RE: [APML] Finally, Got A Half Decent Picture

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

Eddie, a very nice first success!  A few points to offer, first the
background is a little light on my monitor, but close.  The background also
looks a bit smoothed from some sort of gaussian blur, maybe over done a bit.
Finally, the strange shapes protruding from the bright stars are usually
caused by a peculiar shaped object in the tube in the optical path, usually
non symmetrical spider vanes or a secondary offset.

Looking forward to more great shots,


Clear Skies,

Chris Schur
Astro: http://www.PSIAZ.com/Schur/astro

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Eddie Guscott
Sent: Tuesday, February 17, 2004 11:22 AM
To: APML
Subject: [APML] Finally, Got A Half Decent Picture


Hi All

Well after trying for nearly 2 years I finally got a half decent prime focus
pic on film. I've done OK'ish with wide field but this particular night I
think it all worked.
I'll let you be the judge - it's an M42 (yawn!) taken with an OM1 on a TMB
5" F6 refractor, guided with an ST4 on a 80mm F6 guidescope.
Exposure was 50 mins on Provia 400F with a separate 5 mins exposure for the
trapezium region.

I'm not sure if I've processed it the best way but this is the version I
ended up being happy with.

I would appreciate any comments or criticisms (tracking was just very
slightly off but not objectionable for me) .

There is a strange artefact around the bright star lower right of centre
that has got me puzzled. At the moment I've got it narrowed down to a spider
web inside the extension tube I used to achieve focus. Has anyone seen
anything like this before??

http://www.astropics.co.uk/m42.htm

Thank you for looking

Eddie Guscott


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