Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras
December 16th, 2009 | 
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- 10-20mm ultra-wide angle lens designed exclusively for Canon digital SLR cameras
- 3 special low dispersion (SLD) glass elements to compensate for color aberration
- Hyper-Sonic Motor (HSM) produces silent, high-speed autofocus; full-time manual focus
- Multilayer lens coating reduces flare and ghost; 9.4-inch close focusing distance
- Measures 3.3 inches in diameter and 3.2 inches long; weighs 16.4 ounces
Product Description10-20mm F4-5. 6 EX DC HSM lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography with APS-C size image sensors of digital SLR cameras. Wide angle of view (102. 4? at 10mm and 63. 8? at 20mm) offers the photographer greater freedom of expression. Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece . . . More >>
Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras
Posted in Digital SLRs & Lenses | 
Tags: 1020mm, 10mm, 20mm, Angle Of View, Angle Photography, C Size, Cameras, Canon, Canon Cameras, Canon Digital, Canon Digital Slr, Canon Digital Slr Cameras, Canon Slr, Color Aberration, Digital, Digital Slr Cameras, f/45.6, Freedom Of Expression, Glass Elements, Image Sensors, Landscape Photography, Lens, Lens Coating, Manual Focus, Sigma, Wide Angle Lens, Wide Angle Lenses
I used this lens for 1 week and took over a 200 photos in various shutter speed/aperture combinations; all of them turned out so-so to no good. The center sharpness is ok, but the sharpness and distortion of the image becomes unacceptable, starting about half-way to the image edge.
I don’t believe I received a bad copy of this lens as a previous reviewer had as I didn’t find one side of the image to be better or worse than the other and the autofocus seemed to be on target.
I have taken nearly one thousand pictures with this camera, anything from architecture to nature. While my initial assessment of the camera was good, after having it for some time, I feel that the fuzziness of the pictures is unacceptable. I guess I felt as though it was my initial settings, or maybe becuase of the wide angle of the lens this was something that was par for the course. I have since read about softness on right or left side with this leans, but my experience is clarity is no good accross the entire frame, in EVERY situation. I will either send back for repair or get rid of it for the cannon 10-22 lens.
I’ve had it a few months now and it’s great. Works great with my Canon 20D.
You get what you pay for. Got this as a Christmas gift for my wife who used it for the first time yesterday for our daughter’s 13th birthday. It was discovered that a shadow was present in all the pictures taken with this lens, starting from bottom center as if the hood cover was getting in the way, yet the shadow was there with or without the hood. . . then we noticed the dark picture when the lens was at full 10mm. I knew there was a hit and miss with this lens before I bought it, but now I wish I would of spent the extra $200. 00 for a Canon.
This is a nice lens. It is well built, and has added some creativity to my shots. No complaints.