Sigma AF 28mm f/1.8 EX DG ASPHERICAL MACRO Pentax KA/KAF/KAF2

Weight: 500 g
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, macro mode
Length: 82.5 mm
Diameter: 836 mm
Focal length: Permanent
Lens type: Macro lens
Max viewing angle: 75.4 deg.min
Minimum focus distance: 0.2 m
Auto focus: There is
Focal length of prime lens: 28 mm
Bayonet: Pentax KA/KAF/KAF2/KAF3
Filter thread diameter: 77 mm
Aperture F at min. focal length: 1.8
Minimum aperture F: 22
Number of aperture blades: 9
Number of aspherical elements: 2
Number of element groups: 9
Number of elements: 10