It's the A button on the aperture ring. It is held back by two leaf springs. These are poorly secured to the plastic lens body and come loose. They prevent you from moving the aperture ring all the way to A.
If you are careful, you can take the aperture ring off and glue the leaf springs down with super glue. The only tricky part is doing it slowly and not looseing the tiny ball bearing that makes the f stops go click. But you should be handy with small parts and have patience. Regards, Bob S. > > My trusty A-50/1.7's aperture ring is so sticky it will > > not go over f8/f11...have anybody seen this before? and > > what to do or is it time to let a professional fix it? > > Between f1.7 - f8/f11 it seems to be OK. - 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 .
