For screwmount try to find a Mamiya 21mm F4. It's sharp even in the corners. About $150.
There is also a screwmount Zeiss Flektogon 20mm F2.8 and F4 that are supposed to be good. About 200-300 bucks though. JCO - 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 .