This is an incomplete version of the entire constellation of Orion. I have gone a bit hard with the Ha data, which I will dial back somewhat for the final version. There is some non-Ha dark and reflection nebualae that has been misrepresentated and underdone. But here goes
Be careful - it could burn out the red cones in your retina :/
https://www.flickr.com/photos/130830...posted-public/
Details:
Canon 6D (full spectrum modded), Astronomic 'L' XL clip in filter, Zeiss 135mm f2.0 APO, AstroTrac.
ISO3200, f2.5 with shutter speeds 4x3s, 4x8s, 4x30s and 8x90s for each panel aligned using PT Gui for each sub in a panel, then again to align panels for overall mosaic.
Ha data is as above except using Astronomic 12nm Ha XL clip in filter with 12x210s exposures (stacked using Deep Sky Stacker)