From: "jimchung2338" <jim_chung@sunshine.net>

Date: January 10, 2010 7:52:22 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: Mars from Toronto (now Mars from Jan10)

Hi Willie, thanks!

I was out again this morning at about 1:30 and seeing was good and no wind turbulence so I was able to stack 130/1300 frames per channel at f15.  I took the plunge and double stacked my barlows to get at least f30 (maybe even f50 looking at the image size) and the limits of seeing became very apparent.  I found that I had to hand select my sharpest frames because AstroIIDC seemed to be confused by the presence of dust motes perhaps giving false sharpness values.  

http://tech.groups.yahoo.com/group/Astro_IIDC/files/Planetary/MarsJan10c.jpg

I had wanted to compare how my C8 on a GEM would compare but it was getting a little too cold.  The 12" mirror was definitely instrumental in shooting Mars at 15 fps at 8 metres focal length!

Jim