Re: [APML] 10x20 minutes of the Rosette Nebula from apartment balcony.

[Joe Mize <jmize@globe-net.net>]

Ame;

     Very nice image.  I especially like the depth you got in the central opening.
It looks like you're looking down into a hollow tube.

     I see you may have the same problem I had with my OM-1.  The mirror may be out
of adjustment causing your image to be off centered.  My OM-1 was producing the same
results until I had all the foam light seals and mirror stops replaced and the
mirror adjusted.  It cost me about $50 and now my OM-1 is clean and produces
centered images just as I compose them...joe  :)

Arne Danielsen wrote:

> Dear friends,
>
> After I took delivery of an SBIG STV autoguider late last year I've been very
> eager to see what I could achieve from my apartment balcony using film through
> my Vixen R200SS (8" f/4). My first attempts where carried out in November last
> year, but it became obvious that my sky conditions didn't allow for very long
> exposures at f/4!!
>
> I then started thinking about getting a LPS filter, but unfortunately the
> limited focus travel of my scope didn't allow for a filter holder. I had almost
> given up on the idea when I saw that Herm Perez had been able to use an IDAS LPS
> filter on his R200SS. I contacted Herm and asked how he had solved the problem.
> It turned out that the coma-corrector he was using had threading on both sides
> and that he was able to attach the filter using this threading. Unfortunately my
> coma-corrector where threaded on one side only (even though it's the same type
> of coma-corrector)!! Then Herm came up with the great idea of gluing a standard
> stepper ring to the coma-corrector, allowing me to use any filter with the
> setup. Problem solved!
>
> After some test images to identify the correct exposure length using Kodak
> Elitechrome 200 with and IDAS LPS filter attached to my R200SS I decided to try
> the Rosette Nebula as my first real target. I made 10 images each with an
> exposure of 20 minutes each. After averaging them together using RegiStar 1.0.3
> I sent them to Matt BenDaniel who helped me with the image processing. The final
> result can be viewed using this link:
>
> http://home.online.no/~arnedani/astronomy/astrophoto/ngc/79-06to79-15.htm
>
> I would like to take the opportunity to publicly express my thanks to both Herm
> and Matt for taking the time and being so helpful!!
>
> Best regards,
> Arne
> --
> Arne Danielsen
> Langhussenter 15, 1405 Langhus, Norway
> mailto:arne.danielsen@oslo.online.no
> http://arnedani.home.online.no/
> N59°45'14"  E10°50'38" A115m
>
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--
       "May You Go Among The Imperishable Stars"

                              Joe Mize
                      http://sfo.sciastro.net
                  mailto:jmize@globe-net.net
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