Focal length-135mm
Relative aperture - 1:3.5
Diaphragms -from 3.5 to 22
Focusing- 1.2m to infinite
Made by KoMZ - Kazan.
for Zenit Screw Mount M42
Lens does not have preset ring or stops.
All numbers are silk screened.
It made as simple and economical as lens could be.
Complete set included metall screw-in sun shade, front and rear cowers, and plastic box. No printed manuals were found inside brand new set.