Re: [APML] Mars and the Helix

["Bobby Middleton" <bobm@koyote.com>]

Gee you guys have some really good skys up there around the observatory John
<g>.
Nice shot of the Helix and mars even with the neat internal reflections
Bobby Middleton

baloney detection:
http://www.koyote.com/users/bobm/Baloney%20Detection.htm

----- Original Message -----
From: "John C. Mirtle" <spampit@shaw.ca>


> Thanks Steve,
>     This shot nicely illustrates the one big flaw with Schmidt cameras -
> pincushioning on bright objects. I used a red filter both to bring out
more
> detail in the Helix, and to reduce reflections from Mars. Guess I should
> have used a narrower band filter!
>     I will probably leave the shot as it is rather than attempting to fix
it
> up. Removing scratches, fur balls and satellites from a shot is one thing,
> but changing an image to that extent is another. Interesting idea though.
> This is art more than science, and I do have a non-Mars version of the
> Helix..... Generally if I am going to replace huge swaths of an image, I
> prefer that it be blatantly obvious that it is an artsy doctored image,
like
> this one:
> http://members.shaw.ca/jmirtle/m13-wco.htm So I guess the question would
> be - is this cheating, or just restoring the image to what it should have
> been?  :-)
>
> John Mirtle
> Calgary, Ab. Canada
>
> ----- Original Message -----
> From: "steve banbury" <banburys@sonic.net>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Sunday, August 31, 2003 9:01 AM
> Subject: Re: [APML] Mars and the Helix
>
>
> Hi John--wow, there's certainly some interesting artifacts in that shot!
> We're
> totally fogged in down here in Saratoga, so not even a chance to try a
> refractor
> on the duo.
>
> Looks like one needs to do a superposition of a good short image of mars
and
> a
> longer one wiith the helix--or would that be cheating?
>
> Steve
>
> "John C. Mirtle" wrote:
>
> > Ken,
> >     Thanks for the heads-up. I had a shot at it on Friday night. It
looks
> > like 17 minutes with a Schmidt camera gets you really a lot of Mars! I
> used
> > a Wratten 25 red filter to really bring out the surface features. I
think
> > that refractive optics might give a cleaner image.....
> > http://members.shaw.ca/jmirtle/mars.htm
> >
> > Anyone else get this duo?
> >
> > John Mirtle
> > Calgary, Ab. Canada
> >
> > ----- Original Message -----
> > From: "Webb, Ken (USF Lakeland)" <kwebb@lklnd.usf.edu>
> > To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> > Sent: Saturday, August 23, 2003 1:44 PM
> > Subject: [APML] Mars and the Helix
> >
> > Hi!
> > I was wondering if anyone on the list was going to attempt to image Mars
> and
> > the Helix nebula during the next dark period? I noted that they are
about
> 4
> > degrees apart this next weekend and may present a nice photo op for the
> > Schmidt guys. I am hoping to attempt a shot at it with a 300mm lens
> (weather
> > permitting) this next weekend. Any takers?
> > Ken
> >
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