Excerpt: Overall good product. I replaced my Canon 100-300 with this lens. This lens has better contrast and color than the Canon. Only down side so far is it has a hrd time focusing in low light sometimes.
Excerpt: Took it along for a hike, and I was able to really zoom into some chipmunks munching on some snacks. The focus was quick, and loved that the focus motor was all internal. Knocked one star off because I found in a few occasions where it couldn't grab focus when a tiny bird was in between a bunch of branches.
Pros: Durable, Easily Interchangeable, Fast focus, Great price
Excerpt: After many hours of research I decided to go with this lens. I would love to go for an L-Series telephoto and this lens does not compare in my experience with both, but with a limited budget I am very pleased. So far I have not had any issues. I have been taking many action shots, and have not had problem with the AF speed, and it is definetlly worth the extra money to got for the VC(IS) option.
Summary: Why I own the Tamron 70-300 and the Canon 70-200 f/2.8L Mark II with 1.4x/2x Mark III: I am a professional nature photographer. In the 70-300 range I usually use the ridiculously expensive and heavy Canon 70-200 Mark II with 1.4x/2x Mark III. These recent versions are a significant improvement over their predecessors and are the best for me and my Canon 5D Mark III.
Excerpt: I am still working out if I like it or not. It does take pretty nice pictures and from all of my weeks of researching, there seems to be nothing better in the price range. One thing that it has that you have to consider is that it has full time manual focus. If you don't know what that is, it means you can use the auto focus and manual at the same time, without flipping a switch. It's front focus ring also does NOT rotate when you focus.
Excerpt: I gave this lens 4 stars... The pictures & lens quality is better than I expected. It is a little heavier than I expected. If the lens was lighter, it would have received 5 stars. I would definitely recommend this lens despite it being a little heavy.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction