Here is a recent image of M81 and M82 that I took using a side by side configuration consisting of one Monochrome debayered Canon 60d and a full spectrum 550d. Both modifications were performed by Brent Oliver of Hypercams and Mods. Both cameras are using the Samyang 135mm F2 lens wide open at F2. The dust that you can see in this image is known as the IFN, integrated fulx nebula. It is a spanse of dust that separates our milkyway galaxy and othere neighboring glaaxies. It does not actually emit light and is made up of a molecular dust structures containing hydrogen, carbon, helium, and nitrogen. The reason that we are able to see it is because the milkyway emits light whihc is reflecting off of the surface of the IFN. It is a difficult structure to capture because the IFN is so faint that it just barely sits above the cameras read noise level. With dark skies, fast optics, a correct amount of integration, and good processing you can pull out the ifn. Hope you enjoy this one.
104x40s mono 60d iso1600 -69.3 minutes -CLS CCD filter
104x50s RGB 550d iso 1600 -86.66 minutes uv/ir cut filter