# Part name:
Motic BA310 / BA210 EF-N Plan 40x/0.65 oo/0.17 microscope objective CCIS

# Original page URL:
https://www.microscopeparts.eu/part/motic-ba310-ba210-ef-n-plan-40x-0-65-oo-0-17-microscope-objective-ccis-99842

# Part manufacturer:
Motic

# Full manufacturer name:
Xiamen Motic Group Co., Ltd.

# Other names of this manufacturer:
- Motic Europe
- Motic Instruments Inc.
- Motic Deutschland GmbH
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Objective

# Description and specifications:
Planachromatic microscope objective with 40x magnification for the Motic BA210 and BA310 microscopes.

Manufacturer: Motic
Marking on the objective: Motic EF-N Plan 40x/0.65 ∞/0.17
Magnification: 40x
Correction: PLAN achromatic
Optical system: CCIS (Color Corrected Infinity System - part of the image correction is performed by the tube lens of the Motic stand, which is why the objective is intended for stands of this brand)
Numerical aperture N.A.: 0.65
Working distance W.D.: approx. 0.4-0.5 mm
Tube length: infinity
Parfocal distance: 45 mm
Field number F.N.: 20
Cover glass: yes, 0.17 mm thick
Immersion: no (this is a dry objective)
Thread: RMS
Spring-loaded mount: yes - the front mount retracts when pressed against the specimen, which at a working distance of about half a millimetre saves both the objective and the cover glass
Lead-free glass: yes - the mount carries the crossed-out Pb symbol
Colour ring: blue, according to the colour code for 40x magnification

Objectives of the EF-N Plan series were the factory equipment of the older generation of the Motic BA210 and BA310 microscopes, while the newer models of these series, designated Elite (BA210E, BA310E), are fitted with the next-generation EC Plan objectives - this objective is therefore the correct spare part for the older stands and not for the Elite versions.

Mechanically this objective can be screwed into the nosepiece of many other microscopes, since the RMS thread and the 45 mm parfocal distance are standard - a correct image, however, cannot be obtained that way.
- in older stands corrected for 160 mm it will not work, because it is an infinity-corrected objective and requires a tube lens
- in stands of other manufacturers, including infinity-corrected ones, a residual aberration remains, because part of the correction is performed by the tube lens of the CCIS system, which is built into the stand of the Motic microscope and matched by the manufacturer to exactly this optics
- in the remaining Motic microscopes with the CCIS system the objective does produce an image, but it is not the factory choice for them - in stands with field number 22 it runs out of field, and in inverted stands it runs out of working distance.

# Examples of use
- if you own the Motic BA210 / Motic BA310 microscope and this objective is missing
- if you already have such an objective in your microscope, but it is in very poor condition or damaged
- if you want to have such an objective as a spare

# Removed from microscope:
Motic BA310

# Also compatible with the following microscopes:
- Motic BA310
- Motic BA210

# Names, descriptions, terms, and search contexts under which this part is searched.
- Motic BA310 microscope repair parts
- Motic BA310 Objektiv 40x Ersatz
- Motic EF-N Plan 40x/0.65 Objektiv gesucht
- Motic BA210 Mikroskop Objektiv 40x nachrüsten
- Motic CCIS Objektiv 40x unendlich 0.65
- Motic BA210 Objektiv 40x Frontlinse gesprungen
- Motic BA310 Objektiv 40x Feder klemmt
- Motic BA210 LED Objektivrevolver Objektiv fehlt 40x
- Motic EF-N Plan objective replacement 40x
- spare 40x objective Motic BA310 microscope
- Motic BA210 40x objective front lens scratched
- Motic BA310 40x objective thread damaged
- Motic BA310 Digital 40x objective CCIS infinity
- DIY repair Motic BA210 student microscope 40x objective
- objektiv Motic EF-N Plan 40x pro mikroskop BA310
- obiettivo Motic BA310 40x ricambio
- obiettivo Motic EF-N Plan 40x microscopio
- objetivo Motic BA210 40x repuesto
- objetivo Motic EF-N Plan 40x microscopio
- obiektyw mikroskopowy Motic BA210 BA310 40x
- Motic buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99842.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99842.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99842-motic-ba310-ba210-ef-n-plan-40x-0-65-oo-0-17-microscope-objective-ccis
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99842.media.md
- Representative photo: https://www.microscopeparts.eu/photo/motic-ba310-ba210-ef-n-plan-40x-0-65-oo-0-17-microscope-objective-ccis-99842-2
- Representative video: https://www.microscopeparts.eu/play/99842-1
- Other parts from category Objective: https://www.microscopeparts.eu/objective
- More Objective removed from microscope Motic BA310: https://www.microscopeparts.eu/objective/from/motic/ba310
- More Objective compatible with microscope Motic BA310: https://www.microscopeparts.eu/objective/for/motic/ba310
- More Objective removed from microscopes Motic: https://www.microscopeparts.eu/objective/from/motic
- More Objective compatible with microscopes Motic: https://www.microscopeparts.eu/objective/for/motic

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-09-30