Excerpt: I have used this lens for wildlife shots so far and it is working very well. Much better focus than my previous lens and not too heavy. I haven't needed a tripod at all. Wonderful optics. Focusing makes some noise, but not bad. I use this with my Canon 7D. Can't wait to do some portraits with it!
Excerpt: For those of us who do not need the Canon 70-200 F/2.8L IS USM lens, this lens is a 'no-brainer'. It performs 95% as well as it's F/2.8 brother, but is also 1/2 of the weight and almost 1/2 of the price of the F/2.8.
Summary: Almost perfect "walk-around" lens unlike its f/2.8 big brother. I use it with a 24-105mm f/4 IS lens when out and about and I have coverage for almost any "normal" focal range. Tack sharp in almost in any lighting from daybreak to sunset. Gets my highest recommendation.
Excerpt: I use this lens mostly for moon, wildlife, birds, deer and such, some landscape. It is good for portraits if outdoors. It has a fast focus. I have had this lens for only 6 months or so and I am still happy with it. I hope to upgrade to a 300mm L IS soon.