TTX Carl Zeiss Jena Biometar 2.8/80 (Made in DDR)

Focal length: 80 mm
Aperture: F/2.8-F/22.0 with intermediate values ​​4, 5.6, 8, 11, 16
Number of aperture blades: 8 pieces
Optical design: 5 lenses in 4 groups (Biometar type design)
Bayonet/thread : Pentacon Six, P6, B Mount
Front filter diameter: 58mm
Weight: approx. 260g
MDF: approx. 1m