Excerpt: I tested this lens using an "eye chart" type target, and was very impressed. It is tack sharp at a wide range of f-stops and focal lengths. The auto focus is quick and accurate. The IS seems to work well (I have no way of quantitatively testing this).
Excerpt: I have little to add to my 5 star review that others have not already covered. The build quality of the lens is wonderful and inspires confidence. End-to-end zoom is a 3/4 turn of the zoom ring which is smooth and almost effortless.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Rugged, Strong Construction
Excerpt: Outdoor and Wildlife Photography. Lens has done great in all outdoor conditions. I shoot a 7D and the video has been good, hard to move and focus while shooting. <--(only Con I have) Was contemplating between this and the 2.8L IS II and have been satisfied with my decision thus far.
Pros: Consistent Output, Durable, Fast / accurate auto-focus
Excerpt: I use it for Outdoor and Wildlife Photography.The Clarity it provides to the Photos cannot be explained..its that much BEST. As far as I have used, I do not have anything to write which are not great about it...I might come across in the long run, which I am not expecting with Canon Quality
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Strong Construction
Excerpt: I shoot wildlife of all kinds, including birds. Birds move at the speed of light and I was looking for a lens that could move quickly, autofocus instantly, so I could get the shot. I love the speed of the autofocus. It's fast. I'm older (67) so I'm not as "stable" as I used to be.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Lightweight, Rugged, Speed Autofocus, Strong Construction
Excerpt: This lens is incredible in every way - super sharp, great DOF, and much smaller and lighter than its f2.8 counterparts. However, in the end it could not compete with the speed and new optics of the f2.8 ver2, so I returned it and made the upgrade.