| ocal Length | 21 mm |
| Aperture | T 2.0 - T 22 - full close |
| Image Circle | 36 mm (diameter) |
| Length | 4.0 " / 101 mm |
| Close Focus | 1 ft / 0.3 m |
| Weight | 2.9 lbs / 1.3 kg |
| Lens Mount | PL - Stainless Steel |
| Focus Rotation | 300° |
| Iris Rotation | 180° |
| Front Diameter | 95mm / 3.7 " |
| Front Filter | No |
| Rear Filter | No |
| Rear Net Holder | No |
| Matched Focus / Iris Ring Locations | Yes (all focal lengths) |
| Matched Dimensions in Set | Yes (except 15mm and 135mm) |
| Expanded Focus in Critical Range | No |