Re: [APML] Lagoon and Triffid Region

["Volker Wendel" <volker@spiegelteam.de>]

Bobby,

> Boy I bet a 12-14" Schmidt would be something.

Philipp Keller who was member of this list earlier built a 16" f/2-Schmidt
years ago. If you would see result of that camera that I saw, you couldnīt
breath for a few moments. He used TP4415 with that camera! I especially
remember one shot of Shajn 147 which is unbelievable...there is no shot
available on his page. The Shajn shot was published in a german magazine
(totally and a resized part of it) which shows whatīs going on
there...again, unbelievable! But that tube weights 100 kilograms....

Volker
www.spiegelteam.de



> Bobby Middleton
>
>
> ----- Original Message -----
> From: "lkt" <tan@cox.net>
>
>
> > Bobby,
> >
> >  Thanks. I have not done mosaics with the Schmidt. I am sure it's
> > possible but I expect it to be a lot of work. Actually, I have never
> > done any mosaics with anything <g>.
> >
> > Here is a much higher rez version.
> >
> > http://www.starryscapes.com/tmp/m8_m20_wide_large.jpg
> >
> > Let me know what you think. I believe this resolution is getting to the
> > breaking point. If I had to guess the resolution of the 8" Schmidt with
> > TP is somewhere between that of a 5" to 6" refractor with color emulsion
> > but with a noticeaably larger field.
> >
> > Loke
> >
> >
> > Bobby Middleton wrote:
> > >
> > > Really deep Loke. The HC110 plus the red channel composite was
excellent
> > > strategy for this high dynamic range target. Schmidt cameras are just
> > > capable of sooo much with the TP. Excellent work. Would you post a
high
> res
> > > shot for us to see just what that Schmidt camera is capable of on TP?
> > >
> > > Have you ever attempted mosaics with the schmidt shots?
> > > Bobby Middleton
> > >
> > > ----- Original Message -----
> > > From: "lkt" <tan@cox.net>
> > > To: <astro-photo@seds.org>
> > > Sent: Wednesday, May 29, 2002 3:54 AM
> > > Subject: [APML] Lagoon and Triffid Region
> > >
> > > >
> > > > OK, here is another shot of the M8 (Lagoon) and M20 (Triffid) region
> in
> > > > Sagittarius. This was taken with an 8" F/1.5 Schmidt camera with
> > > > tricolor filters on hypered Tech Pan. HC110 Dil. B was used to
process
> > > > the film for 14 mins. This developer was selected due to the extreme
> > > > brightness of the core of M8 and M20 which means that the image
would
> > > > have a lot of dynamic range. Even so, the red channel was done with
a
> > > > composite of a 5 min and a 25 min exposure with a #92 filter. The
long
> > > > 25 min exposure with the #92 filter can extract a lot of the red
> > > > nebulosity in this region but the cores of M8 & M20 were saturated.
> More
> > > > exposure data is on the webpage. Comments are welcome.
> > > >
> > > > http://www.starryscapes.com/nebula/m8_m20_wide.html
> > > >
> > > > Loke
> > > >
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