Re: [APML] Knife edge focusing question

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

Hi Herm:
Thanks for the quick response. So I should have my eye practically on the
focal plane, ie, mashed up against the back of the camera? Should I be
focussing (my eye, that is) on the tiny star image that I see up inside the
scope or as close as possible to the knife edge?
Thanks....
Bert

Bert Katzung
katzung1@home.com
www.astronomy-images.com
----- Original Message -----
From: "Herm" <hermperez@worldnet.att.net>
To: <astro-photo@seds.org>
Sent: Wednesday, 01 August, 2001 9:15 PM
Subject: Re: [APML] Knife edge focusing question


> you have to use the slow motion control in your mount to slowly drive the
knife
> edge across the beam of light.. its very delicate. Your eye must also be
very
> close to the focal plane and centered over the star.
>
> "bert katzung" <katzung1@home.com>  wrote:
>
> >Where is this black bar that comes
> >across in one direction inside focus and  in the other direction outside
> >focus?
>
> Herm
> Astropics http://home.att.net/~hermperez
>
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