Some commentators say here that they had "a lot of committee". I can not say here. I have little committee, not so much as with my other lenses. It may be that at high zoom autofocus no longer doing so well, but I put the focus anyway manually. With manual settings to reach better results than automatic.
At high zoom you may find significant fringing in fact in some subjects (especially for high contrast). But that is only on some subjects and just only the most powerful zoom so that it makes itself felt. An example I invite with high, 300 mm zoom, clear contrast, as you can see the color stripes but significantly. The slight cushion education that some find fault here, I could see, but not so that it interferes. For landscapes, as I do most, you do not notice that, as a rule anyway.
I note that those who invest here particularly high standards, the objective purely on his - reduce errors - small. That is the objective but does not do justice. Of course, the error must be mentioned, so that the Tamron - hopefully - reads and the successor to it works to minimize the error.
Who has very high CLAIMS THAT is better off with professional lenses, which cost then also again an entire end more. Who is a good Spazierengehobjektiv, one needs for the holidays, one for all occasions, who with the Tamron 16-300 a very good lens.
Anyway, I'm very satisfied. Because of the aforementioned things, although I can not 5, but at least 4 stars awarded (4 1/2 there is unfortunately not).