Re: [APML] Photographic test of Meade 8" f/4 Schmidt-Newton

["Chris Schur" <cschur@cybertrails.com>]

Walter, You are obtaning similiar results that I got with my Meade 622, the
predecessor of the latest series of schmidt newtonians.  I believe that
while it is usable as a film camera, it really shines as a CCD instrument,
the center of the field being bright and exposures are quite short.

Thanks for sharing.

Chris
Astrophotograpy site: http://www.PSIAZ.com/schur/astro/index.html

----- Original Message -----
From: Walter Koprolin <a9125657@unet.univie.ac.at>
To: <astro-photo@seds.org>
Sent: Friday, May 23, 2003 5:15 AM
Subject: [APML] Photographic test of Meade 8" f/4 Schmidt-Newton


> Hi everybody!
>
> This might be of interest to the group:
>
> I recently had the opportunity to shoot two 35mm astrophotos with a Meade
> 8" f/4 Schmidt-Newton. I have written a short test report about it:
>
> http://www.astro.univie.ac.at/~koprolin/Art/SN8/
>
> As you can see, the telescope is problematic in astrophotographic use. The
> images suffer from vignetting and distorted stars near the edges. If
> bright stars are present near or within the photographed field, multiple
> reflections and Schmidt ghosts also become a major hassle.
>
> All these artifacts except the radial distortion of stars can be
> eliminated or nearly eliminated during image processing, but some of them
> only with considerable effort.
>
>   Walter Koprolin
>   Gallery of Astrophotography & CCD, Observation Reports,
>   Telescope Testing: http://www.astro.univie.ac.at/~koprolin
>
>
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