Originally posted by axl I don't think it is...
having said so, it's not much worse then FA*24 in CA.
Where it looses the battle is contrast and colour rendition.
Even the picture on top of this page documents this nicely (no offense to the poster)
You are correct about color in the photo I posted, but it is not the fault of the lens. I processed it before I knew much about Lightroom. Since then, I have adjusted the color correction to the RAW image. Time permitting, I will post the new version. Although Sigma lenses in general produce slightly different color than Pentax lenses, on digital, as opposed to film, the difference makes no difference after post-processing. The same applies to contrast. Lightroom's 'clarity' adjustment can produce as much micro-contrast as one can stand. And no offense taken.