Bi-convex lens fitted in nickel plated metal frame with Bakelite handle.
Diameter Focal Length Magnification
Cat. No. |
Dia. (mm.)Â |
Focal Lt. (cm.)Â |
Magnifi. |
A |
50 |
10 |
3.5x |
B |
50 |
15 |
2.5x |
C |
50 |
20 |
2.25x |
D |
60 |
10 |
3.5x |
E |
60 |
15 |
2.5x |
F |
60 |
20 |
2.25x |
G |
75 |
10 |
3.5x |
H |
75 |
15 |
2.5x |
I |
75 |
20 |
2.25x |
J |
90 |
20 |
2.25x |
K |
100 |
15 |
2.5x |
L |
100 |
20 |
2.25x |
M |
125 |
30 |
2.25x |
N |
150 |
30 |
1.83x |
Â
|