Zeiss Biogon 2.8/21 ZM

Weight: 280 g
Brand: Zeiss
Description: Mount: Leica M, lens type: wide-angle, focal length: fixed, prime lens focal length: 21 mm, aperture F at min. focal length: 2.80, aperture F at max. focal length: 2.80
Type: Lens
Length: 75 mm
Diameter: 53 mm
Focal length: Permanent
Lens type: Wide angle
Minimum focus distance: 0.5 m
Focal length of prime lens: 21 mm
Bayonet: Leica M
Filter thread diameter: 46 mm
Aperture F at max. focal length: 2.8
Aperture F at min. focal length: 2.8
Minimum aperture F: 22
Number of aperture blades: 10
Number of element groups: 7
Number of elements: 9