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photonovore
Moonatic
Reged: 12/24/04
Posts: 2488
Loc: tacoma wa
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Re: What kind of compressed air?
07/03/08 09:39 PM
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Fiske,
I wasn't making any blanket argument against using compressed air to clean optics.
I would, however, certainly advise checking the output of *any* air compressor for absolute purity and cleanliness before using it to clean any optic. I personally would not use any but an oil-less type compressor to clean optics. One sees this type more often in labs and art studios than in home garages, where the oil lubricated compressor type is most common (the two wheeled types made by Sears and everyone else)--and the latter are almost never equipped with a line or any other filters. They are potential trouble. Most all mechanic shops purposefully inject oil into the compressor airstream to lubricate their airtools, so that is no alternative-- though i am sure one that has been tried--by someone...
I find people much more willing to relate success stories-- than stories detailing their embarrassments.  That's a well known problem with anecdotal evidence.
Point is, it is a very good idea to know just what kind of "compressed air" one is using---before one uses it on optics. That is probably something we can all agree on.
--------------------
Mardi
4" achromat, ETX-70.
Whitepeak Lunar Observatory Website
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