| Available Mounts | Compur 3 | Prontor Prof. 3 | BK 3 |
|
Lens Elements, Groups |
6, 4 | 6, 4 | 6, 4 |
| Flange Focal Distance | 455.2mm | 454.1mm | 455.2mm |
|
Accessory Thread |
M 105 X 1 |
M 105 X 1 |
M 105 X 1 |
|
Mounting Thread |
M 62 X 0.75 |
M 62 X 0.75 |
M 62 X 0.75 |
|
Max. f/# |
64 |
64 |
45 |
|
Weight |
1700g |
1740g |
1460g |
|
Overall Length |
128.1mm |
128.1mm |
128.1mm |
Recommended Format Size |
240 X 300 mm |
240 X 300 mm |
240 X 300 mm |
Image Circle Diameter at f/22 |
500mm | 500mm | 500mm |
Angle of View at f/22 |
56 degrees | 56 degrees | 56 degrees |
Lens Displacement at f/22 (vertical/horizontal) |
|||
| 180 X 240 mm ; 171 X 231 mm | 136/119mm | 136/119mm | 136/119mm |
| 8 X 10" ; 194 X 245 mm | 121/108mm | 121/108mm | 121/108mm |
| 240 X 300 mm ; 230 X 290 mm | 88/77mm | 88/77mm | 88/77mm |
| 10 X 12" ; 245 X 295 mm | 79/70mm | 79/70mm | 79/70mm |
Effective Focal Length (F') |
470.5mm |
470.5mm |
470.5mm |
Back Focal Length (S'F') |
400.8mm |
400.8mm |
400.8mm |
Principal Point Separation (HH') |
-5.5mm |
-5.5mm |
-5.5mm |