The OKS5-250-1 lens is purposed for usual film shots.
Manufacturer | NPO "EKRAN" | |
Lens system | - | |
Focal length | f' | 250.0 mm |
Angle of view | 2ω' | 6°12' |
Effective relative aperture | f:nэ | 1:2.9 |
Lens length | Σd | 110.6 mm |
Front focal length | S | - |
Back focal length | S' | 151.5 mm |
Flange focal distance | Z | - |
Block length | B | 230 mm |
Block max. diameter | D | 135 mm |
Rear diameter | D' | - |
Front element diameter | d1 | 89.5 mm |
Rear element diameter | d2 | 56.5 mm |
Mount thread | - | |
Distance from rear end of the housing to the focal plane | l | - |
Aperture blades quantity | ? | |
Frame size | 16x22 mm | |
Weight | 3.1 kg |