I had bought a Canon Rebel T3i just after Christmas....I took it on my vacation in Jan/13 and was very impressed with the quality of the pics....but I wished I had the EF 70-300mm f/4.0-5.6IS USM telephoto lens for the distance shots that I missed...

I have used and using this lens for some time now and it is probably the best lens I have ever used, the image quality the sharpness is excellent, my experience with this lens has been fantastic definitely a must have lens for all canon slr users.

For an amazing telephoto zoom, with terrific image quality and amazing build quality, look no further than the all around performer that is the Canon 70-300L

Amazing build quality; Stunning image quality; Fast and accurate AF; Rock solid IS

Canon doesn't provide a tripod collar with the lens; you have to buy it after

Just came back from the Chesapeake Bay area where I used this lens almost exclusively. (together with the canon5 Marklll The focus is fast, sharp as a tack, and never failed me. What impressed me the most is how true the colors remained even of the farthest objects.

Purchased 70-300L for use on my 7D for daylight field sports, and most importantly, to carry while when traveling. Processed (in Lightroom & NIK Suite) images from the 7D + 70-300L compare very favorably with those from my 5D MkII + 70-200L MkII.

Compact; Light weight; Fast auto focus (with both full and panning modes); Full time manual focus; Very sharp images; Responds well to micro focus adjustment

Cost, but then again it has 'L' build quality and performance; Lens collar is both expensive and (currently) unavailable

I love this lens. The bokeh is nice and the zoom distance is great. My only issue is that when zoomed all the way max the focus is not as sharp as I would like.

This lens has an auto and manual setting for focus adjustments and the adjustments give a good blur effect to the image, very nice lens indeed, very good to have this.

I was looking for a lens that could take shots of wildlife from a distance. This lens certainly fits the bill and the IS helps in low light. I was also looking at the 100-400mm lens but the negative comments about its barrel focusing system pushed me towards this one.

Consistent Output; Durable; Easily Interchangeable; Fast / accurate auto-focus; Rugged; Strong Construction

Heavy; Poor in Low Light

When I purchased my 7D, I also picked this lens up for some wildlife and nature photography. With the cropped sensor, 300mm is close enough for animals that don't want to eat you... I'm impressed. Images are pretty sharp and colorful.

Image stabilized; Superior build quality; Super-sharp images

Slow Auto-Focus

the image stabiliser is the reason I bought the zoom for wildlife,works a treat...