Originally posted by Jewelltrail I looked, but do not see any "magic pixie dust" on the Tamron lens, but these things I can see and measure from the Tamron:.
I'm not sure these are objectively shown, but IMO:
Better wide open than Da - not in my experience. f/2.8 at 35-50mm, where I used it the most, was simply remarkable on the DA*
Better Ca control than Da - didn't get the chance to test this, but I've had no CA corrections needed on any of my shots with the DA* - so this is of limited advantage to me
Better sharpness than Da - perhaps at 17mm up to f/5.6, but otherwise comparable from my point of view
Noticecably lighter than Da - not a significant advantage to me
Better warranty than DA, by a whole lot! - if warranty matters, as it certainly does with SDM, then it would be prudent to take out longer term warranty
Faster focus than Da - possibly, but not greatly so
More reliable focus mechanism than Da (when you get a good one)
- no comment
Smaller filters than Da - why should this matter?
Nicer hood than Da - subjective. I like the DA* hood very much more
Better barrell distortions at wide end than Da - the wide end is the DA*'s weakness in most aspects, though this one can be reasonably corrected
Better flare control than Da - I've compared the two in this regard and find the flare in the DA* actually quite appealing, despite being more obvious
I suppose we may like what we have or what we're used to, but I don't find these aspects convincingly proven, and most going quite the other way (and I'm not talking about MTF data).