Olympus 9mm f/8 Fish-Eye Body Cap

Weight: 30 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: Internal focus
Length: 13 mm
Diameter: 56 mm
Focal length: Permanent
Lens type: Ultra wide angle fisheye
Minimum focus distance: 0.2 m
Focal length of prime lens: 9 mm
Bayonet: Micro 4/3
Aperture F at max. focal length: 8
Aperture F at min. focal length: 8
Number of aperture blades: 1
Number of aspherical elements: 2
Number of element groups: 4
Number of elements: 5