Originally Posted by mtngal
I didn't realize Sigma had two lenses out in 10-20. I had looked at the one with 82mm filter size instead of the 77 for the Pentax, and 520g weight. The other one, which I didn't know about, is pretty much a wash as far as size goes, when compared to the Pentax.
Oh yes, now I understand. The newer version has the constant f stop whereas the older one is variable. The older one (though still in production) is supposed to be the sharper of the two.
: 15 Ltd, 77 Ltd, 43/1.9 Ltd, Cosina 55/1.2, DA*300/4, Contax Zeiss Distagon 28/2.8, Raynox 150/250, AFA x1.7, Metz 50 af1.
: D800, D600, Sigma 500/4.5, Sigma 120-300/2.8, Zeiss Distagon ZF2 - 21/2.8, Zeiss Distagon ZF2 - 35/2.0, Nikkor 85/1.8G, Sigma 50/1.4. Nikon x1.4 TC, Sigma x2.0 TC