Summary: generates an annoying noise both when the shutter button is half pressed and as well as when it is released( in auto focus mode). At both these instances there is a visible flicker/shake in the frame as well. I do not know if it is a specific defect or a more general design flaw. I have not noticed any degradation in the picture quality.
Summary: I am using this for my D600. I will give it 3.25 out of 5. It is a good lens for: -Day time shots -A concert stage that has a good lighting system or subject is the focus from the spot light. -Zooming under a good bright light Cons: -It is a bad lens for a serious photography. -Max zooming is not good since it will reduce more lighting and noise will increase significantly. -This lens will stop working if you have limited lighting.
Summary: I am a photographer and purchased this lens too use on the Canon EOS 7D. I have had this lens for about 3 years. On the 7D, the further you zoom, the softer the image gets. I had an opportunity too use this lens on the full frame Canon 6D and it was the opposite problem, the more you intensified the zoom the clearer it was.
Summary: I am using it on a Canon 5D full frame camera professionally (weddings). For the price, it isn't a terrible lens and produces acceptable photos when working in low light situations. Pros: cost less than a Canon 28-300 at $2,600.00. Picture quality is not all that bad for indoor wedding photography. (Comparing 'L' glass with Tamron can't be done) The Tamron lens is VERY light compared to the Canon 3+ lbs. Cons: Hunts for focusing when room light is lacking.
Summary: I bought a used copy of this Tamron lens and the auto focus does A LOT of hunting in good indoor lighting, and only grabbed one good focus shot out of about four. In outdoor day light, the performance was much better. Maybe I should have bought the new thing. I returned this one.
Summary: The long range is not 300mm. It is closer to 190mm. Comparing this lens to a Nikon 55-200 VR lens, I focused closer with the Nikon lens using a Nikon D80 body. Before buying, check to make sure it zooms close enough for you. The focus is slower and more noisy than the Nikon VR 55-200 lens. So unless you need the wide side, the Nikon lens is a better deal.
Summary: This could have made it to the excellent mark with a little more effort. Seems the ideal all day lens to keep. While I was aware of the slight drop in image quality what was not acceptable was the lens AF function freezing on me. Starts to work again after some time. Considerably lighter - may not necessarily mean better. At the price point (compared to a Nikon) if this works for you - buy it.
Summary: After reading other reviews, I had pretty high hopes for this lens and that may have tained my view of what this lens does. I cover athletic events as a freelance photographer, shooting several thousand images each week. I purchased this lens for spring/summer events that offer more light than fall/winter sports which tend to be indoors or after sunset.