�Hi, I have a problem with the diaphragm on a Pentax 100mm f/4 macro. The diaphragm work ok, except at shortest focus, then it doesn't close. So it is not a sticking diaphragm. If I move the diaphragm-lever with my finger I here a click when I fully open the diaphragm, this click prevents the diaphragm from closing when taking a picture. This click does not happen at other than shortest focus. Anyone have help? Frank - 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 .
