LOMO Microscope Objective - APO 20x0.65, defective

Description

LOMO Microscope Objective - APO 20x0.65, defective
Appearance is good, but glass has severe separation (delamination).
Low price, no return.
Objective code
OM-21
Mount
0.8″-36 (RMS)
Tube length
160mm
Cover glass thickness
0.17mm
Magnification
20х
Numeric aperture
0.65
Focal length
8.43mm
Immersion
Dry
Work distance
0.67mm
Parfocal height
33mm (RMS)
Image size
18mm
Correction
Apochromat
Light
Transmitted, bright field
Spectrum range
400-700nm
Research method
-
Contrast method
-
Other features
-
Mount thread:
RMS (0.8"-36tpi)
Correction:
Apochromat
Magnification:
20x
Numerical aperture:
0.65
Focal length:
8.43mm
Tube length:
160mm
Work distance:
0.67mm
Parfocal height:
33mm
Special features:
Purpose:
For biological, bacteriological and other researches