RE: [APML] IC1396 on RG200

["Eric Barber" <ppsupport@cox.net>]

John,

Thanks for the tip on the Orion eyepiece. This will help. Yes I have guided
with my CEG manually with success, I was just concerned about getting a star
on the tiny ST-4 chip.

Thanks,

Eric

> -----Original Message-----
> From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> Behalf Of John Boudreau
> Sent: Thursday, August 15, 2002 6:27 AM
> To: astro-photo@seds.org
> Subject: Re: [APML] IC1396 on RG200
>
>
> Hi Eric,
>
> Since the diameter and length of the CEG is different than the GEG and NEG
> that i use, the extensions used will probably be somewhat different than
> from my experiences. There are APML members using your combination, if you
> search the APML archives you may come across info on that setup. Or maybe
> post the question under that subject title so it gets noticed by
> those APML
> members.
>
> You shouldn't have to much difficulty finding guide stars with a
> CEG though.
> It has a good range of adjustment. The effort of finding guide
> stars is more
> than offset by eliminating the flexure problems of a guide scope setup,
> along with any problems induced by the SCT's mirror flop. Setting up an
> eyepiece to be parfocal with the ST4 will certainly make the job
> of finding
> guide stars much easier. And it will show you what extensions you need.
> Hint: The 10mm Orion Sirius Plossel is almost ST4 parfocal. Just
> pulling it
> out about .5mm is about right. A friend of mine has one, he
> spaced the 1.25"
> barrel .5mm further away with a gasket made from an old credit card. The
> gasket has to be the diameter of the eyepiece's optics housing,
> so that when
> inserted in an adapter it comes to rest on that gasket, thus spacing the
> eyepiece out by .5mm. This works as well as my $$$$ Software Bisque ST4
> IFocus eyepiece. In fact I disassemble mine and found out it was
> a modified
> and unmarked Orion 10mm Plossel!
>
> John Boudreau
> jeboud@attbi.com
> http://home.attbi.com/~jeboud/astro.htm
>
> ----- Original Message -----
> From: "Eric Barber" <ppsupport@cox.net>
> To: <astro-photo@seds.org>
> Sent: Wednesday, August 14, 2002 10:22 PM
> Subject: RE: [APML] IC1396 on RG200
>
>
> > Hi John,
> >
> > I happen to like the spikes:). I have a question for you... I am new to
> the
> > ST-4, and am currently using it with a guide scope in a side by side
> > configuration, two little refractors. I also have a C9.25 and
> Lumicon CEG
> > which I'm looking to use with the ST-4, but I'm intimidated by the
> prospect
> > of acquiring stars and focusing with the OAG and ST-4. Can you comment?
> And,
> > I'm specifically wondering if you have to use extension tubes with the
> ST-4
> > to bring it to focus, and how did you figure all that out.
> >
> > Thanks a bunch.
> >
> > Eric Barber
> >
> > > -----Original Message-----
> > > From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
> > > Behalf Of John Boudreau
> > > Sent: Wednesday, August 14, 2002 5:56 PM
> > > To: astro-photo@seds.org
> > > Subject: [APML] IC1396 on RG200
> > >
> > >
> > > I finally got a chance to shoot IC1396 with hypered "old" RG200. It
> *just*
> > > fit in the field of my TV85. This is a 90 minute exposure @ f/5.6
> > >
> > > http://home.attbi.com/~jeboud/ic1396.htm
> > >
> > > Processed in Photoshop and MaxIm DL. I lightly blended a PS
> > > curves-tweaked R
> > > channel copy as a synthetic L channel in MaxIm, it seems to have
> > > helped the
> > > nebula's details somewhat.
> > >
> > >
> > > John Boudreau
> > > jeboud@attbi.com
> > > http://home.attbi.com/~jeboud/astro.htm
> > >
> > >
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> >
> >
> >
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