Made of glass with polished face and ground edges. Refractive
index 1.52 approximately.
Diameter 38mm
Focus mm |
-01 |
50 |
-02 |
75 |
-03 |
100 |
-04 |
150 |
-05 |
200 |
-06 |
250 |
-07 |
300 |
-08 |
500 |
-09 |
1000 |
? |
? |
? |
? |
Diameter 50mm
Focus mm |
-11 |
50 |
-12 |
75 |
-13 |
100 |
-14 |
150 |
-15 |
200 |
-16 |
250 |
-17 |
300 |
-18 |
500 |
-19 |
1000 |
|