No |
Explanation |
Color / Explanation |
Example |
1 |
The lettering color characterizes the objective type and the contrasting method intended for the objective. |
black: standard (plus DIC in some types)
red: low-strain for polarization / DIC
green: phase 1, 2, 3 |
|
2 |
Magnification / numerical aperture |
3 |
Tube length / cover glass thickness.
Tube length "infinite" marks ICS optics. |
4 |
Magnification color coding |
—— black: 1,25x
—— brown: 2,5x
—— red: 4x, 5x
—— orange: 6,3x
—— yellow: 10x
—— green: 16x, 20x, 25x, 32
—— light blue: 40x, 50x
—— dark blue: 63x
—— white: 100x, 150x |
5 |
Function element (knurled collar)
- For optical correction with various immersion media or differing cover glass / vessel bottom thicknesses or
- on objectives with variable aperture iris
|
 |
6 |
Color coding for the immersion liquid to be used |
—— black: oil
—— white: water
—— orange: glycerol
—— red: variable |
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