This image is a combination of 3 layers. Layer 1 11 images each with an exposure of 300 seconds through a Hydrogen Alpha filter. Layer 2 17 images each with an exposure of 300 seconds through a Oxygen III filter. Layer 3 12 images each with an exposure of 300 seconds through a Sulfur II filter. The images were taken with a SBIG STT-8300 3 CCD Camera attached to a Centurion 18” F/2.8 and was corrected with both a dark frame and a flat field.