Excerpt: I am a hobby enthusiast with a primary love of nature photography, with a special interest in wildlife / bird photography. Furthermore, I really demand sharpness in my images. Although this lens doesn't quite have the reach of a 400mm (or longer) lens, the 70-300L IS comes close. I have been using it on practice shoots with a EOS 70D and the combo has demonstrated very fast and accurate focus yielding images that are sharper than I could have hoped.
Pros: Consistent Output, Fast / accurate auto-focus, Lightweight, Rugged, Strong Construction
Summary: This is my first 'long' lens (I have the 24-105 canon L which is great). Of course I needed a bit more reach than that one could provide. I looked at the Canon 70-200 lenses, but I really did not think that 200 would be enough, so I decided to try the 70-300 instead. I'm glad I did. #1 - Even 300mm is 'just' long enough. 200mm would NOT have been enough of an upgrade. #2 - This is an AWESOME lens.
Excerpt: Excellent lens for me as an amateur photographer to use on vacation as a good all around lens. Nice sharp images, better than my old Canon 70-300 IS USM. <br />I do wish it was not an off white lens. It screams look at me when it comes out of the camera bag. Not exactly a plus when taking street or crowd scenes.
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction
Excerpt: This lens is a perfect compliment to my 24-105mm lens on my 6d. While it may not have the low light capability of the f/2.8, it works great for action shots outdoors (why I bought it) and is tack sharp. I also like the extra 100 mm it provides over the 200 mm length. The overall length of the lens itself is a nice feature as well, allowing for packability on backpacking or ski trips. Overall I'm very satisfied.
Pros: Durable, Fast / accurate auto-focus, Nice Bokeh, Strong Construction
Excerpt: As a serious amateur, this lens has been my only long lens for over a year. I would trade my camera before I traded this lens. It brings me close to wild life in sharp detail. My shaky hand is usually compensated for even at 300mm.
Pros: Consistent Output, Durable, Easily Interchangeable, Nice Bokeh, Strong Construction