Voigtlander Petzval lens with F/3 1/6 max aperture.
| No | Diameter of lens element | Focal Length | Recommended Format | Image circle |
| 3B | 53mm (2″) | 174mm | 9x12cm (4×5″) | 180mm |
| 4B | 66mm (2 1/2″) | 209mm | 12x16cm | 230mm |
| 5B | 79mm (3″) | 245mm | 13x18cm (5×7″) | 280mm |
| 6B | 92mm (3 1/2″) | 306mm | 18x24cm (8×10″) | 330mm |
| 7B | 105mm (4″) | 395mm | 26x31cm | 420mm |
3B, 4B and 5B – rack and pinion, 6B and 7B – rigid mount.
