Re: [APML] 'challenge'

["John C. Mirtle" <jmirtle@shaw.ca>]

Thanks Geoff;
    Spreading some light out into diffraction spikes may stop Saturn from
getting as big, as you suggest. There is already a combination of objects in
the sky similar to this upcoming event - Leo 1.Granted, Regulus is not as
bright as Saturn, but then M1 is way brighter than Leo1. I "just happen" to
have a shot of these two at
http://members.shaw.ca/spampit/files/leo1-9-4-89.jpg . (8" f6 Newt, tech
pan, 60 minutes, 13 years ago) It looks to me that if Saturn is right on top
of M1, then M1 is toast - at least for tech pan. Unhypered colour film may
give better results. Leo1 is 20 arc minutes away from Regulus, it looks to
me that a clean image of M1 might be had as close as 15 arc minutes from
Saturn with a 1200mm FL.
    It also looks like most compound optics are out due to reflections
(SCT's, Schmidt cameras, Schmidt newts) and optics will need to be VERY
clean. An interesting challenge that I am almost sure to be either clouded
or frozen out for. :-(

John Mirtle
Calgary, Ab. Canada

----- Original Message -----
From: <astropix@att.net>
To: <astro-photo@seds.org>
Sent: Thursday, December 19, 2002 5:29 PM
Subject: RE: [APML] 'challenge'


Hey Guys...

     Why not just concede the fact that Saturn will be grossly over-exposed
in
any single film shot that reveals M1... and use a diffraction cross to
spread
the light and minimize halation... as John Mirtle did in a similar
Jupiter/M44
transit. See:

     http://members.shaw.ca/jmirtle/m44.htm



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