Re: How do I clean a 10" Meade Schmidt Cassegrain?
From: Alexander Avtanski (avtanski_at_ispwest.com)
Date: 07/07/04
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Date: Wed, 07 Jul 2004 15:48:18 -0700
Hello,
Chris L Peterson wrote:
> On Wed, 07 Jul 2004 17:43:08 -0400, Tom Tolley <ttolley@cox.net> wrote:
>
>
>>I bought a 10" Schmidt Cassegrain on Ebay. It looks great except some
>>their was some water marks on the mirror and plate from condensation.
>>What is the best way to clean the optics. It was once recommended to me
>>that Zippo lighter fluid was great for cleaning optics. It dried clean
>>without harming the coatings.
>
>
> Make sure the corrector is free of dust, then clean it with Windex and Kleenex.
> Don't worry about the mirror- the effects of some condensation stains are
> probably negligible. While an SCT mirror can be cleaned, there are tricks to
> removing the corrector, and cleaning any mirror is always risking damage. I
> wouldn't consider using lighter fluid. It is a nasty solvent, and is likely to
> leave an oily residue.
I never used Windex for cleaning optics - it may work
very well, I don't know. But just a word of caution from
me:
Couple of weeks ago I cleaned my car windows with Windex.
It left bad oily residue on my windows, especially visible
when looking through the windows toward bright light. At
first I assumed that the problem is probably caused by
something in the car wash solution, but then I found that
the same thing happens on the _inside_ of the windows.
Still, I'm not sure it was caused by the Windex, but I don't
see what else may be the problem. Maybe my bottle was
from a bad batch, I don't know...
- Alex
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