Summary: This lens isn't going to be as great as a more expensive lens but it does a good job. A bonus is the light weight of the lens which makes it more comfortable carrying around while bird watching. Very nice to have the vibration compensation for a lens with long telephoto capabilities while hand-holding it so you don't need to carry a tripod either. So far the photos are in focus and it is compatible with my Fujifilm S5 Pro DSLR.
Summary: We ordered the Nikon version of this lens to have it for a wedding we were attending later that week. It came but it was a day or two before I got to open it. You can imagine how my heart sank when we discovered that the VC didn't work right. Pictures were much clearer without it and it made a terrible growling noise. I contacted amazon and explained the situation. They shipped me a fully functional replacement overnight and it came just hours before the wedding.
Summary: So far I've mostly shot landscapes with it, so heavy on the wide-angle end at f/11 & f/16. I'm very happy with the sharpness of the photos. At the long end, no so much. The few that I've taken near the 300mm haven't been particularly sharp. Acceptable for vacation photos, which is why I bought it, but not really crisp. Overall, it's a pretty darn good all-in-one lens to cover a lot of different scenarios.
Summary: A lens for those who do not want or can not be changing all the time and be surprised in a situation that requires the lens which is saved in your bag. I got great results in f:8 and good at f:4 ... Frankly this lens is better than I thought. Use this lens on a Sony SLT-A99 and how this camera behaves well at high ISO, had no problems in using up in closed environments. I take this opportunity to thank the Amazon by professionalism during the sales process.
Summary: Five years ago my father-in-law gave me a Nikon D60 for my birthday, with a Nikon 18-50 and a Nikon 50-200. I love it, but a) I'm not gonna carry around two lenses most of the time, am I? b) 200 is long, but not really long. This one works well and takes good pictures. I've used it now on two trips, one to a barrier island in Florida and one camping in upstate NY. Worked well in a variety of natural lights and in the hotel room/restaurants.
Summary: I'm a huge fan of Tamron lenses. I have bought them for every camera I've owned. I recently purchased the Nikon D600, and my old favorite Tamron 28-270mm wouldn't work with the FX sensor. So, I bought this Tamron 28-300mm, and am every bit as happy with this one as the last. It focuses quickly and sharply. It works great for macro as well as landscape and telephoto. I'm going to see if they make a 10-24mm wide angle, or something close.
Summary: I've had this lens for a few years now. It has become the most used lens I have by far. I mostly shoot sports and while this lens may not focus super fast it covers 95% of what I need. It is true at full zoom and is consistent through the range. - Over all I would very much recommend this lens for the average non-professional.