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| Graphex shutter stiff/stuck ring: partial disassembly? Goto page Previous 1, 2 | |
| Author | Message |
|---|---|
| Henry Joined: 09 May 2001 Posts: 1662 |  Posted: Fri Jul 22, 2011 1:11 amA old prof. of mine once said that if something happens only once, it's a miracle. So count your blessings.  |
| 45PSS Joined: 28 Sep 2001 Posts: 4081 | Posted: Fri Jul 22, 2011 3:14 am I've got a bad habit of not making the same mistake twice. |
| Sirius Glass Joined: 06 Jun 2010 Posts: 162 | Posted: Fri Jul 22, 2011 10:54 pm Bert told me to use fine graphite to lubricate the shutter on my 135mm lens. That did it. Roughly one hundred firings for each speed took care of the problems. |
| bartbob Joined: 30 Oct 2010 Posts: 102 | Posted: Sat Jul 23, 2011 2:48 am Sirius, was your shutter firing too slow and the graphite sped it up to normal? |
| C. Henry Joined: 13 Dec 2005 Posts: 360 | Posted: Sat Jul 23, 2011 1:59 pm Excess friction is only one of several possible causes of slow running of a shutter. Cleaning and PROPER lubrication corrects only this cause of slow speeds. Another possible cause is the loss of strength of the spring(s) in the mechanism which will not be corrected by cleaning and proper lubrication. Frequently, slow running is caused by a combination of causes and no one fix cures the problem by itself! C. Henry |
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