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Sigma 24-70mm f2.8 EX Aspherical DG DF

Review Date: Dec 17, 2006 Recommend? yes | Price paid: $465.00 | Rating: 9 

Pros: Price, built quality, image quality
push-pull manual focus, somewhat soft at 2.8

I received a bad copy of this lens (front focusing) and decided to save my review until it was fixed. When I received it back from Sigma, it was perfect. This lens is sharp and has very good contrast. I know the focusing is a little slower than lenses without HSM (USM), but not as slow as some would lead you to believe. The focus noise has not been an issue for me (and I shoot at church events). The minor quirks about this lens are just that, minor. The lens really wins when you consider that it's Canon equivalent is about $800 more. That makes this lens a great value. I had a chance to shoot the same subject in the same lighting, with the same camera with both the Sigma and Canon versions of this lens. The Canon version had the edge over the Sigma by a very slight margin (not enough to justify the price difference). Before I saw the results, I was all prepared to sell my Sigma and purchase the Canon, but the image quality is so close that I decided to spend the money on another lens. I recently took this lens on vacation on a cruise, and the pics from it are just fabulous. If I were a professional and required every little edige that I could get to take good pictures, I would have purchased the Canon, but since I'm a amateur who just enjoys taking pictures, the Sigma is a terrific lens for the money. If you are a person who simply enjoys taking and sharing pictures instead of a pixel-peeper, then this lens is certainly worthy of your consdieration.

Sigma 28-70mm F2.8 EX Aspherical

Review Date: Dec 31, 2005 Recommend? yes | Price paid: $380.00 | Rating: 9 

Pros: Color rendition, sharpness, price when compared to the Canon model
soft at 2.8, had to be sent back for recalibration to use on my 20D

I purchased this lens because the Canon 24-70mm L was way out of my price range. I did a lot of research and read a lot of reviews on alternatives such as the Sigma 24-70mm and the Tamron 28-75mm. I chose the Sigma. When I got the lens, I noticed some focusing issues, and sent the lens back to Sigma for re-calibration. Now that I have the lens back, I don't regret the purchase at all. It is a little soft wide open (but I have read this problem about other lenses, and it seems to be a common issue with fast zooms). When stopped down, this lens will produce gorgeous results at a fraction of the cost of the Canon 24-70mm. This lens is a must have for anyone wanting to take great pictures, but can't spend the $$$$ for the L.