One of the greatest lens I've ever used. I had the f/1,8 FD version, which was already stunning, but this new model is even better, especially wide open. And the stabilizer is a great addition. To improve this lens, I can only think about a shorter minimum focusing distance. Other than that, this lens is just perfect from every point of view, regardless of the diaphragm, the lighting or the distance of focus. Bokeh is very beautiful.

Fast focus, great sharpness, great overall image quality. This is an absolute dream if you use it for Portraits.

Money shots every time!

This has got to be Canons best lens ever produced..I shoot motocross 99% of the time but did not want another 300 F2.8 because how limited I found it shooting the big races with 30 other media people.I ended buying this lens (200 f2 IS) and all I can say is wow wow wow! People ask why I didnt get the 200 F2.8 thats only $600 compared to 5k well its simple that lens does not produce the results you get with this lens.This lens is so fast you can hardly even believe it, the colors, contrast and Bokeh are 10/10..Ive had all of Canons top sports lens and this is by far my favorite. Throw a 1.4 extender on it your still at f2.8 300+ mm..Its like 2 lenses in one..Indoors this things is simply amazing, I took some shots of my baby girl inside at 2.0 with very limited light and I just could not believe the results.This lens I will keep forever, if your on the border and cant decide if you want it or not just DO IT you will not regret it.

I've used this lens to shoot ice hockey at all levels including prep, college, USA Hockey, OHL, and NHL for many years. Despite its weight, the results are simply addicting.

Prior to purchasing this bad boy, I was shooting hockey with the 70-200mm f2.8 and thought I was getting good results. Boy, was I in for a surprise! After renting the 200mm f2.0, I was immediately stunned to see just how sharp and bright my images could be. Problem was that I (and my customers, editors, etc.) became addicted to this sharpness and eventually compelled me to buy it.

Now, along with my 1DX, I've shot this lens from hundreds of penalty boxes and stadium perches and, if I'm limited for space (so I cannot bring my 300mm f2.8 II), from concourse level with a 1.4X extender. I highly recommend this lens and cannot imagine shooting hockey without it.

color , sharpness , focus speed , resolution are top class .
i could not find a flaw in this lens .
very hand holdable and I.S. is what makes this lens unique . i have tested shooting shooting handheld at 1/5" with good result .
from portrait in ambient low light to early morning first light photography this lens has proven it's capability in delivering what i expected .

Superb, top of the line, extremely clear, easy focus, great photos

This lens is awesome. I bought it for shooting sports in low-light and it is living up to my expectations. Lens is sharp and focus is fast. And it works great with the 1.4x Extender. The lens is heavy, about the same size as a 300/2.8.

Beautiful lens! It arrives in a mini suitcase lol

My intended use for this lens is low light sports photography and environmental portraits. Fast focusing, moderate weight and superb resolution are all rolled up in this not so little gem. Excellent Bokeh when used at 2.0