Re: [APML] Copygraph finished and hypering Q

["Brian Larmay" <astrobri@ameritech.net>]

Well I was out hoping to shoot m44 and jupiter but the clouds started moving
in for any possibility of that.
I wanted to try the new scope and see how the edges Vignetted isince the
film was loaded allready.

Murphys law.
Brian


----- Original Message -----
From: "John C. Mirtle" <jmirtle@shaw.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, March 11, 2003 11:07 PM
Subject: Re: [APML] Copygraph finished and hypering Q


> Agreed Kent - for long exposures. Brian, why ARE you shooting the moon
with
> hypered TP? If you need hypered tech pan to shoot the moon, then I think
> that your new copyscope might possibly benefit from some slightly faster
> optics! :-) You might want to save the hypered stuff for H-alpha work
where
> you need the performance......
>
> John Mirtle
> Calgary, Ab. Canada
>
>
> ----- Original Message -----
> From: <kgkirkley@aol.com>
> To: <astro-photo@seds.org>
> Sent: Tuesday, March 11, 2003 9:57 PM
> Subject: Re: [APML] Copygraph finished and hypering Q
>
>
>
> John:
> I think we're comparing apples to oranges.
> Perhaps I should have questioned why he was wanting to use hypered Tech
Pan
> to photograph the moon, because it is a waste of good hypered Tech Pan.
You
> are probably correct that for short exposures (like 1/1000 to 1 sec.) and
> bright light the speed isn't effected by hypering. However, for it's usual
> application in astrophotography; ie. nebulae, galaxies, etc. with HA
> filters,
> long exposures (like minutes to hours), hypered Tech Pan does have an
> increased exposure index over unhypered Tech Pan.
>
> Kent Kirkley
>
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> Astro-Photo@seds.org
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