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

Date: January 31, 2009 3:18:13 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: M37 Image

Hi Folks;

I think I finally have my L R G B exposure times and processing

figured out for the EXHAD Grasshopper camera.

Check out M37 (taken at -22°C ambient temperature):

http://groups.yahoo.com/group/Astro_IIDC/files/DSO/M37_20090125_MJA.jpg

Details are embedded in the image. I did have an electric blanket

turned on and wrapped around the gear box of the HEW 5 mount, which

eliminates the "grinding gears" issues below -15°C when slewing at

900x times siderial for the GotTo.

I found that when using the Hutech IDAs LPR filter with the AstroDon

"E" series LRGB filters, I need to use exposure times of roughly 1.3

Red, 1.0 Green, 1.0 Blue. I may increase the blue color channel a bit

more in  future imaging session (I think it's a bit low), if the wind

ever stops blowing.

It's amazing how much you can underexpose, blur and soften the RGB

color channels and still get decent colors out in the LRGB combined image.

TTYL..

Milton Aupperle