From: Perry Holcomb <hpholcomb@yahoo.com>

Date: January 11, 2008 7:46:17 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] M42

Dale,

That's a wonderful image!  Shows the great optics of

the ED80 (my fave) plus the super photon-capturing

ability of the EOS 350, as modded, and your excellent

work.

Note your use of the Astronomik CLS filter in the

setup.  Would you give some discussion as to when that

filter should be used??  I live in the light-polluted

suburbs, so maybe your answer for me would be "all the

time."  Or maybe not.

That's why I ask because I'm learning from the

"masters", like you, on this group, and because I have

an ED80 and the EOS 350, unmodded at the moment.

Thanks for this fine contribution.

Perry

--- Dale J Martin <dale@massapoag.com> wrote:

Hi all,

Here is yet another image of M42! The weather was

nice to me last  

night and I was able to get some time on M42.

http://tinyurl.com/2fbwx7

Atlas mount tracking with Astro IIDC

ED80 with Hap modified Canon 350D,Williams Optics

.8X focal reducer/ 

corrector, with Astronomik CLS Filter.

20 frames at 10 minutes

5 frames at 30 seconds

5 frames at 15 seconds

Thoughts....... comments welcome.

Dale

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