| 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 | 335.8mm | 334.7mm | 335.8mm | 335.8mm |
|
Accessory Thread |
M 120 X 1 |
M 120 X 1 |
M 120 X 1 | M 120 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 | 45 |
|
Weight |
1545g |
1590g |
1490g | 1320g |
|
Overall Length |
112mm |
112mm |
112mm | 112mm |
Recommended Format Size |
240 X 300 mm |
240 X 300 mm |
240
X 300 mm (10 X 12") |
240 X 300 mm |
Image Circle Diameter at f/22 |
491mm | 491mm | 491mm | 491mm |
Angle of View at f/22 |
70 degrees | 70 degrees | 70 degrees | 70 degrees |
Lens Displacement at f/22 (vertical/horizontal) |
||||
| 180 X 240 mm ; 171 X 231 mm | 131/115mm | 131/115mm | 131/115mm | 131/115mm |
| 8 X 10" ; 194 X 245 mm | 116/103mm | 116/103mm | 116/103mm | 116/103mm |
| 240 X 300 mm ; 230 X 290 mm | 83/72mm | 83/72mm | 83/72mm | 83/72mm |
| 10 X 12" ; 245 X 295 mm | 74/65mm | 74/65mm | 74/65mm | 74/65mm |
Effective Focal Length (F') |
350.5mm |
350.5mm |
350.5mm | 350.5mm |
Back Focal Length (S'F') |
292.5mm |
292.5mm |
292.5mm | 292.5mm |
Principal Point Separation (HH') |
-5.5mm |
-5.5mm |
-5.5mm | -5.5mm |