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gnowellsct
professor emeritus
Reged: 06/24/09
Posts: 732
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Re: Problem with cleaning a barlow
07/02/09 02:51 PM
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I've used Dr. Clay's solution, windex, alcohol, and acetone. The best is Purosol.
The problem with many of these solutions is that (a) they have water in them, which tends to streak; or (b) they are hydrophilic, meaning, like acetone, they suck water right out of the air and then leave a streak on the glass.
Purosol link
I buy them two at a time to reduce shipping cost per bottle, a bottle lasts me over a year. You can get additional information on the astro-physics web site which sells Purosol as part of its kit. Purosol works so well I've never needed the rest of the kit.
regards
Greg N
--------------------
"Aperture will get you through times of no money better than money will get you through times of no aperture."
featuring selected astrojunk:
bunch o' widefield eyepieces
bunch o' narrowfield eyepieces
couple o' Barlows
couple o' scopes
couple o' mounts
couple o' tripods
and a pier 'n' stuff
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