What's this? This is based almost entirely on the lens¿s image quality, based on tests of sharpness (modulation transfer function), geometric distortion, reflexes within the lens (flare), veiling glare index, vignetting, and macro performance. Ease of use was also considered.
About - Tamron SP AF 17-50mm f/2.8 XR Di-II VC LD Aspherical (IF) Lens (Canon Mount)
The Tamron SP AF 17-50mm f/2.8 XR Di-II VC LD Aspherical (IF) Lens (Canon Mount) is part of the interchangeable & SLR lens
test program at Consumer Reports. In our lab tests, interchangeable & SLR lenses
models like the SP AF 17-50mm f/2.8 XR Di-II VC LD Aspherical (IF) Lens (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
Tamron currently manufacturers lenses with mounts for Canon, Nikon, Sony, and Pentax cameras. Sony is a major shareholder in Tamron. The company currently sells more than 20 lenses in four different classes: Di (digital integrated) lenses, Di II (for DSLRs with APS-C sized sensors only), SP (super performance, professional lenses), and conventional lenses. Tamron breaks its lenses down into four general categories: all-in-one zooms, fast zooms, wide and tele lenses, and macro lenses.
Features & Specs - Tamron SP AF 17-50mm f/2.8 XR Di-II VC LD Aspherical (IF) Lens (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
3X
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).
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Kit bodies
