Here is a most unusual version of M42 "The Great Nebula in Orion" this time using the CFHT Palette (Canada France Hawaii Telescope) technique, the channels are assigned with H-Alpha = Red, OIII = Green and SII = Blue Total Exposure time 12 hours. Date of Shoot Nov 19th, 29th, Dec 3rd, 5th, 11th and 14th 2012 All exposures unbinned H-Alpha, OIII, SII 7 x 30 min each H-Alpha, OIII, SII 30 x 1 min each QHY9M monochrome CCD cooled to -30C Thomas M. Back TMB 92SS F5.5 APO Refractor Paramount GT-1100S German Equatorial Mount (with MKS 4000) Image Aquisition Maxim DL Stacking and Calibrating: CCDStack Registration of images in Registar Post Processing Photoshop CS5 Clear Skies Terry