Sigma AF 50-200mm f/4-5.6 DC OS HSM Pentax KA/KAF/KAF2

Weight: 420 g
Brand: Sigma
Description: Mount: Pentax KA/KAF/KAF2/KAF3, lens type: standard, focal length: variable, autofocus, for non-full-frame cameras only, image stabilization, min. focal length: 50 mm, max.
Type: Lens
Functions: Focusing motor for Nikon F, ultrasonic motor, internal focusing
Length: 101.9 mm
Diameter: 74 mm
Max. focal length: 200 mm
Min. focal length: 50 mm
Focal length: Variable
Lens type: Standard
Zoom ratio: 4x
Max viewing angle: 27.9 deg.min
Minimum focus distance: 1.1 m
Auto focus: There is
Image stabilization: There is
For non-full frame cameras only: Yes
Bayonet: Pentax KA/KAF/KAF2/KAF3
Filter thread diameter: 55 mm
Aperture F at max. focal length: 5.6
Aperture F at min. focal length: 4
Minimum aperture F: 22
Number of aperture blades: 8
Minimum viewing angle: 7.1 deg.min
Number of element groups: 10
Number of low dispersion elements: 1
Number of elements: 14