• Minimum focusing distance of 7.9-inches, maximum magnification of 1:2.3.
• The new multi layer lens coating and lens design reduce flare and ghosting.
• Aspherical and SLD lenses, offer excellent correction for various aberrations.
• The lens offers a large aperture of F2.8 at wide angle.

It can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor.

This lens has a minimum focusing distance of 7.9-inches (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range.

This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2-inches) and diameter 79mm (3.1-inches). It performs superbly even in relatively low light conditions indoors or at dusk.

The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with Zoom Lock Switch that eliminates Zoom Creep during transportation.Amazon.com Product Description
Designed for Canon digital SLR cameras, the Sigma 17-70mm f/2.8-4.5 macro lens performs superbly even in relatively low light conditions, such as indoors or at dusk. The lens incorporates an inner focusing system that provides a fast autofocus speed while also preventing the front of the lens from rotating. This makes it particularly suitable for use with circular polarizing filters and petal-shaped lens hoods. The lens is also equipped with a zoom lock switch that eliminates “zoom creep” during transportation. And thanks to the special low dispersion (SLD) element and two aspherical elements, the lens corrects for all types of aberrations and produces a high level of optical performance throughout the entire zoom range. Other features include a minimum focusing distance of 7.9 inches, a maximum magnification ratio of 1:2.3, and a multilayer lens coating that reduces flare and ghosting. All Sigma lenses carry a one-year warranty.

Specifications

• Focal length: 17-70mm
• Maximum aperture: f/2.8-4.5
• Lens construction: 15 elements in 12 groups
• Angle of view: 72.4 to 20.2 degrees (Sigma SD format)
• Number of diaphragm blades: 7
• Minimum aperture: f/22
• Minimum focusing distance: 7.9 inches
• Maximum magnification: 1:2.3
• Filter size: 72mm
• Corresponding AF mounts: Canon
• Dimensions: 3.1 inches in diameter and 3.2 inches long
• Weight: 16.0 ounces
• Warranty: 1 year

• Large aperture standard zoom lens designed Specially For Digital SLR Cameras. Macro lens level close up ability
• Minimum focusing distance of 7.9.., maximum magnification of 1:2.3.
• The new multi layer lens coating and lens design reduce flare and ghosting l
• Aspherical and SLD lenses, offer excellent correction for various aberrations.
• The lens offers a large aperture of F2.8 at wide angle.

Price : $369.00