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Re: [ATM] How far from the telescope should an artifical starbeplaced
A small correction, it should be 10 times focal length for F/8 and slower and 20 times the focal length for F/8 and faster.
Don
----- Original Message -----
From: "Don D'Egidio" <djd521@comcast.net>
To: "Bruce MacDonald" <brumac@gmail.com>; "ATM List" <atm@atmlist.net>
Sent: Friday, October 07, 2005 8:36
Subject: Re: [ATM] How far from the telescope should an artifical star beplaced
> Bruce,
>
> If I remember Suiter's correctly, for focal ratios F/8 and slower 10 times the focal ratio will work, and for focal ratios faster than F/8 then 20 focal ratios are better.
>
> Don
>
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