Good lens if you get a good copy. If you don't have a 7D or 50D make sure you read this.
D. Poller, Amazon
31 July 2012
Summary: If you have a 1.6 crop Canon EOS camera, this is a good pick for a prime lens. The images have a natural, smooth (not "soft" but smooth) look, with shallow depth of field when shot wide open. It renders colors beautifully, has excellent contrast and only mild chromatic aberration.
Summary: This is not and L lens, but it is pretty good for the money. I was looking for a prime lens for my crop sensor DSLR equivalent to a 50mm on a full frame camera, this Sigma lens was the perfect combination of price, quality and aperture (open wide at f1.4 you will get awesome bokeh).
Summary: The lens really produce a great image especially in low light. The quality of the picture is very high and the price is very cheap with this level of aperture (f/1.4). The 30mm is the best distance to take person or small group pictures during dinner when the light is very dim (which we do most of...
Excerpt: Don't know if I had a bad copy but the lens always wanted to be at f1.4 even with flash, even in bright daylight. I though it was my camera's metering system but all my other lenses worked fine. The bad part is my copy was horrible wide open.
Excerpt: Very well built, and it's the only affordable f/1.4 lens for APS-C cameras. Wide open it's very soft, somewhat "dreamy" (fine for portraits though), and the corners remain a bit soft at all apertures. The centre and most of the frame are very very sharp starting from f/2.8.
Summary: I just requested a return from Amazon for this lens. As always, Amazon rocks. Here's my two day experience with it attached to my Canon T1i: I bought this lens wanting more light/speed and a more natural focal length compared to my Canon 50mm 1.8 (cropped sensor).
Excerpt: You're probably getting this lens because you don't have the money to get the Nikon version...guilty as charged. It's really slow to focus -- FORGET night photography....it wont catch. In my case, i can't see well at night so it sucks, but basic portrait photos are fine with this lens.