Pentax SMC FA 645 400mm f/5.6 ED IF

Weight: 1260 g
Brand: Pentax
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: 252 mm
Diameter: 83 mm
Focal length: Permanent
Lens type: Telephoto lens
Minimum focus distance: 3m
Auto focus: There is
For non-full frame cameras only: Yes
Focal length of prime lens: 400 mm
Bayonet: Pentax 645
Filter thread diameter: 77 mm
Aperture F at max. focal length: 5.6
Aperture F at min. focal length: 5.6
Minimum aperture F: 45
Number of element groups: 6
Number of elements: 7