Re: [APML] Deep shot question

["John C. Mirtle" <jmirtle@shaw.ca>]

CCD? That would get the Corona cluster fine, if you have one lying around.
If not, faint, low contrast stuff like this is just begging for hypered tech
pan. At f10 this would be a long exposure, 2 to 3 hours under good skies. If
you feel colour is really important for these guys, tech pan would make a
good basis for an L/RGB stack. For a comparison, an 8" f6 Newtonian will hit
galaxies between 17th and 18th mag with a 1 hour exposure on tech pan.
(under good conditions)

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: "Alan Voetsch" <critter12952@yahoo.com>
To: "APML" <astro-photo@seds.org>
Sent: Wednesday, May 22, 2002 9:54 PM
Subject: [APML] Deep shot question


> I'm going to try shooting the Corona galaxy cluster. I
> tried this 2 or 3 years ago but didn't get much. Don't
> remember what the problem was.
>
> Is there much hope of getting anything or, will I be
> wasting valuable time? This will need to be at least 2
> hours to have much chance. Would a second exposure for
> a stack be worthwhile? Or are these kinds of objects
> best left to the CCD guys?
>
> I'll use the 12" LX200 with Supra 400 at f/10.
>
> Thanks,
> Alan



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