Canon EF-S 17-55mm f/2.8 IS USM

Weight: 645 g
Brand: Canon
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
Additional Information: 3 step image stabilizer
Type: Lens
Functions: Focusing motor for Nikon F, ultrasonic motor
Length: 110.6 mm
Diameter: 83.5 mm
Max. focal length: 55 mm
Min. focal length: 17 mm
Focal length: Variable
Lens type: Standard
Zoom ratio: 3.2x
Max viewing angle: 78.3 deg.min
Minimum focus distance: 0.35 m
Auto focus: There is
Image stabilization: There is
For non-full frame cameras only: Yes
Bayonet: Canon EF-S
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: 7
Minimum viewing angle: 27.5 deg.min
Number of aspherical elements: 2
Number of element groups: 12
Number of low dispersion elements: 2
Number of elements: 19