Group Challenge: M42 - The Great Nebula in Orion  
The Great Nebula in Orion

The Great Nebula in Orion(Daryl Doughty)

Acquisition Date : 12/18/09 (10:240s, 10:180s)
02/13/10 (25:300s, 25:15s)
02/17/10 (25:300s)
Camera : Unmodified Canon 1000D
Camera Settings : Manual(bulb), USB EOS Utility control, ISO800
Telescope : Homebuilt 90-mm APO Refractor, f6.7.
90-mm, f10 Refractor Guide Scope, DSIpro1 guide camera, PHD guiding.
Mount : Homebuilt GEM pier mounted. Ed Biers worm gear and worm. Losmandy Digital Drive System with Steppers.
Adapter / Prime / Afocal / Other : Astro Tech Field Flattener, Orion 2" SkyGlow LPF.
Processing Package / Processing Applied : Nebulosity 2 preprocessing (25 darks, 25 flats), aligning and stacking, preliminary processing. Final processing in PhotoShop 7 (compositing and cropping).
Web Site : www.flickr.com/OklahomaProf1940
NOTES : Suburban-urban sky, transparency 3-4 of 5

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