Horsehead M3 Horsehead

Date: April 17, 2001
Exposure: LRGB : 10 x 40s L; 10 x 40s R; 10x 40s G; 15 x 40s B
Processing: MaxIm for Image alignment, DDP, Unsharp, Stretch, and color combine, Photoshop 5.5 for jpg conversion)
Conditions: Average
Scope: C14 @ f/7
Camera: ST-9E, -25°, Celestron 6.3 Focal Reducer
Comments: I had just cleaned the camera and after taking a few test flats, realized just how much dust had collected on the various surfaces. This was done as a test to see if any improvement was gained. You can see the flat comparison here: Flat Comparison