Originally posted by Madaboutpix The perceived IQ difference between the DA*60-250 vs. the DA*50-135 could be more down to sample variation than design.
I really don't think so. It comes down to the
perceptor. Some of us don't "percept" as critically as others.
Or we shoot with a style that isn't as demanding on the lens (e.g. we shoot closer to f/8, rather than close to wide-open - or we lean heavily on PP).
If you haven't shot a lens, then I suggest carefully examining shots taken with it (including the settings used) in order to form an opinion about it. Other's opinions are very helpful - especially in pointing us in the right direction - but ultimately we need to look at the output for ourselves. If we can't get hands-on, then others' opinions are extremely useful in giving us hints about ergonomics and other factors.
But ultimately, IQ speaks for itself - if that's what you're comparing!