The Pentax 20 mm has a 67 mm filter size. The Cokin P series take up to 82 mm rings and the filter itself is 86 mm wide. It would seem to me that you should have no problem using the P series with those lenses.
Cheers, Mike. Dean wrote: > Can you use a Cokin style P-series filter mount on the Pentax K-mount > 20mm and 24mm without noticeable vignetting? (I'm thinking of a > modified mount with the outer filter holders shaved off) - 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 .
