| 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 | 280.0mm | 278.9mm | 280.0mm | 280.0mm |
|
Accessory Thread |
M 105 X 1 |
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 | M 62 x 0.75 |
|
Max. f/# |
64 |
64 |
64 | 45 |
|
Weight |
1215g |
1260g |
1160g | 970g |
|
Overall Length |
101.5mm |
101.5mm |
101.5mm | 101.5mm |
Recommended Format Size |
240 X 300 mm |
240 X 300 mm |
240
X 300 mm (8 X 10") |
240 X 300 mm |
Image Circle Diameter at f/22 |
411mm | 411mm | 411mm | 411mm |
Angle of View at f/22 |
70 degrees | 70 degrees | 70 degrees | 70 degrees |
Lens Displacement at f/22 (vertical/horizontal) |
||||
| 5 X 7" ; 121 X 170 mm | 127/111mm | 127/111mm | 127/111mm | 127/111mm |
| 130 X 180 mm ; 122 X 171 mm | 126/111mm | 126/111mm | 126/111mm | 126/111mm |
| 180 X 240 mm ; 171 X 231 mm | 84/71mm | 84/71mm | 84/71mm | 84/71mm |
| 8 X 10" ; 194 X 245 mm | 68/59mm | 68/59mm | 68/59mm | 68/59mm |
| 240 X 300 mm ; 230 X 290 mm | 31/25mm | 31/25mm | 31/25mm | 31/25mm |
| 10 X 12" ; 245 X 295 mm | 21/18mm | 21/18mm | 21/18mm | 21/18mm |
Effective Focal Length (F') |
293.8mm |
293.8mm |
293.8mm | 293.8mm |
Back Focal Length (S'F') |
244.1mm |
244.1mm |
244.1mm | 244.1mm |
Principal Point Separation (HH') |
-5.4mm |
-5.4mm |
-5.4mm | -5.4mm |