Jenaval microscopes

This condenser can also be screwed into the carrier of Carl Zeiss Jena Jenalumar microscopes - it is the same carrier as in Jenaval microscopes. Note, however, that Jenalumar microscopes came with a 0.20 N.A. condenser as standard (you can see it here: https://www.microscopeparts.eu/part/00530).

A condenser with such a low numerical aperture is intended for observation with low magnification microscope objectives (1.25x / 3.2x / 6.3x, 10x at most).

Description of this part for the microscope.

Zeiss Jena
Lettering: Jenamed hematology
Material: aluminium
Length: 65 mm
Width: 12 mm
Mounting: the plate is glued on

By default, such a plate was fitted to every Carl Zeiss Jena Jenamed microscope in the "hematology" version. Since the adhesive used to attach these plates to the microscope body loses its properties over the years, these plates very often fall off.

Such a plate lets you bring your microscope back to its factory appearance using original parts.

Description of this part for the microscope.

21 microscope.

Basic parameters:
Manufacturer: Carl Zeiss Jena
Engraving on the objective: Planachromat 6.3x/0.12 ∞/0 Ph
Magnification: 6.3x
Numerical aperture N.A.: 0.12
Tube length: infinity (more precisely: 250 mm)
Optical correction: planachromatic
Cover glass: no - this objective is intended for work without a cover glass
Immersion: no - this is a so-called dry objective
Phase contrast: yes, a special phase contrast for work in reflected light
Polarisation: no - this is not a polarising objective
Thread: M19
Plan compensating eyepieces: yes, required - this objective needs eyepieces with additional correction (marked "PK" at Carl Zeiss Jena)
Direct projection and macro photography: no - this objective does not work in direct projection mode and is not suitable for macro photography with the objective attached directly to a camera

Phase contrast objectives for the Neophot microscopes have a phase ring built differently from the other Ph objectives made by Carl Zeiss Jena - instead of a continuous ring there is a three-segment pattern, somewhat reminiscent of a Wankel engine rotor. This is worth knowing, because it means that a phase contrast objective from a biological microscope will not replace this one in a Neophot, and the other way round.

The reason is a matter of design. In a metallurgical microscope the objective also acts as the condenser, so the illuminating light passes through the same pupil as the light forming the image. With a continuous ring the whole illumination would pass through the phase coating, which lets only part of the light through and reflects a fair amount of it - and those reflections would swamp the already faint phase contrast image. The solution turned out to be an odd number of segments: the image of the diaphragm formed after reflection off the specimen is rotated by 180 degrees, so with three segments it falls into the gaps between them. The illuminating light therefore enters beside the phase coating and returns through it. The solution is described in patent AT 295883 B.

The objective is offered together with its matching slider (Objektivwechselschlitten) with an M19 thread - and that is no coincidence. The position in which the phase sectors come to rest is decided by how far the objective screws into the thread, and every specimen stops slightly differently, which is why the factory selected objective and slider in pairs and wrote both numbers on the card in the case. Buying such a pair together avoids the whole problem - the objective already sits in relation to its slider exactly as it left the works.

Setting it up in the microscope needs neither a service technician nor a phase telescope - the Neophot has a built-in, swing-out Bertrand lens. The procedure is basically this: switch in the Bertrand lens, focus on the phase sectors and use the adjusting screws to bring the image of the sector diaphragm into coincidence with the image of the sectors in the objective; sometimes a slight rotation of the aperture diaphragm helps as well. Should the position of the glass in the sector diaphragm itself ever need correcting - it is held down by an ordinary threaded ring, so it can be turned. The whole thing resembles centring the phase rings in the condenser of a biological microscope.

Two more things are needed on the microscope side for work in phase contrast: the sector diaphragm (Sektorenblende), pushed in front of the open aperture diaphragm, and the auxiliary lens turret (Hilfslinsenrevolver) on the dovetail of the illuminator. The latter images the diaphragm exactly in the plane of the phase coating, which lies slightly differently in each objective - hence a separate auxiliary lens for every magnification. In bright field the objective of course works perfectly normally.

A note for the DIY-minded: an objective like this can be adapted for transmitted light, except that the diaphragm in the condenser is then set not opposite but in line with the segments of the objective, because there is no second pass through the pupil. Phase contrast should appear, but with stronger halo and a directional relief effect, since the gaps in the ring mean that part of the illumination azimuths is missing. On top of that comes the infinity design with no cover glass correction, so a tube lens will be needed. More of an experiment than a working solution - but doable in one evening.

The last photos in the gallery show:

* a photo of the original table indicating which serial numbers of the objective sliders are factory-paired with which serial numbers of the objectives
* two pages of errata to the instruction manual of the Carl Zeiss Jena Neophot 2 microscope.

The "compatibility" section lists, besides the Carl Zeiss Jena Neophot 21 microscope, those microscopes that this objective fits mechanically and optically. What result you get on them, however, can sometimes be a surprise.

Here (https://www.microscopeparts.eu/part/91056) you can read more about using Carl Zeiss Jena objectives with an M19 thread.

Description of this part for the microscope.

21 microscope.

Basic parameters:
Manufacturer: Carl Zeiss Jena
Engraving on the objective: Planachromat 12.5x/0.25 ∞/0 Ph
Magnification: 12.5x
Numerical aperture N.A.: 0.25
Tube length: infinity (more precisely: 250 mm)
Optical correction: planachromatic
Cover glass: no - this objective is intended for work without a cover glass
Immersion: no - this is a so-called dry objective
Phase contrast: yes, a special phase contrast for work in reflected light
Polarisation: no - this is not a polarising objective
Thread: M19
Plan compensating eyepieces: yes, required - this objective needs eyepieces with additional correction (marked "PK" at Carl Zeiss Jena)
Direct projection and macro photography: no - this objective does not work in direct projection mode and is not suitable for macro photography with the objective attached directly to a camera

Phase contrast objectives for the Neophot microscopes have a phase ring built differently from the other Ph objectives made by Carl Zeiss Jena - instead of a continuous ring there is a three-segment pattern, somewhat reminiscent of a Wankel engine rotor. This is worth knowing, because it means that a phase contrast objective from a biological microscope will not replace this one in a Neophot, and the other way round.

The reason is a matter of design. In a metallurgical microscope the objective also acts as the condenser, so the illuminating light passes through the same pupil as the light forming the image. With a continuous ring the whole illumination would pass through the phase coating, which lets only part of the light through and reflects a fair amount of it - and those reflections would swamp the already faint phase contrast image. The solution turned out to be an odd number of segments: the image of the diaphragm formed after reflection off the specimen is rotated by 180 degrees, so with three segments it falls into the gaps between them. The illuminating light therefore enters beside the phase coating and returns through it. The solution is described in patent AT 295883 B.

