Sigma 17-50mm F2.8 EX DC OS HSM is an Auto Focus (AF) Standard Zoom lens with APS-C / DX max sensor coverage and it is designed to be used with Canon EF mount lenses.
Lens Mount
Sigma 17-50mm F2.8 EX DC OS HSM is compatible with cameras that have Canon EF lens mount.
Sensor Coverage
Max sensor coverage of Sigma 17-50mm F2.8 EX DC OS HSM is APS-C / DX.
Focal Range
Sigma 17-50mm F2.8 EX DC OS HSM has a focal range of 17-50mm and 2.9X zoom ratio. When mounted on a APS-C / DX format camera, it provides an 35mm (FF) equivalent of 25.5 - 75mm.
Optical Image Stabilization
Sigma 17-50mm F2.8 EX DC OS HSM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Zoom Method
Rotary (extending)
Aperture
Sigma 17-50mm F2.8 EX DC OS HSM has a constant max aperture of f2.8 from 17mm all the way to the 50mm .