Cookie
This website requires cookies to provide all of its features. For more information on what data is contained in the cookies, please see our Privacy Policy page. To accept cookies from this site, please click the Accept button below.
Specification of LOMO OKS7-28-1 lens (2/28mm)
The OKS7-28-1 lens has extended back focal length of 32 mm. Optical construction is complex system consisting of 9 elements grouped into 7 components. Image quality corresponds to early OKS4-28-1 lens, but OKS7-28-1 lens has longer back focal length.
| Manufacturer | NPO "EKRAN" | |
| Lens system | - | |
| Focal length |
f' | 28.0 mm |
| Angle of view | 2ω' | 51°50' |
| Effective relative aperture | f:nэ | 1:2.3 |
| Lens length | Σd | 43.3 mm |
| Front focal length | S | - |
| Back focal length | S' | 31.5 mm |
| Flange focal distance | Z | 41 mm |
| Block length | B | 45 mm |
| Block max. diameter | D | 45 mm |
| Rear diameter | D' | SpM 33x0.75 |
| Front element diameter | d1 | 31 mm |
| Rear element diameter | d2 | 18.5 mm |
| Mount thread | SpM33x0.75 cl 2a | |
| Distance from rear end of the housing to the focal plane |
l | 32.5 mm |
| Aperture blades quantity | 12 ? | |
| Frame size | 16x22 mm | |
| Weight | 130 g |