The objective is offered together with its matching slider (Objektivwechselschlitten) with an M19 thread - and that is no coincidence. The position in which the phase sectors come to rest is decided by how far the objective screws into the thread, and every specimen stops slightly differently, which is why the factory selected objective and slider in pairs and wrote both numbers on the card in the case. Buying such a pair together avoids the whole problem - the objective already sits in relation to its slider exactly as it left the works.

Setting it up in the microscope needs neither a service technician nor a phase telescope - the Neophot has a built-in, swing-out Bertrand lens. The procedure is basically this: switch in the Bertrand lens, focus on the phase sectors and use the adjusting screws to bring the image of the sector diaphragm into coincidence with the image of the sectors in the objective; sometimes a slight rotation of the aperture diaphragm helps as well. Should the position of the glass in the sector diaphragm itself ever need correcting - it is held down by an ordinary threaded ring, so it can be turned. The whole thing resembles centring the phase rings in the condenser of a biological microscope.

Two more things are needed on the microscope side for work in phase contrast: the sector diaphragm (Sektorenblende), pushed in front of the open aperture diaphragm, and the auxiliary lens turret (Hilfslinsenrevolver) on the dovetail of the illuminator. The latter images the diaphragm exactly in the plane of the phase coating, which lies slightly differently in each objective - hence a separate auxiliary lens for every magnification. In bright field the objective of course works perfectly normally.

A note for the DIY-minded: an objective like this can be adapted for transmitted light, except that the diaphragm in the condenser is then set not opposite but in line with the segments of the objective, because there is no second pass through the pupil. Phase contrast should appear, but with stronger halo and a directional relief effect, since the gaps in the ring mean that part of the illumination azimuths is missing. On top of that comes the infinity design with no cover glass correction, so a tube lens will be needed. More of an experiment than a working solution - but doable in one evening.

The last photos in the gallery show:

* a photo of the original table indicating which serial numbers of the objective sliders are factory-paired with which serial numbers of the objectives
* two pages of errata to the instruction manual of the Carl Zeiss Jena Neophot 2 microscope.

The "compatibility" section lists, besides the Carl Zeiss Jena Neophot 21 microscope, those microscopes that this objective fits mechanically and optically. What result you get on them, however, can sometimes be a surprise.

Here (https://www.microscopeparts.eu/part/91056) you can read more about using Carl Zeiss Jena objectives with an M19 thread.

Description of this part for the microscope.

21 microscope.

Basic parameters:
Manufacturer: Carl Zeiss Jena
Engraving on the objective: Planachromat 25x/0,50 ∞/0 Ph
Magnification: 25x
Numerical aperture N.A.: 0,50
Tube length: infinity (more precisely: 250 mm)
Optical correction: planachromatic
Cover glass: no - this objective is intended for work without a cover glass
Immersion: no - this is a so-called dry objective
Phase contrast: yes, a special phase contrast for work in reflected light
Polarisation: no - this is not a polarising objective
Thread: M19
Plan compensating eyepieces: yes, required - this objective needs eyepieces with additional correction (marked "PK" at Carl Zeiss Jena)
Direct projection and macro photography: no - this objective does not work in direct projection mode and is not suitable for macro photography with the objective attached directly to a camera

Phase contrast objectives for the Neophot microscopes have a phase ring built differently from the other Ph objectives made by Carl Zeiss Jena - instead of a continuous ring there is a three-segment pattern, somewhat reminiscent of a Wankel engine rotor. This is worth knowing, because it means that a phase contrast objective from a biological microscope will not replace this one in a Neophot, and the other way round.

The reason is a matter of design. In a metallurgical microscope the objective also acts as the condenser, so the illuminating light passes through the same pupil as the light forming the image. With a continuous ring the whole illumination would pass through the phase coating, which lets only part of the light through and reflects a fair amount of it - and those reflections would swamp the already faint phase contrast image. The solution turned out to be an odd number of segments: the image of the diaphragm formed after reflection off the specimen is rotated by 180 degrees, so with three segments it falls into the gaps between them. The illuminating light therefore enters beside the phase coating and returns through it. The solution is described in patent AT 295883 B.

The objective is offered together with its matching slider (Objektivwechselschlitten) with an M19 thread - and that is no coincidence. The position in which the phase sectors come to rest is decided by how far the objective screws into the thread, and every specimen stops slightly differently, which is why the factory selected objective and slider in pairs and wrote both numbers on the card in the case. Buying such a pair together avoids the whole problem - the objective already sits in relation to its slider exactly as it left the works.

Setting it up in the microscope needs neither a service technician nor a phase telescope - the Neophot has a built-in, swing-out Bertrand lens. The procedure is basically this: switch in the Bertrand lens, focus on the phase sectors and use the adjusting screws to bring the image of the sector diaphragm into coincidence with the image of the sectors in the objective; sometimes a slight rotation of the aperture diaphragm helps as well. Should the position of the glass in the sector diaphragm itself ever need correcting - it is held down by an ordinary threaded ring, so it can be turned. The whole thing resembles centring the phase rings in the condenser of a biological microscope.

Two more things are needed on the microscope side for work in phase contrast: the sector diaphragm (Sektorenblende), pushed in front of the open aperture diaphragm, and the auxiliary lens turret (Hilfslinsenrevolver) on the dovetail of the illuminator. The latter images the diaphragm exactly in the plane of the phase coating, which lies slightly differently in each objective - hence a separate auxiliary lens for every magnification. In bright field the objective of course works perfectly normally.

A note for the DIY-minded: an objective like this can be adapted for transmitted light, except that the diaphragm in the condenser is then set not opposite but in line with the segments of the objective, because there is no second pass through the pupil. Phase contrast should appear, but with stronger halo and a directional relief effect, since the gaps in the ring mean that part of the illumination azimuths is missing. On top of that comes the infinity design with no cover glass correction, so a tube lens will be needed. More of an experiment than a working solution - but doable in one evening.

The last photos in the gallery show:

* a photo of the original table indicating which serial numbers of the objective sliders are factory-paired with which serial numbers of the objectives
* two pages of errata to the instruction manual of the Carl Zeiss Jena Neophot 2 microscope.

The "compatibility" section lists, besides the Carl Zeiss Jena Neophot 21 microscope, those microscopes that this objective fits mechanically and optically. What result you get on them, however, can sometimes be a surprise.

Here (https://www.microscopeparts.eu/part/91056) is the same objective in the version without phase rings. Its description tells you more about using Carl Zeiss Jena objectives with an M19 thread.

Description of this part for the microscope.

Jena microscopes over nearly 100 years. They differ in the appearance of the barrel and in the engraving.

