Skywatcher Quattro 8CF on an HEQ5-Pro, CentralDS Astro60D at -10C with an Astronomik CLS EOS-Clip.
Guided shots of 5x5s plus 5x10s plus 5x120s plus 5x240s.
Flats and Bias frames but no Darks.
Stacked and initial processing with Images Plus, combined with PhotoMatix and Photoshop CS6, finished off with Picassa.
Messier 42 never fails to impress along with its companion, the Running Man Nebula.