The Super Multi-Layer Coating reduces flare and ghosting as well as providing sharp and high contrast images throughout the entire zoom range.
Fast and quiet AF
The lens incorporates HSM (Hyper Sonic motor), ensuring fast and quiet AF.
Lens construction
Lens construction
17 elements in 13 groups
Angle of view(DC)
79.7 - 31.7°
Number of diaphragm blades
7 Blades (Rounded diaphragm)
Minimum aperture
F22
Minimum focusing distance
28cm / 11in.
Maximum magnification ratio
1:5
Filter size
⌀77mm
Dimensions (diameter × length)
⌀83.5mm×91.8mm / 3.3in. x 3.6in.
Weight
565g / 19.9oz.
Corresponding AF Mounts
[SIGMA 17-50mm F2.8 EX DC OS HSM] SIGMA / CANON / NIKON
[SIGMA 17-50mm F2.8 EX DC HSM] SONY / PENTAX
DC lenses have an image circle that covers APS-C size image sensors. Not for use on digital cameras having image sensors larger than APS-C size or on 35mm or APS film cameras, as vignetting will occur. The angle of view varies depending on which camera the lens is mounted on. To find the 35mm camera-equivalent focal length, multiply the DC lens focal length by the crop factor (digital multiplier) of 1.5, 1.6, or 1.7, depending on the brand of DSLR camera on which the lens will be used. To find which DC lens is equivalent to a full-frame lens, divide the focal length of the full frame lens by the same crop factor. Sony and Pentax mounts are not incorporated with OS function. AF will not function with Pentax ist* series and K100D DSLR cameras that do not support HSM. The appearance and specification are subject to change without notice.