Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount) information from Consumer Reports

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Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount)

Price range:

$369.00 - $469.00

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Type: Standard zoom SLR lenses

About - Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount)
The Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount) is part of the interchangeable & SLR lens test program at Consumer Reports. In our lab tests, interchangeable & SLR lenses models like the 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount) are rated on multiple criteria, such as those listed below. Image quality: Image quality is based on tests of sharpness (modulation transfer function), geometric distortion, reflexes within the lens (flare), veiling glare index, vignetting, and macro performance. Image stabilization: An image stabilizer compensates for handheld camera shake. Optical (in the lens) and mechanical (in the camera body) image stabilizers are the best types to use, although some cameras include simulated stabilization, which is considered a less effective type than the others. Modulation transfer function: This is a measure of lens performance and shows how well a lens reproduces object detail in the image it produces.

About - Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount)

The Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount) is part of the interchangeable & SLR lens test program at Consumer Reports. In our lab tests, interchangeable & SLR lenses models like the 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount) are rated on multiple criteria, such as those listed below.

Image quality:: Image quality is based on tests of sharpness (modulation transfer function), geometric distortion, reflexes within the lens (flare), veiling glare index, vignetting, and macro performance.
Image stabilization:: An image stabilizer compensates for handheld camera shake. Optical (in the lens) and mechanical (in the camera body) image stabilizers are the best types to use, although some cameras include simulated stabilization, which is considered a less effective type than the others.
Modulation transfer function:: This is a measure of lens performance and shows how well a lens reproduces object detail in the image it produces.

About This Brand
Sigma makes lenses for its own digital SLRs along with manufacturing lenses with mounts for Canon, Nikon, Sony, Pentax, and Panasonic (Four Thirds) cameras. The company has about 60 lenses in categories including wide zoom lenses, standard zoom, telephoto zoom, wide (fixed focal), standard (fixed focal), macro, DC (for DSLRs with APS-C sensors), and tele (telephoto) lenses.

About This Brand

Sigma makes lenses for its own digital SLRs along with manufacturing lenses with mounts for Canon, Nikon, Sony, Pentax, and Panasonic (Four Thirds) cameras. The company has about 60 lenses in categories including wide zoom lenses, standard zoom, telephoto zoom, wide (fixed focal), standard (fixed focal), macro, DC (for DSLRs with APS-C sensors), and tele (telephoto) lenses.

Features & Specs - Sigma 17-70mm F2.8-4 DC Macro OS HSM (Canon Mount)
Kit bodies The SLR camera bodies that are sold with specific lenses. Kit bodies	Canon EOS 60D
Zoom ratio The zoom ratio is expressed by a value such as 2x or 3x, and describes the relationship between the longest and shortest focal lengths. For example, a 3x optical zoom with a minimum focal length of 18mm would have a maximum focal length of 54mm. Zoom ratio	4X
Bayonet This describes which SLR or SLRs a particular lens is compatible with. It's also referred to as a lens mount. Bayonet	Canon
Weight (oz.) Weight of the lens (without case, pouch or filters). Weight (oz.)	18.9
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