This image is a combination of 3 layers. Layer 1 17- 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. The images were taken with a SBIG STT Camera attached to a Centurion 18" F/2.8 and were corrected with both a dark frame and a flat field.