| Available Mounts | Compur 3 | Prontor Prof. 3 | Copal 3 | BK 3 |
|
Lens Elements, Groups |
6, 4 | 6, 4 | 6, 4 | 6, 4 |
| Flange Focal Distance | 229.0mm | 227.9mm | 229.0mm | 229.0mm |
|
Accessory Thread |
M 86 X 1 |
M 86 X 1 |
M 86 X 1 | M 86 X 1 |
|
Mounting Thread |
M 62 X 0.75 |
M 62 X 0.75 |
M 62 X 0.75 | M 62 X 0.75 |
|
Max. f/# |
64 |
64 |
64 | 64 |
|
Weight |
950g |
1000g |
895g | 725g |
|
Overall Length |
83.5mm |
83.5mm |
83.5mm | 83.5mm |
Recommended Format Size |
180 X 240 mm |
180 X 240 mm |
180
X 240 mm (8 X 10") |
180 X 240 mm |
Image Circle Diameter at f/22 |
337mm | 337mm | 337mm | 337mm |
Angle of View at f/22 |
70 degrees | 70 degrees | 70 degrees | 70 degrees |
Lens Displacement at f/22 (vertical/horizontal) |
||||
| 4 X 5" ; 96 X 120 mm | 109/102mm | 109/102mm | 109/102mm | 109/102mm |
| 5 X 7" ; 121 X 170 mm | 85/72mm | 85/72mm | 85/72mm | 85/72mm |
| 130 X 180 mm ; 122 X 171 mm | 84/72mm | 84/72mm | 84/72mm | 84/72mm |
| 180 X 240 mm ; 171 X 231 mm | 37/30mm | 37/30mm | 37/30mm | 37/30mm |
| 8 X 10" ; 194 X 245 mm | 19/15mm | 19/15mm | 19/15mm | 19/15mm |
Effective Focal Length (F') |
240.8mm |
240.8mm |
240.8mm | 240.8mm |
Back Focal Length (S'F') |
200.4mm |
200.4mm |
200.4mm | 200.4mm |
Principal Point Separation (HH') |
-4.5mm |
-4.5mm |
-4.5mm | -4.5mm |