Pentax SMC DA* 16-50mm f/2.8 ED AL IF SDM

Weight: 565 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, ultrasonic motor, internal focusing
Length: 98.5 mm
Diameter: 84 mm
Max. focal length: 50 mm
Min. focal length: 16 mm
Focal length: Variable
Lens type: Standard
Zoom ratio: 3.1x
Max viewing angle: 83 deg.min
Minimum focus distance: 0.3 m
Auto focus: There is
For non-full frame cameras only: Yes
Bayonet: Pentax KA/KAF/KAF2/KAF3
Filter thread diameter: 77 mm
Aperture F at max. focal length: 2.8
Aperture F at min. focal length: 2.8
Minimum aperture F: 22
Number of aperture blades: 9
Security: Dustproof, waterproof
Minimum viewing angle: 31.5 deg.min
Number of element groups: 12
Number of elements: 15