Summary: Great if you are used to manual focus. Let me explain. I have been shooting with all sorts of lenses for the past quarter century and it is really hard for me to "pass" a lens with flying colors. This lens is one that blew me away with it's sharpness, contrast and ability to accurately reproduce color and value. The build is incredible and it feels great and balances evenly. When shooting in manual focus you can be assured of tack sharp results from F 2.8 on.
Excerpt: I purchased this lens as an addition to my other lenses for my business and to use primarily for Weddings, motorsports and other sports photography. The lens performs as good, if not better than the more expensive line of lenses. The only thing that kept this from being rated at 5 stars is the lens seems to creep out of focus in manual mode slightly and auto focus seems to have a hard time focusing in low light situations.
Excerpt: I live on the beach and wanted a little more range and good glass. This is def not a walk-around lens. I've not taken it on the beach but have used it for portraits and shooting some photos at my son's graduation. The aperature is consistent all the way out to 200mm. I've gotten great portrait shots without being in someone's face.
Pros: Great bokah, Large Aperature, Nice Bokeh, Sharp, Strong Construction
Summary: I researched lenses for a very long time. You have to when you are looking at a 70-200 f/2.8. Anyone who has will know that the three main manufacturers for a Nikon D5000 - Sigma, Tamron and Nikon bring different features to the field. Pricing is varied too. Tamron actually is half of the Nikon which was certainly a deciding factor but I was going to spend $900 just because of that.
Excerpt: It's a great lens for the price. The image quality is comparable to a $ + lens and it performs great on my Sony a65. My only complaint is that is the autofocus is a bit slow and should not be used for action shots.
Pros: Consistent Output, Nice Bokeh, Strong Construction