Originally posted by northcoastgreg It's good to know that I'm not the only one that feels this way about Sigma glass. I've just never been able to fully accept the yellow/green cast that so many of their lenses seem to have. Just wish Pentax would license some of Sigma's more unusual designs, like the 8-16, and slap either SMC or HD coatings on them. Not going to ever happen, however.
Don't worry, if you spend 5 minutes around here, you'll find plenty of people hating on Sigma.
Personally, I don't know what you're talking about the color cast. I never see it mentioned on professional review sites that review all brands of lenses. So Pentax lenses all have the same exact perfect color cast, even though they are designed variously by Pentax, Tokina and Tamron?
And even if it were true that Sigma lenses all somehow manage to have some kind of unusual color cast, is that even an issue if you shoot RAW? But again, I'm not necessarily buying it.
I think there's a lot of people who reflexively don't want to give too much credit to a non-Pentax lens, and to sometimes attribute undue virtue to anything with "Pentax" on it. Somewhat conveniently, Pentax seems to excel at everything that can't be measured.
And if a particular Pentax lens is sharp, the sharpness is mentioned and praised on here endlessly. But when Sigma lenses are sharp, it's because they're one-dimensional spec-whores.