Love using this lens. It really has increased my overall use of my DSLR. I am able to take photos from a distance and really capture a natural shot since I don't have to be close to the object. Overall I am very happy with this lens. Would recommend to any starter using a DSLR.

Durable; Fast / accurate auto-focus; Strong Construction

Heavy

Great Lens would love a more expensive one f2 is usm ..but this is great very good lens for the money

Great for outdoor sports and other daytime activities. Decent in lower light settings such as nighttime sporting events.

Excellent Zoom Quality

Slow in low light

I bought this lens on sale, other wise I would not have purchased it. I take pics of birds and my results with this lens were disappointing at best. I was previously using a 55-250mm IS ll at half the cost and the results were spectacular by comparison.

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

"In this zoom range there are many lenses to compare and it wasn't an easy decision. For me it came down to this lens or the 70-200 f/4 L IS USM and after trying both in the store I went with the 70-300 .

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.

If you're on a 1.3x or 1.6x crop body (the XTi for example) will give you 112-480mm, which is nice for the extra distance, however, if your wanting to be up with your family and friends and get full body shots you have to be standing quite far away.

Excellent image quality while not an L series lens with a wide aperture it still rocks in cloudy/low light conditions; I've taken 2,000+ images with this lens and it has not let me down

Louder auto focus than other USM lenses, not by a lot though; Autofocus hunts in lowlight at 300mm