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Description of this part for the microscope.

transmitted or reflected light microscopes, as long as the eyepiece mounting diameter on the microscope head is 23.2 mm.

Manufacturer: PZO
Model: K15x
Magnification: 15x
Image: micrometer and X-crosshair
Mounting diameter: 23.2 mm

The eyepiece features diopter adjustment and image sharpness adjustment on a micrometer slide. The entire unit is housed in an original wooden box.

The kit includes a slide with a standard micrometer scale to calibrate this eyepiece at any magnification.

Identical K15x eyepieces were also made by other manufacturers, such as Lomo and Carl Zeiss Jena.

Description of this part for the microscope.

eyepiece contains two lines in the field of view used for adjusting DIC interference fringes, but this is the only difference compared to an otherwise identical eyepiece used for adjusting phase contrast. Therefore it can be used:
- for adjusting DIC
- for adjusting phase contrast
- for observing the iris diaphragm
- for observing the filament when setting illumination according to the Köhler standard

This is one of those microscope elements for which many different names are used. Among others:
- phase telescope
- phase contrast telescope
- phase alignment telescope
- phase adjustment telescope
- phase centering telescope
- phase contrast centering telescope
- phase contrast alignment telescope
- phase contrast adjustment telescope
- centering telescope
- condenser centering telescope
- condenser alignment telescope
- condenser adjustment telescope
- alignment telescope
- adjustment telescope
- inspection telescope
- aperture viewing telescope
- back focal plane viewing telescope
- auxiliary microscope
- phase contrast auxiliary microscope
- alignment auxiliary microscope
- centering auxiliary microscope
- adjustment auxiliary microscope
- auxiliary telescope
- centering scope
- alignment scope
- phase scope
- phase viewer
- phase contrast viewer
- phase centering eyepiece
- phase contrast eyepiece
- phase alignment eyepiece
- phase telescope eyepiece
- centering eyepiece
- condenser centering eyepiece
- adjustment eyepiece
- inspection eyepiece

Description of this part for the microscope.

10x
Correction: Achromat
Numerical aperture: 0.24
Tube length: 160 mm
Focal length: 45 mm
Cover glass: no
Immersion: no
Thread: RMS
Info: PI = polarization-interference objective (red ring).

Compatible with the following PZO condensers:
- PZO KPI 2
- slit condenser
PI objectives are among the components of the PZO UPI set (i.e. the so-called DIC).

VERY IMPORTANT: the marking on the objective is "PI" (in lowercase: "pi"), meaning [P]-polarization [I]-interference.
In many descriptions available on the Internet, you can find information that this is a PLAN objective. This is an ERROR caused by misinterpreting the marking as PL.

Note: another INCORRECT piece of information often found online is that these are DIC objectives. This is not true.
DIC according to Pluta (niem: DIC nach Pluta), sold by PZO, achieves the DIC effect (i.e. a 3D relief image) using standard achromatic PZO objectives (and not only those). Objectives marked PI with a red ring are not required for this.

It can be used with any microscope from any manufacturer that supports RMS objectives, TL=160 mm, FL=45 mm.

Description of this part for the microscope.

microscopes from any manufacturer, as long as the microscope supports eyepieces with a mounting diameter of 23.2 mm.

Description of this part for the microscope.

diffuser)
- blue
- yellow
- green

New (usually Chinese) microscope filters are sometimes not even made of glass. And even if they are made of glass - you may encounter scandalous examples where the glass is only surface-colored. Unfortunately, cheap colored glass filters may not be internally homogeneous and can cause light refraction distortions.

This filter set by PZO was originally sold together with the PZO Biolar microscope. It was manufactured in the 1970s (and certainly before 1977), so these are optical glasses that are about half a century old! They have never been used until now (this is so-called NOS - New Old Stock), therefore these are excellent old-class optical glasses of the highest quality.

Filters with a 32 mm diameter are used - and can be used - in microscopes from various manufacturers:
- Carl Zeiss Jena
- Zeiss West Germany
- Eschenbach
- Meopta
- Nikon
- ROW
- Leitz Wetzlar
- Wild
- Hund
- Kosmos
- and many others

Important - popular microscopes by Lomo (for example Lomo Biolam) have a 33 mm filter holder, so the filters shown here have too small a diameter and may fall out from some Lomo holders.