Sigma 20mm f/1.4 DG HSM Art Nikon F

Weight: 950 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: 129.8 mm
Diameter: 90.7 mm
Min. focal length: 14 mm
Focal length: Permanent
Lens type: Wide angle
Minimum focus distance: 0.3 m
Auto focus: There is
Focal length of prime lens: 20 mm
Bayonet: Nikon F
Aperture F at max. focal length: 1.4
Aperture F at min. focal length: 1.4
Minimum aperture F: 16
Number of aperture blades: 9
Number of element groups: 11
Number of low dispersion elements: 7
Number of elements: 15