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Sigma 10-20mm F4-5.6 EX DC HSM

Review Date: Feb 11, 2006 Recommend? yes | Price paid: $480.00 | Rating: 10 

Pros: Superb Resolution. As sharp as my 50mm 1.8 and 85mm 1.8. Great wide open, fast AF, HSM wish full-time Manual focusing. Very usable distance scale. Great Lens Hood. Includes case and hood with 3 year warranty. Usable filter threads. Nice and WIDE. My best built lens: makes my 85mm look flimsy. More affordable than the Canon 10-22mm
No DOF scale. Slow f/4-5.6. The lens cap is hard to put on with hood attached.

This first thing you realize when you pull the Sigma 10-20mm f/4-5.6 out of it's box is that it's built like a tank. It comes in its very own zippered case and has the lens hood included. Upon attaching it to the 20D, it feels perfectly weighted. It is just right for the 20D. On a 350D or 300D, it may feel a bit heavy. This is by far my best lens overall in terms of quality of build and photo results. The 10-20 is a slow lens. Thanks to the low noise of the 20D however, this becomes much less of a problem. Frankly, at this length, speed is always a compromise. If photographers absolutely HAVE to have a 102 Degree FOV with an f/2.8 aperture, they'll need to shell out about $4000 trying to upgrade to the 5D and a 16-35L. This lens is great at f/4.0 @ 10mm. and spectacular at f/5.6 at all lengths. I usually just shoot in Av mode with aperture set wide open. Stopping down to f/8.0 at 10mm increased DOF greatly. Shots at this aperture will look sharp all around. The AF is nice and fast but I even find that shooting in MF is more desireable with such a wide lens. basically any object past about 3 feet is pretty much at infinity focus.(LOL the min. distance of my 85) The only real peeve that bothers me is the lens cap. With the hood on, it it almost impossible to remove or attach the lens cap. Sigma should have included a cap with a centered release pinch on rather than the side pinches. After some getting-used to the cap design becomes less annoying. This lens will never leave my bag. Check out the PhotoZOne lens tests at for all the technical crap about this lens. After owning this lens, Sigma will now always be a consideration when purchasing new gear.