Originally posted by Blue I am not arguing whether or not they are good. However, the 85mm cost more than my FA 77mm and the new version of the 105mm macro is more than the D FA 100/2.8 WR IF they had it in k-mount which they don't. I used the Sigma 105/2.8 EX DG macro a long time and it was an excellent lens. It was also very competitively priced at the time.
For a Macro lens I would buy the D-FA 100mm WR over the Sigma. I almost bought the 77mm instead of the 85mm. Both are really good lenses, and I wish I had the slightly shorter focal length. I don't think you can go wrong with either.
Give the quality and warranty that Sigma has been providing over the last couple of years, I think they have surpassed Pentax in optics. The innovation, the warranty, the selection, the quality..... right now Pentax has a lot o catching up to do.