Anthony, Not a bad night's work. <g> I've done the same repair myself, but didn't know the baking soda trick. I'll keep it in mind. And you didn't loose that little ball bearing either that makes the click-stops work. I've got a A50/1.7 that has the problem.
Regards, Bob S. [EMAIL PROTECTED] writes: << But life isn't that simple, my A 50/1.7 proceeded to have it's aperture ring become incapable of less than f9.5. I opened it up and looked and searched and tested and at last found the cause. Under the aperture ring are two staggered flat springs that lock around the A button when it's engaged. One of these had unseated itself and was interrupting the full movement of the aperture ring. Incidentally the other spring showed the marks of a repair 10 years or more ago when a similar fault occurred, it had been plastic welded back into place and the repair still looked good. But, having no plastic welder I used super glue (cyanoacrylate) to reseat the spring. When that had hardened off I added a bead of super glue to the hole in the spring (where whatever the original locking method was had once been) and added my not so secret ingredient - baking powder. A dusting of baking powder will instantly cure super glue, I have porcelain with over ten year old super glue and baking powder repairs to chips that are still rock hard. BTW don't use super glue near plastic lenses, they will be fogged by outgassed corrosive chemicals as the glue cures. So, two lens mounts stripped and reassembled, one element cleaned and one mechanical repair didn't seem like a bad night's work :) - 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 .
