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Sigma 18-50mm F/2.8 EX DC Lens for Canon Digital SLR Cameras
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- Large aperture of F2.8 throughout the entire zoom range
- A minimum focusing distance of 20cm (7.9") and a maximum magnification of 1:3
- Making it ideal for close-up photography
- Specially designed to suit the characteristics of digital SLR
- Lens provides a high level of optical performance
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|Item Dimensions||5.2 x 5.5 x 5.7 inches|
|Item Weight||3 pounds|
|Maximum Focal Length||50 mm|
|Minimum Focal Length||18 mm|
|Shipping Weight||1.15 pounds|
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Top Customer Reviews
Canon 50mm/1.8 (my reference standard for the best lens performance I can reasonably expect)
Canon 28-135 IS
Canon 18-55 EFS
I have found that the Sigma 18-50/2.8 is the lens I keep on my camera most of the time. It has very good color, contrast, sharpness, saturation, and low distortion and aberration. By contrast to the 18-55 kit lens that came with my camera, the Sigma is in a whole different class. I would compare it favorably with my Canon 28/2.8 prime lens. I have never used a prime lens wider than 28mm, so I can't speak as to what the distortion is like at 18mm compared to a prime, but in general I am very pleased with the Sigma.
I find it has better dynamic range than the Canon 28-135 did; I can get better textures and ranges of intensity.
For the highest quality, I always go to my Canon 50/1.8, but in walking around and general shooting, I use the Sigma.
I was interested in the Canon 17-40L, but from what I have seen there is not a lot of difference in the quality from that lens and this one. Perhaps a little less distortion, but nothing you would notice unless you are taking pictures of brick walls.
Cost, however, is what drove me to this lens. Due to financial constraints, I could afford no more than $500 for a lens for my 300D, which knocked the Canon L-series glass out of contention. After looking at the Tokina and Sigma 28-70 F2.8 lenses, I discovered this lens was in the pipeline and held out for it.
It's not a replacement for the Canon L-Series lenses. That's the bad news. The good news is that this is possibly the PERFECT advanced amatuer lens. Good optical quality, though a little soft at F2.8. Focuses quickly, and "wanders" less than other EF-mount lenses I own (18-55mm EF-S kit lens; low-end Sigma 28-90). The wide aperture allows for auto focusing in what feel like "no light" situations.
Quick focus, little focus "wander", good build quality, included sunshade and case, relatively light weight and small size
Works only with APS-C image sensors, a little soft at F2.8
The corners are not as sharp as the center, especially in wide angles. Outside of the center, the 18-50 is also prone to chromatic abberations/fringing but not worse than almost any other lense. Barrel distortion is present at 18mm but much better than the competition (ie, the 17-40L and 17-85 IS).
Color saturation is good- not as impressive as the Canon 17-40 but still perfectly adequate and very good with a slight software sharpening boost.
The only true negative I have found is a propensity for light lens flare. Even when the sun is out of frame by 20 degrees, flare can still occur. (note that this flaring is not major, and I have often not even noticed it until the second or third time I come back to a picture) I have also noticed flare from street lamps in 10+ second night shots. The lens comes with a decent hood (as well as a pretty nice soft case) in order to help prevent flares. However, I have noticed flaring in cases where the sun was so indirect I never would have thought to attach the hood. The lens cap also cannot be accessed while the hood is on, which is a frustrating design quirk. While, even in the best lenses, flare is not totally avoidable the 18-50 flares much more frequently than other lenses I have used.Read more ›
Most Recent Customer Reviews
As a professional wedding photographer I have owned many cameras and lenses. I've always chosen my equipment carefully, wanting both performance and value. Read morePublished on October 13, 2009 by Robert Marcos Studios
This Sigma is a nice everyday lens. It produces sharp & contrasty images, excellent build quality, fast AF, and smooth zooming. Read morePublished on August 6, 2009 by Life is good, too
I use this lens with a Canon D400 (Rebel XTi), and I'm pretty happy with the results. Most people would not be able to tell the difference between a picture taken with this lens or... Read morePublished on January 25, 2008 by P. Gimenez
Great price for a great walk around lens.
Great macro shots
Easy zoom from a wide angel to 50mm for a portrait shots. Read more
I currently own this lens. It's a great all-purpose lens and I think it's very fresh even at 2.8. Razor sharp from f4-f11. Very comparable IQ to Canon L lenses. Read morePublished on January 27, 2007 by Adam Czap
I bought this lens with my Canon Rebel XTi. The default lens that came with the camera was very bad (EF-S 18-55mm f3.5-5.6). Read morePublished on September 19, 2006 by GM