On 28 May 2011 00:06, Darren Addy <[email protected]> wrote: > This is the 2nd time I've run across this and wondering if anyone can > explain the problem/fix. > I've got a MINT looking Pentax-A 50mm f1.7. But the aperture ring does > not move smoothly (but rather jerky feeling) and doesn't want to go > past the spot between f/8 & f/11. > I got it to go as far as the "A" position once, but now it is being > stubborn again. Seems strange for a lens that appears to be in like > new condition. > > Anyone dealt with this? (I'm not afraid to open it up). > Thanks in advance for any replies.
They have two little springs plastic welded to the inside of the aperture ring and they have really poor mechanical strength so they often become unfastened and jam up the mech. Two ways to fix, glue them back with a good epoxy or use a small screw and glue, I've repaired them both ways before, can't remember which way was the least painful ;( -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