Appearance of this variant of the Carl Zeiss Jena 8x objective:
- black section next to the thread
- silver upper section
- the digit "8" on the first line and "0,20" on the second line, on one side of the silver part of the barrel
- the Carl Zeiss Jena logo and the serial number on the other side of the silver barrel

Here (https://www.microscopeparts.eu/part/99851) you will see the same Carl Zeiss Jena 8x objective, but in a slightly newer variant (with the value "160/-" engraved on the barrel).

The Carl Zeiss Jena 8x objective is often used for macro photography - both on a microscope and on a camera (with an RMS adapter or a bellows unit). Although it is an achromatic objective, it renders fine detail very well and works nicely for focus stacking. It is a good complement to a set together with the Carl Zeiss Jena Semiplan 3.2x, LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x objectives.

Basic parameters of this objective:
Manufacturer: Carl Zeiss Jena
Magnification: 8x
Correction: achromatic
Marking on the objective: 8 0,20
Numerical aperture N.A.: 0.20
Serial number: 503 729
Tube length: 160 mm
Parfocal length: 33 mm - a so-called short barrel objective
Cover glass: either way - objectives with such a low magnification can work both with and without a cover glass
Immersion: no (a so-called dry objective)
Thread: RMS

Important - this objective is suitable for taking pictures with the "direct-projection" technique, because it does not require plan-compensating optics.

A microscope objective with such a low magnification (keeping the 160 mm tube we get an 8:1 reproduction ratio) is used for observation or macro photography of, among other things:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells

Why do I describe the appearance of this variant so precisely in the description of this objective? Some users care about completing their Carl Zeiss Jena microscope with parts from the same series and roughly from the same period. The exact way the parameters are written on the barrel makes it possible to compare this objective not only from the photos in the gallery, but also at the level of the text description - especially for AI systems.

This is a so-called "short barrel objective", with a parfocal length of 33 mm. Very often this objective is mounted on a 12 mm extension, which makes it possible to use it in microscopes that require objectives with a parfocal length of 45 mm. Professional adapters with corrective optics work well here, as do plain metal adapters and the popular DIY parts from a 3D printer.

This objective fits practically any microscope from any manufacturer, provided it has an RMS thread and supports objectives with TL=160 mm and a parfocal length of 33 mm (or 37 / 45 mm if we use a suitable adapter). A few examples of such microscopes are listed in the "compatibility" section, but that is not a complete list.

Carl Zeiss Jena objectives are very popular among users of microscopes from other manufacturers. Because of the historical connections, owners of LOMO microscopes treat them as an obvious replacement for their own Soviet optics.

After the Second World War the Carl Zeiss Jena production plant ended up in the Soviet occupation zone, and the Russians began copying the German technical documentation - see for yourself that the LOMO 8x objectives are an exact copy of the objective presented here: https://www.microscopeparts.eu/?search_2=8x&search_7=ob&search_8=lomo. The objectives made for school microscopes such as the Opta Junat are also a clone of Carl Zeiss Jena optics: https://www.microscopeparts.eu/part/00639.

Description of this part for the microscope.

Jena microscopes over nearly 100 years. They differ in the appearance of the barrel and in the engraving.

Appearance of this variant of the Carl Zeiss Jena 8x objective:
- black section next to the thread
- silver upper section
- the marking "8/0,20 160/-" on one side of the silver part of the barrel
- the Carl Zeiss Jena logo and the serial number on the other side of the silver barrel

Here (https://www.microscopeparts.eu/part/99852) you will see the same Carl Zeiss Jena 8x objective, but in a slightly older variant (without the value "160/-" engraved on the barrel).

The Carl Zeiss Jena 8x objective is often used for macro photography - both on a microscope and on a camera (with an RMS adapter or a bellows unit). Although it is an achromatic objective, it renders fine detail very well and works nicely for focus stacking. It is a good complement to a set together with the Carl Zeiss Jena Semiplan 3.2x, LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x objectives.

Basic parameters of this objective:
Manufacturer: Carl Zeiss Jena
Magnification: 8x
Correction: achromatic
Marking on the objective: 8/0,20 160/-
Numerical aperture N.A.: 0.20
Serial number: above 580 000
Tube length: 160 mm
Parfocal length: 33 mm - a so-called short barrel objective
Cover glass: either way - objectives with such a low magnification can work both with and without a cover glass
Immersion: no (a so-called dry objective)
Thread: RMS

Important - this objective is suitable for taking pictures with the "direct-projection" technique, because it does not require plan-compensating optics.

A microscope objective with such a low magnification (keeping the 160 mm tube we get an 8:1 reproduction ratio) is used for observation or macro photography of, among other things:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells

Why do I describe the appearance of this variant so precisely in the description of this objective? Some users care about completing their Carl Zeiss Jena microscope with parts from the same series and roughly from the same period. The exact way the parameters are written on the barrel makes it possible to compare this objective not only from the photos in the gallery, but also at the level of the text description - especially for AI systems.

This is a so-called "short barrel objective", with a parfocal length of 33 mm. Very often this objective is mounted on a 12 mm extension, which makes it possible to use it in microscopes that require objectives with a parfocal length of 45 mm. Professional adapters with corrective optics work well here, as do plain metal adapters and the popular DIY parts from a 3D printer.

This objective fits practically any microscope from any manufacturer, provided it has an RMS thread and supports objectives with TL=160 mm and a parfocal length of 33 mm (or 37 / 45 mm if we use a suitable adapter). A few examples of such microscopes are listed in the "compatibility" section, but that is not a complete list.

Carl Zeiss Jena objectives are very popular among users of microscopes from other manufacturers. Because of the historical connections, owners of LOMO microscopes treat them as an obvious replacement for their own Soviet optics.

After the Second World War the Carl Zeiss Jena production plant ended up in the Soviet occupation zone, and the Russians began copying the German technical documentation - see for yourself that the LOMO 8x objectives are an exact copy of the objective presented here: https://www.microscopeparts.eu/?search_2=8x&search_7=ob&search_8=lomo. The objectives made for school microscopes such as the Opta Junat are also a clone of Carl Zeiss Jena optics: https://www.microscopeparts.eu/part/00639.

Description of this part for the microscope.

catalogue number: 46 78 36 (also written as 467836)
Colour: blue matt
Diameter: 32 mm
Material: glass

This is a filter that combines the functions of a blue filter and a ground glass diffuser:
- the blue filter is used to convert the yellow, warm light of the bulb into light closer to white light
- the matt filter (called a diffuser or ground glass) is used to even out the light across the whole area of the specimen and to remove the visible filament of the bulb

This does, however, have one consequence: without a visible filament it is not possible to work with illumination set up according to the Koehler method - and Zeiss mentions this in the leaflet supplied with the filter.

