Olympus 17mm f/1.8

Weight: 120 g
Brand: Olympus
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: 35.5mm
Diameter: 57.5 mm
Min. focal length: 18 mm
Focal length: Permanent
Lens type: Wide angle
Minimum focus distance: 0.25 m
Auto focus: There is
Focal length of prime lens: 17 mm
Bayonet: Micro 4/3
Filter thread diameter: 46 mm
Aperture F at max. focal length: 1.8
Aperture F at min. focal length: 1.8
Minimum aperture F: 22
Number of aperture blades: 7
Number of aspherical elements: 2
Number of element groups: 6
Number of low dispersion elements: 1
Number of elements: 9