Originally posted by blwnhr Shot with the new (Series 2) Sigma Macro (not Pentax mount, obviously). Focus is on the alloy between the 2 blue plates.
Full res shot is sharp as a tack. Reduced size image doesn't do it justice.
1/250, f/4, ISO-200, 82mm.
It's a nice pic, but nothing about it would address what I saw when trying to make up my mind by looking at samples on other mounts. I really wish I could find the page again with the comparisons as It was just some walk aorund the neighborhood and take some pics of the same things at the same settings. The DOF in your pic would hide most of the corner softness that bugged me.
It's not like either is awful, but there were enough pluses on the tamron side i didn't expect, and enough minuses on the sigma side i didn't expect, that I fugred I couldn't beat the $699 price and the in stock indicator and pulled the trigger.
For the record, the 135mm softness is there in my copy too, probably the biggest issue with it real world would be doing "macro" shots at that focal length.