vvn> 20/4 Carl Zeiss Jena (77mm filter). Not as sharp as the later 20/2.8 (which vvn> shares the basic optical formula with the Pentax 20/2.8), but the 20/4 is vvn> probably more rectilinear than any othe 20. All but the last batch were vvn> single coated. And I'm araid none were K mount, just some M42s (and vvn> Practica bayonet).
The 20/2.8 CZJ is almost as rectilinear as any largeformat wideangle. It has almost no distortion. However, I think the sharpness can vary according to sample. I don't believe the 20/4 CZJ could be any more corrected for distortion than the 20/2.8 CZJ. And the later has the added benefit of MC. The SMC 15/3.5 is about as distortion-free as the best too (well, it's the best anyway). vvn> Finally, check out the new Sigma 20/1.8 and 24/1.8; I believe each takes a vvn> 77mm filter. They've been gaving great reviews, though don't expect the vvn> build quality and coating to be up to Pentax standards. I didn't particularly like the 24/1.8 - especially in the corners. However, my testing was very informal and dirt quick, I must try it some another time. Good light, Frantisek Vlcek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
