Sigma AF 17-70mm f/2.8-4.0 DC MACRO HSM new Contemporary Pentax KA/KAF/KAF2

Weight: 465 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, ultrasonic motor
Length: 82 mm
Diameter: 79 mm
Max. focal length: 70 mm
Min. focal length: 17 mm
Focal length: Variable
Lens type: Standard
Zoom ratio: 4.1x
Max viewing angle: 79.7 deg.min
Minimum focus distance: 0.22 m
Auto focus: There is
For non-full frame cameras only: Yes
Bayonet: Pentax KA/KAF/KAF2/KAF3
Filter thread diameter: 72 mm
Aperture F at max. focal length: 4
Aperture F at min. focal length: 2.8
Minimum aperture F: 22
Number of aperture blades: 7
Minimum viewing angle: 22.9 deg.min
Number of aspherical elements: 3
Number of element groups: 14
Number of low dispersion elements: 3
Number of elements: 16