This image is a combination of 4 layers. Layer 1 15- images each with an exposure of 300 seconds through a RED filter. Layer 2 17- images each with an exposure of 300 seconds through a GREEN filter. Layer 3 17- images each with an exposure of 300 seconds through a BLUE filter. This used 2x2 binning. Layer 4 45 - images eachwtih an exposure of 300 seconds through a luminance filter. This used 1x1 binning. The images were taken with a SBIG STT-8300 3 CCD Camera attached to a Centurion 18" F/2.8