More 100% centre crops of effin' brick wall shots, this time three different lenses at the same time with (more or less) the same frame, on a tripod with remotely triggered shutter:
DA* 16-50mm, 35mm, F4:
For comparison, DA 35 limited, F4:
And (the only other zoom lens that I currently own that can do F4), the DA 55-300mm, 55mm, F4:
(Just by the by, the 18-55 was hopeless at 35mm, F4.5).
Maybe I'm getting all bothered over nothing. I've always found the 55-300 to be perfectly acceptable (but it was also a bargain) and the DA* shot looks a lot better.
As for exposure, it looks like it's
underexposing at F4 rather than overexposing at F2.8. I'll have to live with it and play with exposure in post.
Another conclusion: the Tamron 17-50mm simply has superb IQ (although others have issues with this one too).
Maybe I should stop shooting my back wall (my neighbours must think I'm bloody mad) and take the 16-50 out and try and enjoy it. Not this afternoon, though: Andy Murray's in the Wimbledon final!