I'm a photographer by profession. I've used 50mm primes from Canon, Nikon, Sony, Pentax, Olympus and Sigma. But nothing can even come close to what this lens can do. Pros: 1. Super fast focusing 2. Silent while focusing 3. Extremely sturdy 4. The most important thing. F1.2 man!

If you are looking for a 50mm lens with beautiful bokeh, good contrast/color at wide open, and you want to use f1.2, for low light photo AND video, this is the one for you.

Beautiful Color; Durable; Fast / accurate auto-focus; Grea Picture At Wide Open; Nice Bokeh; Rugged

Expensive; Sometimes Miss The Focus

Yes it is expensive but you really won't remember that once you use the lens. The speed allows for many more good shots without the use of any flash. Highly recommended.

Consistent Output; Durable; Easily Interchangeable; Quick Focus; Rugged; Sharp Focus; Strong Construction

Expensive; Heavy

I've been putting off purchasing this lens for a while because of it's back focus (focus shift) problem which occurs only when photographing at extremely close distance using the center focus point of the camera.

Upgraded from the 50mm 1.4. Love love love this lens. Pictures are always sharp unlike the 50mm 1.4 which is very soft at 1.4 to 1.8. A Necessary evil I shoot a wide variety of subject matter for my work and, because I exclusively use full frame Canon bodies and always try to use prime lenses, a...

Pros: Durable, Fast / accurate auto-focus, Strong Construction, Consistent Output Cons: Other thoughts: I bought this lens for portrait photos mainly, I love this lens,it gives beautiful results, I borrowed a sigma 1.4 50mm prime lens from a friendbefore purchasing this one and the canon is a bit...

I'm a professional wedding/portrait photographer and a prime lens shooter. This lens was worth the upgrade from the 1.4. It's quiet and fast! Worth every penny.

Consistent Output; Fast / accurate auto-focus; Nice Bokeh

Heavy

I upgraded this lens from my 1.4 for a trip to France where I assumed (correctly) that flash would not be permitted in museums and churches. I am extremely happy with the images captured; I have great images inside the Notre Dame Cathedral in Paris while all those around me were struggling with...

Fast auto-focus; Superior build quality; Super-sharp images

not cheap

Good: Solid build. f 1.2 . Best bokeh. Quiet. Bad: Not sharp as other lens. Price. A little heavery.

I've had this lens before and as soon as I sold it I began to regret it, so I purchased another one. Aside from its ability to capture very low light exposures, this lens excels because of the "look" it renders. It was designed to be shot wide open and that's where it shines.