This image is a combination of 4 layers. Layer 1 6- images each with an exposure of 300 seconds through a RED filter. Layer 2 6- images each with an exposure of 300 seconds through a GREEN filter. Layer 3 6- images each with an exposure of 300 seconds through a BLUE filter. This used 2x2 binning. Layer 4 19 - Images each of 3000 through a Luminance filter. Each image was corrected with a dark and flat. The images were taken with a SBIG STT-8300 3 CCD attached to a Centurion 18" F/2.8