This thing blows the canon 1.4 and 1.8 out of the water. Solid build, reasonable fast auto focus and great low Light performance. This was my first sigma lens and I may consider upgrading it to the new 50mm model down the road.

Let me start by explaining my score of 4 on image quality. If I had the option I would give it a 4.8 rather than a perfect 5. When the aperture is wide open at f/1.4 images get 'creamy all over'. But with the right light this effect can be absolutely stunning!

Bokeh; Focus Speed; Sharpness

77mm filters

I bought this lens mainly for portrait photography. I like it better than the canon version. I checked the reviews and photo samples of this lens and I must say, it's true enough that it is a nice lens.

If you are looking for a new lens for your Canon DSLR camera, whether it be a full frame (like the C

Big glass that lets in lots of light!

A bit on the heavy side; but really no problem

This is the first Sigma 50mm f/1.4 prime lens for 4/3 DSLRs, a tele photo lens in the focal length of 100mm equivalent to portrait lens in medium distance. A superb lens of optical quality and design, fast focus in silent with HSM.

Fast aperature in f/1.4 with beautiful bokeh; Short lens barrel and well balance of weight by hand-held with camera body; Fast focus speed in silent with HSM

I use the lens mainly for low-light and night photography in the Yorkshire Dales. It's immensely heavy for a 50mm lens, but the optical quality is outstanding - pin sharp from corner to corner from f2 upwards. I don't mind the extra weight when I can get such high quality images.

Consistent Output; Durable; Rugged; Sharp Focus; Strong Construction

Heavy

This is an excellent lens, with crisp and clear imaging. Made of solid materials, this thing feels nice in hand and on camera. I was a bit put off by the chunky lens cap, but I usually replace those anyway. Other reviewers have written detailed reviews, so I won't get into that here.

I was scared after reading reviews that it has some back focus problem... but it was fine! Plus, if there's any problem, you can always return and get a new one.

Consistent Output; Durable; Easily Interchangeable; Nice Bokeh; Rugged; Strong Construction

Heavy

This lens has opened some doors for me with its f1.4 capabilities. I was trying to decide between this and the two more affordable canon 50mm lenses. Ultimately I sold myself on this output quality from this lens.

Low Light; Nice Bokeh; Rugged; Sharpness; Strong Construction

Inconsistent focus

Bought this lens for the great bokeh and sharpness. I tried it on Nikon D700 and quiet happy with a result. The glass is heavy and massive ,but the filling is right on.Fast and furious :)