M45 The Pleiades Cluster M45 with 45 mins each RGB added Dec 15 , this time I have placed less emphasis on the dusty background for a darker and more traditional appearence. Total Exposure time 7 hours Date of Shoot 13th, 16th October, 15th Dec 2012 All exposures unbinned Luminance 16 x 5 min, 15 x 1 min RGB 6 x 10 min ea, 7 x 5 min ea, 3 x 15 min ea QHY9M monochrome CCD cooled to -30C www.astrofactors.com 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