From: "Milton Aupperle" <milton@outcastsoft.com>

Date: July 27, 2009 1:25:16 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: M11 Image

Hi Folks;

I am cleaning up my imaging session images from last week before archiving them. The moon is brightening and the weather is not looking good for the rest of the week.

Here is a shot of M11 I took July 18:

http://groups.yahoo.com/group/Astro_IIDC/files/DSO/M11_LRGB_20090719_055459U_MJA.jpg 

Image scale is 1.16 arc seconds per pixel and sky background for the Luma was 10,000 out of 65,535 for a 7 minute exposure - without an LPR filter. Seeing wasn't as good as M56 and I had burst of turbulence jumping +/- 6 arc seconds.

Same rig as I took M56 and M 15 with - C8 1149 mm focal length, Grasshopper 1384x1036 mono 16 bit camera cooled to +5°C, AstroDon E series LRGB filters, 7 minutes Luma, 8 minutes Red, 6 minutes Green and 6 minutes Blue.  Guided via Astro IIDC 4.05b3 using a Flea color camera on a Celestron OAG, GPUSB interface on a "tuned" HEQ5 GEM. Stacking, alignment, processing (color balance, levels, sharpening) all done in Astro IIDC.

Clear skies..

Milton Aupperle