RE: [APML] The Orion Region

["Thomas W. Earle" <twade@bmi.net>]

John,

Yeah, E200 should result in significantly more red nebulosity.  I
haven't quite made up my mind which combination of film I'm going to
use.  I have two possibilities:

	1. Provia 400F and E200 (both pushed 1-stop)
	2. Provia 100F and E200 (both pushed 1-stop)

Provia 100F should capture the Witchhead nebula better than Provia
400F since Provia 100F is more blue sensitive; however, pushing it
1-stop will still require very long exposures (i.e. 120-150 minutes
at F/5.6).  This will force me to have near perfect polar alignment
which is difficult with my current setup.  Hopefully, by next
winter, Astro-Physics will have their new 
Heavy-Duty Azimuth Adjuster Upgrade Kit for 900 Mounts. 

As you mentioned, I do plan on taking 2-3 exposures for each section
and stacking them, even more around M42. 

Wade


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