Re: [APML] Tech Pan shot

["Stuart Heggie" <Stuart.J.Heggie@sympatico.ca>]

John and Richard, both versions are outstanding! Nice ones both!

Stuart
----- Original Message ----- 
From: "Richard Crisp" <rdcrisp@earthlink.net>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Thursday, August 11, 2005 1:48 AM
Subject: Re: [APML] Tech Pan shot


> Hey John
>
> you also have CED214 in that image
>
> coincidentally I am shooting that very pair tonight!
>
> here's what I did in that area last year with an FSQ and the IMG6303
>
> http://www.narrowbandimaging.com/cederblad_214_fsq6303_s2hao3_page.htm
>
> and in Halpha only:
> http://www.narrowbandimaging.com/cederblad_214_fsq6303_page.htm
>
>
>
>
> ----- Original Message ----- 
> From: "spampit" <spampit@shaw.ca>
> To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
> Sent: Wednesday, August 10, 2005 10:29 PM
> Subject: RE: [APML] Tech Pan shot
>
>
> > George,
> > If the technology fails you for guiding, there is always manual
> > guiding! It builds character. :-) I didn't notice that you were using
the
> > Lumicon filter. That being the case, you can most certainly go longer!
> > Under
> > a moderately dark sky at f3.5 and the Lumicon filter, you can shoot for
at
> > least an hour with a first/last 1/4 moon up. I have always stayed 30
> > degrees
> > away from the moon, it may well be possible to shoot closer than that. I
> > never really did find the limits to this type of photography with
> > telephotos. Under a dark sky and a Wratten 92 I know that I can shoot
for
> > 45
> > to 60 minutes at f1.5 and still have a printable negative. (with 5
minute
> > development) http://www.astrofoto.ca/john/n7822.htm Maximum exposure
time
> > will vary, depending on your type of light pollution, how well the film
is
> > hypered, humidity levels etc. Maybe start with 45 minute shots at f3.5
and
> > see what happens. You are going to need a very good polar alignment for
> > these long, wide field, high-rez images! I never did try shooting under
> > full
> > moon, you might as well try. Push the envelope!
> >
> > John Mirtle
> > Calgary, Ab. Canada
> >
> > -----Original Message-----
> > From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org]
> > On
> > Behalf Of George Anderson
> > Sent: Monday, August 08, 2005 8:59 PM
> > To: Discussion of Film Astrophotography
> > Subject: Re: [APML] Tech Pan shot
> >
> > Hi John, nice to hear from you again.
> > I haven't done any vignetting reduction on the photo yet, too busy
> > debugging other problems with my setup. I am in the process of switching
> > from my 70mm f/10 guidescope with a 10mm EP containing a homemade
> > non-illuminated crosshair, to my B&W quickcam on a 500mm f/8 mirror
> > lens. The sensitivity is ok, just a real pain to align with the mount.
> > The field of view is so small that I can't even swing polaris in a
> > circle.
> > That shot was done with a Lumicon HA filter under moderate light
> > pollution, at 18 minutes the negative is thin to say the least. I did
> > two more shots saturday night with the quickcam and laptop for visual
> > guiding. Much easier on the eyes, but I hadn't aligned the camera and it
> > was out by a good 5-10 degrees from the mount axis. Very nice trailing
> > (three star diameters) on the two 30 minute shots...  :^(
> > Just how much of a moon and at what angular separation from the target
> > is safe with the HA filter? That will improve my shooting nights by 200%
> > if I can shoot up to the quarter moon. Our weather always improves
> > around that time.
> >
> > George
> > Clear skies and good health
> >
> >
> >
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >
>
>
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