RE: [APML] 'challenge'

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

Thom,  I think the main differnce is that we have a close approach of two
separate objects, that will pass and then the event is done with.  When
shooting say M42, its one subject and nothing is moving or changing.

Chris

-----Original Message-----
From: owner-astro-photo@seds.org [mailto:owner-astro-photo@seds.org]On
Behalf Of Thom Iwancio
Sent: Thursday, December 19, 2002 4:56 PM
To: astro-photo@seds.org
Subject: Re: [APML] 'challenge'


Two thoughts, first would be to use a technique like that used for eclipses
with multiple images of Saturn  transiting  (maybe a good CCD tactic).  The
second would be to simply do a hat trick for the Saturn shot and then leave
it covered until Saturn is out of the field of view and resume imaging(
haven't checked the timing/positions to see if this is possible)

 As a fairly newbie to astrophotography maybe some of the more experienced
members could define some imaging ethics.  I understand that is quite common
to say, add a short trapezium shot to a long exposure of  M42. Composite?
How about TP with color or CCD with color?   Where does stacking and RGB
multiple CCD images fit in the scheme of things?

In the purest form of the art wouldn't it be open the shutter, close the
shutter,what you get is what you get one image at a time?

Thom Iwancio
Elgin,  SC
www.machunter.org

----- Original Message -----
From: "Chris Schur" <cschur@cybertrails.com>
To: <astro-photo@seds.org>
Sent: Thursday, December 19, 2002 5:41 PM
Subject: RE: [APML] 'challenge'


> 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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