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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
Product Description
To maintain high optical performance from infinity to close-up 1: 1 (life-size) macro photos without accessories, the new Sigma 50mm f2.8 EX incorporates a “floating” element focusing system. Designed as a quick-focusing macro lens the AF speed of 50mm, f2.8 EX Macro is 1.4 times faster than previous 50mm f2.8 macros. It features a non-rotating front lens group, which makes it easier to work with polarizing filters and has a focus limiter. The Sigma 50mm f/2.8 EX Macro lens also features the new deluxe EX external finish. A handy screw type metal sunshade makes it easier to rotate a polarizing filter.
Sigma 18-50mm F/2.8 EX DC Lens for Canon Digital SLR Cameras
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Great price for a great walk around lens.
Light weight
Great macro shots
Easy zoom from a wide angel to 50mm for a portrait shots.
Sharp pictures.
Rating: 5 / 5
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 with a Canon L lense That said, the built quality is not as good as Canon L lenses.
For about half the price (or less), I strongly recommend this lens unless you are a pro and have the money to spend. In that case, go for the Canon 24-70 mm 2.8 (L) or the Canon 16-35 mm 2.8 (L).
Rating: 4 / 5
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). I don’t recommend it to anyone, it is really a waste of the camera’s capabilities, and the pictures you get may not be as good as that from a point and shoot camera.
I am very happy with the Sigma lens. I love the f2.8 feature as it makes indoor pictures (w/o flash) much better. The pictures are pretty sharp in general (especially around the focus point). Beware that taking pictures at f2.8 can be tricky, i.e. while the image center is in focus, the edges and other more distant points may be not be (try increasing the f number if there is sufficient light).
There are three lenses in the market with comparable price & performance: Sigma 18-50mm f/2.8 EX DC, Tamron SP AF17-50mm F/2.8 Di II LD and Canon EF-S 17-85mm f/4-5.6 IS USM. Sigma is the cheapest and the other two are a bit more expensive.
I’ve just compared my Sigma with a friend’s Canon today. The picture qualities were almost identical. Canon was a bit sharper due to Image Stabilization, but f2.8 in Sigma compansates for that. Overall, the picture qualities were very very similar. Canon has a slightly wider range of zoom, but I don’t know if it worthy of $150 price delta. The barrel distortion at 18mm is noticeable with both cameras.
The reviews I read online indicate that Tamron and Sigma lenses are pretty similar, although the reviews for Tamron are a bit better. I haven’t tested the Tamron yet.
I haven’t had any focusing issues with the Sigma. It takes a while to get used to auto-focus function in Rebel cameras and perfect focusing is not 100% guaranteed. But that’s true for any lens. You just need to learn how to do it.
I am aware of only one lens which is considerably better than the Sigma: Canon EF-S 17-55mm f/2.8 IS USM. That lens really rocks. Its colors are more saturated and it is sharper due to IS. However, it is _very_ expensive. If you cannot afford it, one of the three lenses above can be your choice. Sigma offers the best value among three, and it has pretty good performance.
Rating: 5 / 5
I so very much wanted to use this lens. I actually tried two of them here from Amazon. The first one simply could not autofocus on pretty much anything. If I manually focused the images were really very nice. Good sharp lens. The extreme corners are a bit soft and don’t really sharpen up until about f/8. There is quite a bit of chromatic aberation at 18mm. The performance seems quite acceptable for a wide angle lens of this type. Unfortunately, since it could never really autofocus it wasn’t very useful, so I exchanged it.
The second copy worked quite a bit better, optical performance just like the first and autofocused better. But it just could not autofocus on distant subjects at wider focal lengths (wider than 28mm). It had occasional trouble on near subjects. It was easy to verify it was the lens and not the camera as I had a Canon 18-55 and a Canon 17-40 to compare to. So this second copy got sent back for a refund.
This would be a five star lens if I had gotten one that worked. Great size and weight for what it does. Unfortunately Sigma appears to have some bad quality control problems. If you are going to give this lens a shot there is no better place to get it than here at amazon since the price is great and the exchange policy for defective goods is excellent.
Rating: 2 / 5
As a professional wedding photographer I have owned many cameras and lenses. I’ve always chosen my equipment carefully, wanting both performance and value. Although I used primarily Nikon products, I have purchased several Sigma lenses over the years, mainly because they cost much less than Nikkor lenses. Unfortunately you get what you pay for. This year I’ve had two Sigma lenses fail. Both were less than three years old. The first had an autofocus problem. The second, an 18-50mm f2.8 EX, had an aperture failure. Since the warranties have expired I am now expected to shell out $180 to have each lens repaired.
I think a product which has been well maintained should last longer than three years.
Rating: 2 / 5