From: Howard Fink <howard.fink@nyu.edu>

Date: December 8, 2009 3:11:17 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] A keeper

ETX-125 f/15.  I got the focus just right. Conditions were pretty steady at 2am; steady enough to use every frame in the stack.  Registax appears to get confused with too many alignment points, so I used eight in this image, which kept everything sharp except Copernicus at the edge.    The primary reason I use Registax is that I have a pc at work while the macbook pro is at home.  I'm on the pc all day, so it is convenient.

If you want advice, use the whole chip and just concentrate on focus.