Very often only one or two microscope filters can be fitted in a microscope, for example one on the illuminator and the second in the holder below the condenser. The fact that the glass filter offered here is a 2-in-1 solution makes it possible to save the possible second slot for another filter.

The diameter of 32 mm is a standard with many manufacturers, which means this filter can be used with microscopes of numerous brands. The "compatibility" section lists over a dozen such microscopes, but it is not a complete list.

Description of this part for the microscope.

10x
Mounting diameter: 23.2 mm

Because this is important, I will write it again: this is a single eyepiece, not a pair of eyepieces.

This is a solution for people who:
- either have a pair of these eyepieces, but one of them needs to be replaced
- or have a microscope with a monocular head

For Will Wetzlar microscopes, eyepieces from practically any manufacturer can be used, provided that they are designed for a finite tube length system and have a mounting diameter of 23.2 mm. However, many users appreciate having original parts.

This eyepiece also works the other way around - it fits almost any microscope from any manufacturer that allows the use of eyepieces with a mounting diameter of 23.2 mm. Users of microscopes from many manufacturers are happy to choose German eyepieces because of their high quality. I have included some examples in the "compatibility" section, but this is definitely not a complete list.

Microscope users have several names for eyepieces of this type with a large field of view. Among others:
- wide field eyepiece
- widefield ocular
- WF eyepiece
- wide angle eyepiece
- large field of view eyepiece

Description of this part for the microscope.

Germany
Designation: Ph2 F40/0,65 160/0,17
Manufacturer catalogue number: 46 07 06
Magnification: 40x
Correction: Semi-planachromatic
Numerical aperture N.A.: 0.65
Tube length: 160 mm
Parfocal length: 45 mm
Cover glass: yes, 0.17 mm thick
Immersion: no (a so-called dry objective)
Thread: RMS
Phase contrast: yes, the objective has an internal phase ring matching the Ph2 position in the condenser
Specimen protection: yes, the objective has a spring-loaded mechanism that protects the slide from being crushed

The letter "F" at the beginning of the objective model name (F 40 / 0.65) means that this is a semi-planachromatic objective, i.e. flatter than an achromat but less flat than a planachromat. "F" does not mean that the objective is intended for work with fluorescence light.

This objective fits practically any microscope from any manufacturer, provided it has an RMS thread and accepts 160 mm tube length objectives with a parfocal length of 33, 37 or 45 mm. A few example microscopes are listed in the "compatibility" section, but that list is not complete.

Description of this part for the microscope.

objective:
Manufacturer: Zeiss West Germany
Engraving on the objective: Planapo 63/1,4 Oel 160/-
Manufacturer catalogue number: 46 18 40 - 9901 (also written as 461840-9901)
Magnification: 63x
Numerical aperture (N.A.): 1.4
Optical correction: plan-apochromatic
Immersion: yes, oil
Coverslip: according to the engraving on the barrel of this objective, it can be used both without a coverslip and with a standard coverslip of 0.17 mm thickness
Tube length: 160 mm
Parfocal distance: 45 mm
Thread: RMS
Specimen protection: yes, the objective has a spring-loaded mechanism preventing the slide with the specimen from being broken
Phase contrast: no - the objective has no phase rings inside
DIC: prisms allowing work in DIC mode are available on the market for this objective (sold separately)

This objective fits practically any microscope of any manufacturer, provided it has an RMS thread and accepts objectives for a 160 mm tube length with a parfocal distance of 33, 37 or 45 mm. A few such microscopes are listed as examples in the "compatibility" section, but this is not a complete list.

Description of this part for the microscope.

Carl Zeiss Jena
Engraving on the objective: Planachromat 25x/0,50 ∞/0
Magnification: 25x
Numerical aperture N.A.: 0,50
Free working distance: 3,1 mm
Tube length: infinity (more precisely: 250 mm)
Optical correction: planachromatic
Cover glass: no - this objective is intended for work without a cover glass
Immersion: no - this is a so-called dry objective
Phase contrast: no - this objective has no phase ring inside
Polarisation: no - this is not a polarising objective
Thread: M19
Plan compensating eyepieces: yes, required - this objective calls for eyepieces with additional correction (designated "PK" by Carl Zeiss Jena)
Direct projection and macro photography: no - this objective does not work in direct projection mode and is not suitable for macro photography by connecting the objective directly to a camera

This objective can be used as:
- an objective for work in reflected light (EPI), for biological as well as, among others, metallurgical or mineralogical applications
- an objective for work in transmitted light, among others with biological specimens or, for example, with mineralogical thin sections

A few facts about Carl Zeiss Jena objectives with M19 thread (CZJ M19) and their compatibility with various microscopes of this company:
- these objectives serve mostly technical applications and are intended for work without a cover glass (marking ∞/0)
- CZJ M19 objectives intended for biological applications (that is, marked ∞/0,17) are most often used on Carl Zeiss Jena NU / NU2 microscopes
- in Carl Zeiss Jena Nf and Lumipan microscopes, CZJ M19 objectives are used together with the EPI illuminator and can then work both in bright field and in dark field
- in Carl Zeiss Jena Polmi-A microscopes, CZJ M19 objectives can be used, but they give a magnification other than the nominal one
- Carl Zeiss Jena Amplival / Amplival Pol / Amplival Interphako / Peraval microscopes have an interchangeable nosepiece, and there is also a nosepiece intended for these microscopes that accepts objectives with M19 thread
- Carl Zeiss Jena Metaval microscopes use newer versions of CZJ M19 objectives (those with a coarsely knurled rim and a glossy barrel), yet many people experiment with older M19 objectives on these microscopes
- Carl Zeiss Jena Epignost and BK 70x50 microscopes were produced in various configurations - and some work with CZJ M19 objectives
- Carl Zeiss Jena Vertival / Epival / Nf / BK 70x50 microscopes often allow work with CZJ M19 objectives in EPI dark field mode
- on inverted metallographic Carl Zeiss Jena Epityp-2 / Neophot-21 microscopes, many people use biological objectives intended for work with a cover glass alongside metallurgical ones, and place the slide with the specimen on the stage "upside down", that is, with the cover glass facing downwards

Description of this part for the microscope.

objective:
Manufacturer: Lomo (ЛОМО)
Magnification: 40x
Correction: achromatic
Engraving on the objective: 40 0,65 Ф-2 ЛОМО
Numerical aperture N.A.: 0,65
Working distance: 0,55 mm
Tube length: 160 mm
Parfocal length: 33 mm - a so-called short barrel objective
Cover glass: yes, 0,17 mm thick
Phase contrast: yes, type F-2 (Ф-2), which means there are two phase rings inside the objective
Immersion: no (dry objective, sometimes called an "air immersion" objective)
Specimen protection: no, the objective has no spring-loaded mechanism
Thread: RMS
Work in brightfield without phase contrast: possible, but even the manufacturer states in the manual that the image quality is worse than with an objective without phase rings inside

