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Graphex shutter stiff/stuck ring: partial disassembly?
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Henry



Joined: 09 May 2001
Posts: 1442
Location: Allentown, Pennsylvania

PostPosted: Fri Jul 22, 2011 1:11 am    Post subject: Reply with quote

A old prof. of mine once said that if something happens only once, it's a miracle. So count your blessings.
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45PSS



Joined: 28 Sep 2001
Posts: 3228
Location: Mid Peninsula, Ca.

PostPosted: Fri Jul 22, 2011 3:14 am    Post subject: Reply with quote

I've got a bad habit of not making the same mistake twice.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.
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Sirius Glass



Joined: 06 Jun 2010
Posts: 123
Location: Southern California & Virginia

PostPosted: Fri Jul 22, 2011 10:54 pm    Post subject: Reply with quote

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.
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bartbob



Joined: 30 Oct 2010
Posts: 102

PostPosted: Sat Jul 23, 2011 2:48 am    Post subject: Reply with quote

Sirius, was your shutter firing too slow and the graphite sped it up to normal?
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C. Henry



Joined: 13 Dec 2005
Posts: 358
Location: North East Georgia, USA

PostPosted: Sat Jul 23, 2011 1:59 pm    Post subject: Reply with quote

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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