grahamgibson wrote:
freaklikeme wrote
At the long end, the choices narrow considerably. The Tamron 70-180/2.8's performance at the long end isn't great or that long, the Sigma 70-200/2.8's a bit of a tank and about as good as the original GM but the AF isn't as good, and, were I starting from scratch, the only Sony I could afford would be a used 70-200/4. There, though, I could break my own rule, since I already have the GII in my wildlife kit (bug hunter) and use that. FWIW, the Tamron 70-180 image quality is excellent at the long end. The MTF is easily as good as the Sony 70-200/4 G II wide open at max focal length. I compared my own Tamron with a borrowed GII and couldn't see anything between them really. The choice comes down to the other attributes, but not IQ.
Well, you should have seen a difference of 20mm at the long end, which is not irrelevant, and the close up is much better in the Sony. The Tamron is a nice lens, but I sold mine as the 20mm on long end and macro was more valuable than the 1 stop of speed.