A very important note: two phase rings inside an objective bring to mind variable phase contrast (PhZ at PZO or PhV at Carl Zeiss Jena). With LOMO, however, this is rather something like a "second type of positive phase contrast". LOMO states in the manual (https://laboratorium.dp.ua/item/68) that one image is obtained when light passes through both rings (with the condenser iris diaphragm open) - and a different one when the diaphragm is closed far enough that light no longer reaches the outer, wide ring and only the inner ring works. The manufacturer recommends viewing the specimen in both modes, because together they give a more reliable idea of its structure. The contrast stays positive (thicker or denser parts of the specimen appear darker against a bright background), and both modes differ from work with the single-ring "Ф" objectives and the LOMO KF-4 condenser (ЛОМО KФ-4), where both the objective and the condenser diaphragm have only one ring. So the resulting effect does change - but this is not variable phase contrast; the change is stepwise (either-or), not continuous.

The objective presented here fits the LOMO KF-5 condenser (ЛОМО KФ-5). That condenser has a mounting diameter of 37 mm and is very often used on microscopes from other makers, among them Carl Zeiss Jena and Olympus (especially Olympus CH). With a suitable build-up ring fitted (3D printed, for example), this condenser is commonly used in microscopes with a 39,5 mm condenser seat as well. The instructions for setting up LOMO KF-5 phase contrast can be found here: https://scopica.ru/proj/ustroystvo-dlya-nablyudeniya-metodom-fazovogo-kontrasta-kf-5/

This is a so-called short barrel objective, with a parfocal length of 33 mm. It is very commonly mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives of 45 mm length. Professional adapters with protective optics, metal adapters and the popular 3D printed DIY solutions all work here.

LOMO objectives are very popular with owners of microscopes from other makers. Because of the historical links, owners of Carl Zeiss Jena microscopes treat them as an obvious substitute for those German objectives.

This objective fits practically any microscope from any maker, provided it has an RMS thread and accepts objectives with TL=160 mm and a parfocal length of 33 mm (or 37 / 45 mm if a suitable adapter is used). A few such microscopes are listed in the "compatibility" section, but that is not a complete list.

Description of this part for the microscope.

The tube allows a camera or a camera body to be attached to a trinocular head or directly to the microscope body, even when there is no trinocular head.

Basic technical parameters of this tube:
Manufacturer: LOMO (ЛОМО)
Colour: black, rings and barrel chrome-plated
Tilt angle: none, this is a straight tube
Internal optics: none - not even a deflecting prism
Mounting to the trinocular head or microscope body: ring dovetail (male part)
Dovetail diameter: 41 mm
Type of connection at the output: empty tube / barrel
Tube diameter at the output: 23.2 mm internal diameter
Length of the barrel / tube: variable
Length adjustment: yes - the barrel is extendable, with a scale from 140 to 200 mm and a knurled locking ring

This is the version with adjustable tube length. A scale from 140 to 200 mm is engraved on the extendable barrel, with a reference line and intermediate divisions, and the setting is locked with a knurled ring. This gives two things at once. First, a continuous change of the image scale - the longer the tube, the larger the image falling on the sensor or the film, so the framing can be adjusted without changing the objective. Second, and more importantly, the ability to work with objectives computed for different optical tube lengths: 160, 170, 180, 190 and 200 mm. Carl Zeiss Jena and LOMO objectives are computed for 160 mm, Leitz Wetzlar for 170 mm, some objectives of metallurgical and measuring microscopes for 190 or 200 mm - here you simply set the barrel to the right value and the objective works under its design conditions, instead of delivering an image with residual aberration.

Since the adapter has an empty barrel with an internal diameter of 23.2 mm on the output side, a projection eyepiece of that diameter can be placed in it, or a so-called "USB eyepiece", that is a digital microscope camera. Adapters between the 23.2 mm barrel and the M42 thread are also widely available, and from the M42 thread you can move on to any other mount: Nikon, Canon, Sony and others.

Such a tube can be mounted directly on the microscope body instead of the head. A dovetail seat with a diameter of 41.0 - 41.5 mm is found, among others, on the microscopes:
- LOMO
- Carl Zeiss Jena
- Meopta
- IOR
- Reichert Biopan
- Olympus CH

It is also often used in microscopes with a slightly larger seat, among others Zeiss West Germany, Leitz Wetzlar, PZO, Will Wetzlar, Hund Wetzlar.

The "compatibility" section gives an example list of microscopes this tube fits, although it is not a complete list.

The last photo shows a LOMO Erudit microscope with this photo tube and a projection eyepiece mounted. It is an example of use.

Description of this part for the microscope.

be attached to a trinocular head or directly to the microscope body, even when there is no trinocular head.

Basic technical parameters of this tube:
Manufacturer: Carl Zeiss Jena
Colour: grey
Tilt angle: none, this is a straight tube
Internal optics: none - not even a deflecting prism
Mounting to the trinocular head or microscope body: ring with a dovetail
Dovetail diameter: 41 mm
Type of connection at the output: empty tube / barrel
Tube diameter at the output: 23.2 mm internal diameter
Length of the barrel / tube: 25 mm
Length adjustment: no - this is not a tube with adjustable height

Since the adapter has an empty barrel with an internal diameter of 23.2 mm on the output side, a projection eyepiece of that diameter can be placed in it, or a so-called "USB eyepiece", that is a digital microscope camera. Adapters between the 23.2 mm barrel and the M42 thread are also widely available, and from the M42 thread you can move on to any other mount: Nikon, Canon, Sony and others.

Such a tube can be mounted directly on the microscope body instead of the head. A dovetail seat with a diameter of 41.0 - 41.5 mm is found, among others, on the microscopes:
- Carl Zeiss Jena
- LOMO
- Meopta
- IOR
- Reichert Biopan
- Olympus CH

It is also often used in microscopes with a slightly larger seat, among others Zeiss West Germany, Leitz Wetzlar, PZO, Will Wetzlar, Hund Wetzlar.

