Re: Focus, focus, where is the focus - Was [APML] M31 - with link

["bert katzung" <katzung1@home.com>]

Hi Dave:
thanks for the reference to your article. As usual, very clear and helpful.
BTW, any results on your ST-4 sky darkness survey yet?
Bert

Bert Katzung
katzung1@home.com
www.astronomy-images.com

----- Original Message -----
From: <Aplanatic@aol.com>
To: <astro-photo@seds.org>
Sent: Friday, 03 August, 2001 8:45 AM
Subject: Re: Focus, focus, where is the focus - Was [APML] M31 - with link


> Bert, Rick:
>
> Here's something I wrote a few months ago on the subject.  I hope it
helps.
>
> Dave Rowe
>
> http://astro.umsystem.edu/apml/ARCHIVES/MAR01/msg00120.html
>
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