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han_solo82
member
Reged: 05/30/08
Posts: 20
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After a camping weekend with friends and my WO scope, my eyepieces are now filled with eyelash oil and other spots. I have search the web and these forums for tips on cleaning eyepiece and found that the televue instruction are probably best and easiest :
http://www.televue.com/engine/page.asp?ID=143
Now, I have a question. When I want to the pharmacy, I found 2 types of alcohol : one was 70% rubbing alcohol, and the other one was 99% isopropyl alcohol.
I went with the 99% isopropyl alcohol, since it is more pure than the rubbing one. Is it ok to use this type of alcohol (isopropyl) to clean eyepiece (and eventually, camera lenses) 
I just want to be 100% sure before putting anything on my precious eyepieces!!
thanks!
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Luigi
Carpal Tunnel
Reged: 07/03/07
Posts: 1950
Loc: Massachusetts
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99% is fine to use. Rubbing alcohol is simply dilute isopropyl alcohol. Alcohol absorbs water from the air so 99% IPA will become more dilute if the bottle is not tightly closed. Methanol, what I use, is even better as it leaves much less residue on optics. It's somewhat toxic so isn't usually available at pharmacies. Chemical supply houses have it.
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17.5" f/5 Discovery Truss
IM715 7" f/15 MCT, Eon-120ED refractor
CG5A coffee grinder, Orion Skyview Alt-AZ
35,19,15 Pans.9 Nag. Meade 24.5 4kSWA, 4.7 5kUWA.
BO-TMB 7mm planetary.
Zeiss Diascope 85
Zeiss, Leica, Canon IS, Fujinon, Nikon binos
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han_solo82
member
Reged: 05/30/08
Posts: 20
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great! I guess I whould be fine with what I bought then!
thanks Luigi!
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