Sigma AF 17-70mm f/2.8-4.5 DC MACRO Nikon F

Weight: 455 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: Macro mode, internal focusing
Length: 82.5 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: 72.4 deg.min
Minimum focus distance: 0.2 m
Auto focus: There is
For non-full frame cameras only: Yes
Bayonet: Nikon F
Filter thread diameter: 72 mm
Aperture F at max. focal length: 4.5
Aperture F at min. focal length: 2.8
Minimum aperture F: 22
Number of aperture blades: 7
Minimum viewing angle: 20.2 deg.min
Number of aspherical elements: 2
Number of element groups: 12
Number of low dispersion elements: 1
Number of elements: 15