The camera was switched to a Zenit 12S varient with through the lens metering. The lens and camera have an electrical interconnection to let the meter read correctly with the Tair-3S lens. The normal lens is now a Helios-44M-4
Technical Specifications
Film Size: 35mm
Image Size: 24x36mm
Dimensions:
height: cm
width: cm
depth: cm
weight: gm
Normal
Lens Mount: m42
Typical serial no:
source: www.commiecameras.com