Ricoh A12 28mm f/2.5 lens

Weight: 210 g
Brand: Ricoh
Description: Mount: Mamiya 645, lens type: standard, focal length: variable, min. focal length: 55 mm, max. focal length: 110 mm, aperture F at min. focal length: 4.50, aperture F at max. focal length
Type: Lens
Functions: Focusing motor for Nikon F
Length: 50.4 mm
Diameter: 68.7 mm
Focal length: Permanent
Lens type: Wide angle
Minimum focus distance: 0.2 m
Auto focus: There is
Focal length of prime lens: 28 mm
Bayonet: Ricoh GXR
Filter thread diameter: 40.5 mm
Aperture F at max. focal length: 2.5
Aperture F at min. focal length: 2.5
Minimum aperture F: 22
Number of aspherical elements: 2
Number of element groups: 6
Number of elements: 9