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APM/TMB115 @ f/7 
Atik 383L+ 
Atik EFW2 Filter Wheel Atik OAG 
Baader RGB/Ha filters Losmandy G11

B=21x10min Ha=18x20min 
Total exposure=11.5hrs For this image the Hydrogen-alpha  was combined with the red channel to create a master R channel. RGB channels were blended with the Ha to create a master luminance channel. Sub-exposures calibrated, aligned and combined in DeepSkyStacker Final processing with Photoshop CS3: levels/curves stretching, reduce noise filter, smart sharpen filter, high pass filter Carboni Actions: vertical/horizontal banding noise reduction, make stars smaller