Sigma AF 800mm f5.6 EX DG APO HSM Sigma SA

Brand: Sigma
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: 521 mm
Diameter: 156.5 mm
Focal length: Permanent
Lens type: Telephoto lens
Minimum focus distance: 7 m
Auto focus: There is
Focal length of prime lens: 800 mm
Bayonet: Sigma SA
Filter thread diameter: 46 mm
Aperture F at max. focal length: 5.6
Aperture F at min. focal length: 5.6
Number of element groups: 9
Number of low dispersion elements: 2
Number of elements: 12