This mosaic consists of two parts with 6x900s and 4x900s each. Focal length was 660mm at f/5.2. A color camera QHY8L with 7.8mu pixels was used. More infos at: http://en.wikipedia.org/wiki/California_Nebula
HaRGB Image, Ha=3x600s, R,G,B=300s each at 660mm focal length, f/5.2