The adapter can equally well be fitted onto trinocular heads, as many of them have a seat prepared for it, among others:
- the output in the trinocular tubes of the Carl Zeiss Jena Jenamed, Jenaval, Jenalumar, Jenatech, Jenavert, Jenapol microscopes
- the LOMO TRN-1 heads (ЛОМО ТРН-1), found in the LOMO Polam microscopes
- some versions of the intermediate photo tubes for the Carl Zeiss Jena Mikroval series microscopes (others require a tube screwed onto a thread)

This is not a "tube for one specific microscope model". A trinocular head can be mounted not only on the microscope it was sold with - it is therefore correct to assume that this is a universal tube, with a 41 mm dovetail on one side and a 23.2 mm barrel on the other.

The "compatibility" section gives an example list of microscopes this tube fits, although it is not a complete list.

Description of this part for the microscope.

the OEM version of this objective; it was made for export and has no engraved manufacturer logo
Magnification: 40x
Correction: achromatic
Marking on the objective: 40 0,65
Numerical aperture N.A.: 0,65
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: yes, 0.17 mm thick
Immersion: no
Specimen protection: yes, the objective has a spring-loaded front mount that prevents breaking the slide
Thread: RMS

LOMO exported its microscopes to Western Europe, where they were sold under the names Bresser Biolam / Bresser Erudit (mainly in Germany) and Zenith Biolam (in the UK). These microscopes often (but not always) came with special versions of the objectives without the "ЛОМО" engraving.

A note on the Bresser Erudit microscope: Bresser sold two different microscopes under this name. The first was a Lomo microscope labelled "Bresser Erudit", the second is the plastic, Chinese-made "Bresser Erudit DLX" microscope.
The microscope objective offered here fits the first of these two Erudit microscopes. A photo gallery of the first model can be found here: https://www.microscopeparts.eu/gallery/lomo-erudit-microscopes-207.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

correction: achromatic
Model: E 40 0.65 160/0.17
Numerical aperture N.A.: 0.65
Cover glass: yes, 0.17 mm thick
Thread: RMS
Tube length: 160 mm
Parfocal length: 45 mm (long barrel objective)
Immersion: no
Operating mode: objectives marked "E." are already CF objectives (CFN to be precise) and need no additional correction

This objective needs no additional correction from a tube lens or from the eyepieces. That makes it possible to fit it to microscopes of other makes, and in photomicrography it works in direct projection mode (it throws the image straight onto the camera sensor, with no relay optics needed).

This is the so-called black series of objectives, named after the black plastic barrel. They were used mainly in the Nikon Alphaphot YS2 microscope. That was the period when manufacturers were experimenting with a new look for microscope parts, and exactly the same black series appeared for instance in the Leitz / Leica HM-LUX 3 microscope or in the Will Wetzlar V300 / V355 / V365 microscopes.

This objective fits practically any microscope of any make, provided it has an RMS thread and supports objectives with TL = 160 mm and parfocal lengths of 33 / 37 and 45 mm. A few such microscopes are listed in the "compatibility" section, but that list is not complete.

Description of this part for the microscope.

100x
Colour correction: achromatic
Model: E. 100 1.25 oil 160/0.17
Numerical aperture N.A.: 1.25
Cover glass: yes, 0.17 mm thick
Thread: RMS
Tube length: 160 mm
Parfocal length: 45 mm (long barrel objective)
Immersion: yes, oil
Operating mode: objectives marked "E." are already CF objectives (CFN to be precise) and need no additional correction

This objective needs no additional correction from a tube lens or from the eyepieces. That makes it possible to fit it to microscopes of other makes, and in photomicrography it works in direct projection mode (it throws the image straight onto the camera sensor, with no relay optics needed).

This is the so-called black series of objectives, named after the black plastic barrel. They were used mainly in the Nikon Alphaphot YS2 microscope. That was the period when manufacturers were experimenting with a new look for microscope parts, and exactly the same black series appeared for instance in the Leitz / Leica HM-LUX 3 microscope or in the Will Wetzlar V300 / V355 / V365 microscopes.

This objective fits practically any microscope of any make, provided it has an RMS thread and supports objectives with TL = 160 mm and parfocal lengths of 33 / 37 and 45 mm. A few such microscopes are listed in the "compatibility" section, but that list is not complete.

Description of this part for the microscope.

Gleitfett grades differ in their parameters.

Gleitfett I E10 and Gleitfett II E75 were supplied with the Carl Zeiss Jena micromanipulator.
The Gleitfett III E410 offered here was supplied with the Carl Zeiss Jena Neophot-21 microscope.

This MAY suggest (although I have no proof in the form of manufacturer documentation) that the lower numbers (I and II) and the lower values of the "E" parameter (E10 and E75) were intended for finer mechanisms - and may therefore have a lower viscosity, for example. The III E410 grease, with its high "E" value, was supplied with a heavy microscope built around massive mechanics - so it may well be thicker.

This grease can of course be used on microscopes from other manufacturers as well - a few are listed in the "compatibility" section, but that is by no means a complete list.

Description of this part for the microscope.

5x
Field of view number: 16
Mounting diameter: 23.2 mm
Designation: PK = plan compensating - recommended for work with planachromatic objectives, but they also work without any trouble with achromats or apochromats

Because of their very high quality they are often used on microscopes from other manufacturers as well, especially when Carl Zeiss Jena Planachromat objectives are mounted in them. The "compatibility" section lists a long series of microscopes these eyepieces fit - but that list is definitely not complete.

Important: these eyepieces work both on microscopes with a finite tube length (160 mm, for example) and on microscopes with infinity optics. That means you can use them on the Carl Zeiss Jena Amplival microscope just as well as on the Carl Zeiss Jena NU-2 microscope.

Description of this part for the microscope.

of view number: 12
Mounting diameter: 23.2 mm
Designation: PK = plan compensating - recommended for work with planachromatic objectives, but they also work without any trouble with achromats or apochromats

Because of their very high quality they are often used on microscopes from other manufacturers as well, especially when Carl Zeiss Jena Planachromat objectives are mounted in them. The "compatibility" section lists a long series of microscopes these eyepieces fit - but that list is definitely not complete.

Important: these eyepieces work both on microscopes with a finite tube length (160 mm, for example) and on microscopes with infinity optics. That means you can use them on the Carl Zeiss Jena Amplival microscope just as well as on the Carl Zeiss Jena NU-2 microscope.

A note - eyepieces with such a strong magnification are in my opinion better suited to a quick look than to permanent work. I write "in my opinion" on purpose, because this comes from using them and not from the manufacturer's description.
A 16x eyepiece magnification should be treated as a zoom that brings out no additional detail (the resolution is not increased). This matters for example with heads that have their own extra magnification (such as Carl Zeiss Jena heads with a built-in 1.5x or 1.6x factor) - working with a 100x oil immersion objective you then theoretically get 100*1.5*16 = 2400x, while physics does not allow light from the visible range to be usefully magnified for the human eye beyond roughly 1250x - so this is what is called empty magnification.

