"Rob Studdert" <[EMAIL PROTECTED]> wrote: >On 31 Jul 2002 at 16:53, Mark Roberts wrote: > >> Common problem with the A50/1.7. The aperture ring is plastic, rather than metal >> as on the A50/1.4, and it wears readily. Also the springs that tension the "A" >> button sometimes break off. They can be reattached, but it 's a bit tricky and >> takes some creativity. > >I too had this problem occur with one of my lenses, the little metal leaf >springs have a hole at their bases and that are held in place by a plastic >spike on the aperture that has been melted. This joint fractures and then there >is no material left to allow it to be re-attached. > >What I did to repair mine was to clean all the lubricant from the area with >spirits. And then use a slow setting epoxy glue to re-attach the spring making >sure that no glue fouled the rotating parts of the mechanism. I'd stay away >from cyanoacrylates (ie Super GlueŽ) as it can foul surfaces whilst curing.
I actually drilled a hole where the broken plastic "spike" used to be and re-attached the spring with a tiny screw (how Pentax should have done it in the first place). -- Mark Roberts www.robertstech.com - 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 .
