Sigma 24-70mm F2.8 DG OS HSM is an Auto Focus (AF)
Standard Zoom lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount cameras.
Lenses in Canon EF Mount with Same Focal and Aperture Range
Lens Mount
Sigma 24-70mm F2.8 DG OS HSM is compatible with cameras that have Canon EF lens mount.Some of the latest released cameras with Canon EF lens mount are
Canon 1D X III,
Canon 6D MII and
Canon 5D MIV.
Sensor Coverage
Max sensor coverage of Sigma 24-70mm F2.8 DG OS HSM is 35mm FF.
Focal Range
Sigma 24-70mm F2.8 DG OS HSM has a focal range of 24-70mm and 2.9X zoom ratio. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 38.4 - 112mm.
Optical Image Stabilization
Sigma 24-70mm F2.8 DG OS HSM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Body Colour
Sigma 24-70mm F2.8 DG OS HSM is available in Black color.
Zoom Method
Sigma 24-70mm F2.8 DG OS HSM features Rotary (extending) zoom method where the length of the lens changes as you zoom in or out. This makes it possible to design the lens with a smaller minimum length ( generally when it is zoomed out) compared to internal zoom lenses. The disadvantages of this design are being harder to seal against dust and moisture, weight balance shifting while zooming and zoom creep in certain lenses.
Aperture
Sigma 24-70mm F2.8 DG OS HSM is a fixed aperture lens with a constant max aperture of f2.8 from 24mm all the way to the 70mm .
Optical Formula
Sigma 24-70mm F2.8 DG OS HSM's optical formula consists of 19 elements in 14 groups. Following special elements are used in this design:
- Three HLD
- four aspherical elements