Summary: Purchased in 2013 for a trip abroad. It worked very well for a while. Compact and light compared to Nikon equivalent. FX lens was what I was looking for. Now, in 10/2015 on my Nikon D810 has lens focus chatter at short distances.
Lens has a loose screw and gets stuck in different zoom positions
elle starkman, Amazon
18 November 2012
Summary: This appears to be a common problem with this lens. I should have bought it brand new considering it will now cost money to open the lens and fix the problem. It's probably the reason it was sold in the first place.
Summary: I just got the lens yesterday from the port agent where i address the package because i work on the Cruise Ship, the lens is very disappointing because of its bad quality, blurred and soft image.
Excerpt: I was looking forward to having a nice walk-around or "vacation" lens for my new Sony Alpha 580 camera. I was extremely disappointed in the quality of this lens. It's being returned. I don't know if I got a bad lens, or if this is the normal quality of the lens. It was very "soft" throughout.
Summary: When I rated this lens I factored in the photo quality AND the service provided by Tamron. I use it on a Nikon D800 and find the sharpness acceptable. What I don't find acceptable is the way Tamron handles their warranty. I have had this lens for 5 years. The warranty is 6 years.