I bought this lens to use on my Canon 5D2. Feels like a well balanced fit on the camera. Produces sharp images with great background blur. Have had it a week and have no even used the flash with it yet. Expensive - but you get what you pay for....

Build quality; Sharpness; f1.2; low light shooting without flash

Expensive

I used to work 50 mm - it is very convenient. I like the artistry and sharp picture on the f1.2. Background - water color, sharpness - the schedule. minus - pulling edges.

So far, I am a believer in this lens. It does what I expect it to do wide open, which is deliver dreamy, creamy imagery. Stopped down it is amazingly sharp, colorful and contrasty. It is worth the money in my estimation.

So far; this lens does what I expect it to do; love the bokeh

some CA wide open; price is very high

It's bokeh and overall quality is magical. It is not comparable to the 1.4 as it has more depth and a different look. People constantly try to compare, but this is a different beast!

Durable; Nice Bokeh; Strong Construction

Heavy; Slow Focus

This is a high-quality lens that definitely deserves the "L" series designation from Canon. Extremely sharp, amazing color, and beautiful bokeh. The only issue I had was that the auto focus was slow and would hunt a lot.

Superior image quality; beautiful bokeh

Slow auto focus; price

There's no getting away from it.... A 50mm lens is a necessary tool. A standard "Normal" lens for many years, it is great for those times when you don't need the capabilities (and weight) of a zoom lens. This lens is ultra-fast and ultra-sharp! I've been wanting this lens for a very long time.

Yes, I would recommend this to a friend

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

Expensive; Heavy

This is a fantastic lens to use for achieving a very shallow depth of field and a dream like quality to images. It's very easy to photograph something which appears mundane and get an image which is visually very pleasing.

Durable; Easily Interchangeable; Good Quality; Great Bokeh; Strong Construction

Expensive; Heavy

I really wish Amazon would not lump reviews for different products variations in the same listing. The lens I am reviewing is the f/1.2 version...not the f/1.4 or the f/1.8 I have been using this lens for about a year now and it performs like no other lens I have ever owned.

This lens simply is not sharp at f1.2. I tested using Spydercal, tripod mounted EOS 1DS camera with electronic shutter release at of 1/1000 sec but still not sharp at f1.2. Very sharp at all other apertures but no good at wide open. Defeats the purpose of buying fasdt glass if it cannot be used.

Superior build quality