Description of this part for the microscope.

microscope or a camera (via an RMS adapter or a bellows). Although it is an achromat, it renders fine detail very sharply and performs well in focus stacking. It complements a set together with the LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x.

Basic parameters of this objective:
Manufacturer: Lomo, Russia (ЛОМО)
Magnification: 8x
Correction: achromatic
Marking on the objective: 8 0.20
Numerical aperture N.A.: 0.20
Serial number: starts with "91"
Year of manufacture: 1991
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: not critical - objectives with such low magnification work both with and without a cover glass
Immersion: no (dry objective)
Thread: RMS

Important - this objective is suitable for direct projection photography, as it does not require plan-compensating optics.

A microscope objective with such low magnification (with a 160 mm tube length it gives an 8:1 reproduction ratio) is used, among other things, for observing or photographing:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells (micromollusks)
- and much more

Why do I state the year of manufacture in the description of this objective? Older LOMO microscope parts (objectives, microscopes, heads) have the year of manufacture encoded in the serial number: the first two digits of the serial number are the year. Many users want to complete their microscope with parts made in the same year as the microscope itself.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

Fun fact: LOMO made adapters between the RMS and M27 threads. Thanks to them, this objective was fitted to the Lomo Biolam I and Lomo Biolam M microscopes. Owners of Carl Zeiss Axio series microscopes with M27 thread also took advantage of this and used these adapters.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

20x
Correction: Fluotar (other names: Fluor and fluorite)
Numerical aperture N.A.: 0.60
Tube length: 160 mm
Parfocal length: 33 mm
Cover glass: yes, 0.17 mm thick
Immersion: no (dry objective)
Thread: RMS

The objective comes in its original protective case marked "Wild Heerbrugg Switzerland".

Fluotar is the name Wild Heerbrugg used for its fluorite objectives, i.e. semi-apochromats - their lenses contain fluorite or glass with similar optical properties. A standard achromat corrects chromatic errors for only two colors (red and blue), so colored fringes may appear along the edges of objects. An apochromat corrects for three colors (red, green and blue) and represents the highest class of correction. The Fluotar sits between them - colored fringes are clearly smaller than with an achromat, although the correction is not as complete as with an apochromat. Fluorite also transmits ultraviolet light well, which is why objectives of this type were used in fluorescence microscopy.

This is a so-called "short barrel" objective with a parfocal length of 33 mm. It is very common to mount this objective on a 12 mm extension, which allows it to be used in microscopes that require 45 mm parfocal objectives. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well for this.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL=160 mm and a parfocal length of 33 mm (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

for inverted and upright biological microscopes, made in Japan.

Basic objective parameters:
Manufacturer: Nikon, Japan
Model: Ph3 40 DL 0.55 LWD 160/0-2
Magnification: 40x
Numerical aperture (N.A.): 0.55
Optical correction: achromat
Phase contrast: Ph3 DL - Ph3 indicates the size of the phase ring (requires a matching Ph3 annulus in the condenser), DL (Dark Low) means dark, i.e. positive phase contrast - the object appears darker than the background
Working distance (WD): ~2.1 - 2.5 mm - LWD (Long Working Distance)
Correction collar: compensates for cover glass or vessel bottom thickness in the range 0 - 2.0 mm
Cover glass: the objective can be used without a cover glass, with a standard cover glass approx. 0.17 mm thick, and also with specimens observed through the bottom of a Petri dish up to 2.0 mm thick
Immersion: no (dry objective)
Tube length: 160 mm
Parfocal length: 45 mm
Thread: RMS
Optics: CF (Nikon CF-160) - requires no compensating eyepiece and allows photography by direct projection

This objective is suitable for:
- inverted microscopes - observation through the bottom of a Petri dish or cell culture flask
- upright biological microscopes - observation of specimens with or without a cover glass

Phase contrast work requires a compatible phase contrast condenser or a slider with a phase contrast annulus.

Commonly used, inexpensive cover glasses are 0.17 mm thick mainly in theory. Even the standard for class #1.5 allows a range of 0.16 - 0.19 mm, and in cheap Chinese cover glasses you will find in practice pieces from approx. 0.13 to 0.25 mm, often not matching the thickness stated on the box. Only #1.5H (high precision) cover glasses have a guaranteed thickness of 0.170 mm with a tolerance of +/- 0.005 mm. Variation in cover glass thickness clearly degrades image contrast and resolution (spherical aberration). The correction collar fitted to the objective offered here lets you adjust the optics to the combined thickness of the cover glass and the medium layer beneath it. This compensates for most of the variation found in practice.

In addition, the correction collar of this objective can be set to "0" for work without a cover glass, or to large values (up to 2.0 mm) to adapt the optics to observation through a microscope slide (0.8 - 1.2 mm), a glass Petri dish (usually 1.5 - 2.0 mm - thicker dishes are outside the collar range) or a plastic Petri dish (usually approx. 1 mm, in the range 0.8 - 1.2 mm).

This objective fits practically any microscope from any manufacturer, provided it has an RMS thread and uses objectives for 160 mm tube length with a parfocal length of 33, 37 or 45 mm. Some example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

(ЛОМО)
Version: this is the OEM version of this objective; it was made for export and has no engraved manufacturer logo
Magnification: 90x
Correction: achromatic
Marking on the objective: A 90*1.25
Numerical aperture N.A.: 1.25
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: yes, 0.17 mm thick
Immersion: yes, oil
Specimen protection: yes, the objective has a spring-loaded front mount that prevents breaking the slide
Thread: RMS

LOMO exported its microscopes to Western Europe, where they were sold under the names Bresser Biolam / Bresser Erudit (mainly in Germany) and Zenith Biolam (in the UK). These microscopes often (but not always) came with special versions of the objectives without the "ЛОМО" engraving.

Apart from the missing manufacturer name, the export version also differs in the way the parameters are marked. On the LOMO version the marking read "МИ 90 1.25", where "МИ" is an abbreviation written in Cyrillic, corresponding to "MI" and meaning "oil immersion". The export version dropped the Cyrillic (and even the immersion information), and the marking changed to "A 90*1.25".

