Darren Addy 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.
Very common issue. The A50/1.4 was made with a metal aperture ring. The A50/1.7 was made with a cheaper, plastic aperture ring which wore out with use and typically got very notchy as you describe. It can be helped somewhat with disassembly, cleaning and lubrication. -- Mark Roberts - Photography & Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
