Lens Elements, Groups |
4, 3 |
Filter Mounting Thread |
M 38 X 0.75 |
Max. f/# |
16 |
Push-On Filter Size |
43mm |
Max. Outer Diameter |
47mm or *54mm |
Weight |
140g or *200g |
Overall Length |
25mm or *33mm |
Recommended Format (negative) Size |
22.8 X 23.5 mm or *23.5 X 23.5 mm |
Effective Focal Length (F') |
30.8mm |
Back Focal Length (S'F') |
26.4mm |
Principal Point Separation (HH') |
0.3mm |
Shortest Image Distance (S'O') |
0.5m or *0.75m |