The Zorki 10 is a fixed-lens Zorki coupled rangefinder camera with an integrated light meter. Selenium meter cells surround the lens. This was the first fully automatic camera produced in the former Soviet Union, as well as the first to use ASA/DIN markings rather than the Soviet GOST numbers, however these ASA numbers were still mostly useless as they didn't match any known film speeds (some Zorki 10 cameras apparently had GOST numbers instead of ASA though, as it's shown in a Polish camera manual).