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Testing Lenses; Telescope Method
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45PSS



Joined: 28 Sep 2001
Posts: 3246
Location: Mid Peninsula, Ca.

PostPosted: Thu Jul 07, 2011 10:09 pm    Post subject: Reply with quote

Oil on shutter and aperture blades acts like glue causing them to stick together. In some cases the pivot pins benefit from a fine trace of lubricant and dry lubricant works best.
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Sirius Glass



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

PostPosted: Fri Jul 08, 2011 2:22 am    Post subject: Reply with quote

bartbob wrote:
What type of graphite?


Very, very fine graphite, like for lubricating locks.

I cannot answer you question about other lubricants. But listen to 45PSS, both he and Bert are two of the "go to people" when you have a question.

Steve
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45PSS



Joined: 28 Sep 2001
Posts: 3246
Location: Mid Peninsula, Ca.

PostPosted: Fri Jul 08, 2011 5:08 am    Post subject: Reply with quote

http://www.agscompany.com/lubricants/homehardware/183
has the consistent of talcum powder. It's what I use as it is what is available locally. A google search for " extra fine powdered graphite " shows some ultra fine and micro fine powdered graphite.
http://www.graphitestore.com/items_list.asp/action/prod/prd_id/34/cat_id/28
Tube-o-Lube extra fine powdered graphite is 44 microns, micro fine is 325 mesh.

If I had a piece of equipment that the warranty would be voided if I used a type of lubricant on it then I would not use that lubricant until the warranty had ended.
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