With its wide zoom range, the lens has a focal range equivalent to 25.5-105mm on a 35mm lens. Thanks to SIGMA's latest technologies, it's exceptionally lightweight and 30% more compact by volume than previous lenses of its type. Its low F-number equips photographers to shoot subjects at extremely close range, making this the perfect lens for travel, family photos, artistic compositions, and many other uses. A complement to uncompromising optical performance, functionality, quality, and elegance, the compact size of the lens makes it ideal for everyday use. It is highly beneficial to photographers that the lens they use the most is one of the best in quality they have.
Sigma DC 17-70mm F2.8-4 Macro OS HSM - Canon Fit
Lens construction 16 elements in 14 groups Minimum aperture F22 Filter size φ72mm Angle of view (DC) 79.7° - 22.9° Minimum focusing distance 22cm / 8.7in. Dimensions (diameter x length) φ79mm × 82mm /
φ3.1in. × 3.2in.
Blades 7 (Rounded diaphragm) Maximum magnification ratio 1：2.8 Weight 465g / 16.4oz.