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Achernar
Post Laureate
Reged: 02/25/06
Posts: 3727
Loc: Alabama, USA
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Re: What kind of compressed air?
06/26/08 11:40 PM
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None is the kind you should use, because compressed air often has oil, water or both in it. If you've ever seen the sort of junk that can come out of an air compressor, you would never use compressed air on your mirrors. The blast of air can turn any grit on the mirror into what amounts to sandblasting which is not a good thing for optical surfaces.
Taras
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10-inch F/4.5 Discovery Dob
6-inch F/8 Homebuilt Dob
4 1/4-inch F/4 Homebuilt reflector
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