Canon EF 300mm f/4L USM

Weight: 1165 g
Brand: Canon
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, ultrasonic motor, internal focusing
Length: 213.5 mm
Diameter: 90 mm
Focal length: Permanent
Lens type: Telephoto lens
Max viewing angle: 81.5 deg.min
Minimum focus distance: 2.5 m
Auto focus: There is
Focal length of prime lens: 300 mm
Bayonet: Canon EF
Filter thread diameter: 77 mm
Aperture F at min. focal length: 4
Minimum aperture F: 32
Number of aperture blades: 8
Number of element groups: 7
Number of elements: 8