Re: ATM Re- Fans

["Frédéric Géa" <geaf@unionfinancieredefrance.fr>]

Also, if it's because of the fan, turn the fan off should stop it really
fast compare to an unheaven cooling of the glass.


Frédéric Géa
http://www.astrosurf.com/altaz
-----Message d'origine-----
De : Clive Milne <milnecd@yahoo.com>
À : atm@shore.net <atm@shore.net>
Date : mercredi 21 mars 2001 15:09
Objet : ATM Re- Fans


>
>
>  Mel wrote:
>
><snip>>>- I've seen very subtle vibration unnoticed by
>human touch, or hearing, to show up at the eyepiece,
>as an astigmatic elongation of the star image.<<<snip>
>
>    I suppose the easy way to to tell if vibration is
>the root cause of an astgmatic star image, is to check
>the orientation of the elongation inside and outside
>of focus. If it flips 90 degrees, then it isn't caused
>by vibration.
>    Regards
>         Clive.
>
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