A note on the Bresser Erudit microscope: Bresser sold two different microscopes under this name. The first was a Lomo microscope labelled "Bresser Erudit", the second is the plastic, Chinese-made "Bresser Erudit DLX" microscope.
The microscope objective offered here fits the first of these two Erudit microscopes. A photo gallery of the first model can be found here: https://www.microscopeparts.eu/gallery/lomo-erudit-microscopes-207.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

17-A
Magnification: 50x
Numerical aperture N.A.: 0.95
Optical correction: Apochromat
Additionally: cover glass thickness correction collar, range 0.12 - 0.22 mm
Tube length: infinity
Thread: M25
Cover glass: yes, required
Immersion: no (so-called dry objective)

Commonly used, cheap cover glasses are 0.17 mm thick mostly on paper. Even the standard for class #1.5 allows a range of 0.16-0.19 mm, and cheap Chinese cover glasses in practice come in anywhere from approx. 0.13 to 0.25 mm, often not matching the thickness stated on the box. Only #1.5H (high precision) cover glasses have a guaranteed thickness of 0.170 mm with a tolerance of +/- 0.005 mm. With high-aperture dry objectives such as this Apochromat 50x/0.95, variation in cover glass thickness noticeably reduces image contrast and resolution (spherical aberration). The correction collar fitted to this objective lets you adjust the optics to the combined thickness of the cover glass and the mounting medium layer beneath it, within a range of 0.12 mm to 0.22 mm. This compensates for most of the variation encountered in practice.

This objective fits, among others, the following microscopes:
- Carl Zeiss Jena Jenamed
- Carl Zeiss Jena Jenalab
- Carl Zeiss Jena Jenaval
- Carl Zeiss Jena Jenalumar

As for the Carl Zeiss Jena Jenamed microscope, this objective fits every variant:
- Carl Zeiss Jena Jenamed variant
- Carl Zeiss Jena Jenamed Fluorescence
- Carl Zeiss Jena Jenamed hematology
- Carl Zeiss Jena Jenamed cytology
- Carl Zeiss Jena Jenamed 2

Description of this part for the microscope.

Lomo, USSR (ЛОМО)
Magnification: 8x
Correction: achromatic
Marking on the objective: 8 0.20
Numerical aperture N.A.: 0.20
Serial number: starts with "66"
Year of manufacture: 1966
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: not critical - objectives with such low magnification work both with and without a cover glass
Immersion: no (dry objective)
Thread: RMS

The LOMO 8x objective (model 8 0.20) is frequently used for macro photography with a microscope or a camera (via an RMS adapter or a bellows). Although it is an achromat, it renders fine detail very sharply and performs well in focus stacking. It complements a set together with the LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x.

Important - this objective is suitable for direct projection photography, as it does not require plan-compensating optics.

A microscope objective with such low magnification (with a 160 mm tube length it gives an 8:1 reproduction ratio) is used, among other things, for observing or photographing:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells (micromollusks)
- and much more

Why do I state the year of manufacture in the description of this objective? Older LOMO microscope parts (objectives, microscopes, heads) have the year of manufacture encoded in the serial number: the first two digits of the serial number are the year. Many users want to complete their microscope with parts made in the same year as the microscope itself.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

Fun fact: LOMO made adapters between the RMS and M27 threads. Thanks to them, this objective was fitted to the Lomo Biolam I and Lomo Biolam M microscopes. Owners of Carl Zeiss Axio series microscopes with M27 thread also took advantage of this and used these adapters.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

20) is frequently used for macro photography with a microscope or a camera (via an RMS adapter or a bellows). Although it is an achromat, it renders fine detail very sharply and performs well in focus stacking. It complements a set together with the LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x.

Basic parameters of this objective:
Manufacturer: Lomo, Russia (ЛОМО)
Magnification: 8x
Correction: achromatic
Marking on the objective: 8 0.20
Numerical aperture N.A.: 0.20
Serial number: starts with "92"
Year of manufacture: 1992
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: not critical - objectives with such low magnification work both with and without a cover glass
Immersion: no (dry objective)
Thread: RMS

Important - this objective is suitable for direct projection photography, as it does not require plan-compensating optics.

A microscope objective with such low magnification (with a 160 mm tube length it gives an 8:1 reproduction ratio) is used, among other things, for observing or photographing:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells (micromollusks)
- and much more

Why do I state the year of manufacture in the description of this objective? Older LOMO microscope parts (objectives, microscopes, heads) have the year of manufacture encoded in the serial number: the first two digits of the serial number are the year. Many users want to complete their microscope with parts made in the same year as the microscope itself.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

Fun fact: LOMO made adapters between the RMS and M27 threads. Thanks to them, this objective was fitted to the Lomo Biolam I and Lomo Biolam M microscopes. Owners of Carl Zeiss Axio series microscopes with M27 thread also took advantage of this and used these adapters.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.

Description of this part for the microscope.

objective (model 8 0.20) is frequently used for macro photography with a microscope or a camera (via an RMS adapter or a bellows). Although it is an achromat, it renders fine detail very sharply and performs well in focus stacking. It complements a set together with the LOMO 3.7x, Carl Zeiss Jena Semiplan 6.3x and Nikon M Plan 10x.

Basic parameters of this objective:
Manufacturer: Lomo, USSR (ЛОМО)
Magnification: 8x
Correction: achromatic
Marking on the objective: 8 0.20
Numerical aperture N.A.: 0.20
Serial number: starts with "86"
Year of manufacture: 1986
Tube length: 160 mm
Parfocal length: 33 mm - so-called short barrel objective
Cover glass: not critical - objectives with such low magnification work both with and without a cover glass
Immersion: no (dry objective)
Thread: RMS

Important - this objective is suitable for direct projection photography, as it does not require plan-compensating optics.

A microscope objective with such low magnification (with a 160 mm tube length it gives an 8:1 reproduction ratio) is used, among other things, for observing or photographing:
- insects
- minerals
- inclusions in amber
- handwriting
- micro shells (micromollusks)
- and much more

Why do I state the year of manufacture in the description of this objective? Older LOMO microscope parts (objectives, microscopes, heads) have the year of manufacture encoded in the serial number: the first two digits of the serial number are the year. Many users want to complete their microscope with parts made in the same year as the microscope itself.

This is a so-called short barrel objective with a parfocal length of 33 mm. It is very often mounted on a 12 mm extension, which allows it to be used in microscopes that require objectives with a 45 mm parfocal length. Professional adapters with protective optics, metal adapters and popular DIY 3D-printed adapters all work well here.

Fun fact: LOMO made adapters between the RMS and M27 threads. Thanks to them, this objective was fitted to the Lomo Biolam I and Lomo Biolam M microscopes. Owners of Carl Zeiss Axio series microscopes with M27 thread also took advantage of this and used these adapters.

LOMO objectives are very popular with owners of microscopes from other manufacturers. Due to historical ties, owners of Carl Zeiss Jena microscopes regard them as an obvious replacement for the German objectives.

This objective fits practically any microscope from any manufacturer, as long as it has an RMS thread and accepts objectives with TL = 160 mm and 33 mm parfocal length (or 37 / 45 mm with a suitable adapter). Several example microscopes are listed in the "compatibility" section, but the list is not complete.