Heinko, No other purpose or function to the little white bump. It is there to help you locate the mounting point by feel, in the dark. It was on K, M and A lenses. They function perfectly without one. ...but finding a replacement is problematic. Regards, Bob S.
[EMAIL PROTECTED] writes: > I've seen a K4/200, where the little white button on the side of the > lens is missing. The only purpose of this button that I know is to help > fitting the lens to the body (lining up the white button with the > release catch on the body mounting). But is this the only purpose or is > there anthing else? And - more important - is it a problem > if the button > is missing? - 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 .
