Hi,
This is the "Green" version of Orion nebula (M42) in Ha, SII and OIII bands. About 6 hours of exposure with FLI Proline, Astro-Physics 155 + AP field flatterner. Captured with CCDAutopilot 5 through Maxlm. Guided with Takahashi 60 FS and Starlight Express Super, Paramount MX mount. Processed with PixInsight and PhotoShop CS6. Bias, Dark and Flat frames calibrated. Diffraction spikes are artificial, I like them though.
Taken on the nights of 25 September and 24 October 2013. Backyard observatory, Turramurra, Sydney.
High resolution at Astrobin:
http://www.astrobin.com/62743/
Thanks for looking.
David