Soviet film lens OKS 1 - 35 - 1 ( 2 / 35 mm)
Film camera KONVAS Mount OCT 18
Specifications
Focal length - 35 mm
Maximum aperture 2
Minimum aperture 16
Aperture blades - 16
Aperture plate: 22 16 11 8 5.6 4 2.8 2.3 2