Re: [APML] 'challenge'

["John Boudreau" <jeboud@attbi.com>]

----- Original Message -----
From: "stephen pitt" <lthuedk@pe.net>
To: <astro-photo@seds.org>
Sent: Thursday, December 19, 2002 5:30 PM
Subject: Re: [APML] 'challenge'


> Brian and Chris: I understand the spirit of the photographic challenge,
> but also think that two scopes acting simultaneously and using only two
> frames is ethical.  Respectfully, Stephen

Hi Stephen,

This won't work, as your simultaneous long M1 exposure would be terribly
flooded out by a horribly overexposed Saturn. According to S&T, Saturn's
surface brightness is something like 250,000 x that of M1. The M1 shot has
to be taken when Saturn's not in the scope's FOV around M1.

John Boudreau
http://home.attbi.com/~jeboud/astro.htm

----- Original Message -----
From: "stephen pitt" <lthuedk@pe.net>
To: <astro-photo@seds.org>
Sent: Thursday, December 19, 2002 5:30 PM
Subject: Re: [APML] 'challenge'


> Brian and Chris: I understand the spirit of the photographic challenge,
> but also think that two scopes acting simultaneously and using only two
> frames is ethical.  Respectfully, Stephen
>
> Brian Lula wrote:
> >
> > Hi Chris,
> >
> > I agree with you Chris. The real "challenge" is how to optimize this
event real time
> > using innovative imaging techniques. It may not look as nice but that's
not the point. It
> > also makes for a level playing field with Saturn's brightness coming in
to play.
> >
> > Brian Lula
> >
> > On 19 Dec 02, at 15:41, Chris Schur wrote:
> >
> > > I have to strongly disagree with those who say its OK to composite an
image
> > > and think of it as anything like a challenge.  I can do that tonight,
with
> > > an atlas for a guide as to where saturn is going to be, and thats
cheating.
> > > Wouldnt it be clever, if we could think of a way to REALLY get the
image,
> > > real time?  Not some pasted together fake, but an actual image.  I can
think
> > > of several ways to do this.  My first thoughts are to shoot with the
Ha
> > > filter and CCD, and determine the maximum exposure in seconds so
saturn just
> > > doen not saturate.  Than add bunches of those, that can fit within a
narrow
> > > 10 or 15 minute time frame so saturn does not move very far between
shots.
> > > You will end of with (I hope!) a black and white REAL image, fully
> > > appreciated by your peers as a worthy effort to the upcomming january
4th
> > > challenge.
> > >
> > > Sorry I feel so strongly about this, but after Astronomy Magazine
published
> > > the moon-saturn paste up a number of months back, I shudder at the
thought
> > > of what things could come to if this is taken for granted.  I would
like to
> > > hear others thoughts on this, the use of masks for example during
exposure,
> > > or whatever.
> > >
> > > Ok, shoot me.
> > >
> > > Chris Schur
> > >






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