On 4 Aug 2002 at 0:34, Peter Spiro wrote: > I was offered a 50mm A f/1.4 lens in mint condition, but I noticed that the > diaphragm closes slowly. It does not have any oil visible on it, which is the > usual cause of slow diaphragms, so I'm concerned that a simple cleaning won't > fix it, and it may have a more costly mechanical problem. Does anybody have any > experience with this?
Peter, It could require a very simple repair, I have bought lenses with similar symptoms. All were fixed by removing the mount then cleaning and re-lubricating the aperture coupling rings which rotate at the rear of the lens and couple to the actual aperture mechanism. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html - 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 .
