I've had a couple of clear nights lately, so I took advantage of it and shot some images of M42 (the Orion Nebula). The first image was made by combining shots using Luminance, Red, Green and Blue filters. The second shot was made using Narrow band (5 nanometer) filters, including Hydrogen Alpha (Ha), Oxygen III (O3) and Sulphur II (S2). The Narrow band image used what is known as the Hubble Pallet where Ha is assigned to the Green Channel, O3 is assigned to the Blue Channel and S2 is assigned to the Red Channel. This makes for a more scientifically useful image but not what our eyes would see. It also makes the star colors look a bit funcky, so I subtracted out the stars from the image and added in a copy of the stars from the standard LRGB image. All images were taken with a cooled mono-camera and a canon 500mm F4.0 lens, that was guided with a separate guide scope. Due to the large dynamic range of M42 the images were processed using HDR techniques to prevent blowing out the center of the nebula but still allow the dim regions outside the main nebula to be seen (The narrow band image really helps bring out the dimmer areas). The HDR also brings out a lot of detail in the structure of the nebula that is visible in the double download of both images. All questions comments and suggestions are welcome.