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The trick I've found to getting the streaks is just keep going over it with new cotton; first damp then dry but only use cotton once and throw it away. I use the 100% cotton pads you get from the cosmetic area at Walmart or wherever.

Also, I don't use the mixture Celestron suggests, I only use about 10% alcohol and 90% distilled water. (They don't even recommend distilled water...?)

I don't think you'll notice the streaks visually but I don't know about imaging.

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They specified distilled, but I used RO-DI 99.9% lab grade water. Should be close enough.

That said, I though about it all night and gave it a quick dab this morning with some new suggested methods. It improved, but there is still a bit of streaky discoloration on the glass in one spot. It doesn't seem to want to come off. I didn't use much force originally, but I'm a bit nervous. The spot doesn't look like streaks anymore, it just looks like the glass has a small discoloration. The alcohol solution doesn't seem to do anything to it.

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Adam

Celestron CPC 800, Celestron HD Wedge
Hyperion 17mm, Celestron 40mm Plossl, TMB 9mm
WO 66, SSAG
Modded Canon XS

Lackawanna Astronomical Society

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Edited by Footbag (07/03/09 08:43 AM)

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