Olympus ED 7-14mm f/4.0

Weight: 780 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: 119.5 mm
Diameter: 86.5 mm
Max. focal length: 14 mm
Min. focal length: 7 mm
Focal length: Variable
Lens type: Wide angle
Zoom ratio: 2x
Max viewing angle: 114 degrees min
Minimum focus distance: 0.11 m
Auto focus: There is
Bayonet: 4/3
Aperture F at max. focal length: 4
Aperture F at min. focal length: 4
Minimum aperture F: 22
Number of aperture blades: 7
Security: Dustproof, frost resistance, moisture protection
Minimum viewing angle: 75 deg.min
Number of aspherical elements: 2
Number of element groups: 12
Number of low dispersion elements: 4
Number of elements: 18