My guess is that this is a drawer for a polarizing filter that can be rotated with the dial to the left. An ordinary pol filter may not work well ouside the UW front element.
Regards, Bertil > Based on how close the front element is to the built in lens hood, I'd > guess an ultra WA. Probably to orient that removable band, at least I > think it removable. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
