Ahh yes but its not a modded camera
Indeed I can see the nebula looks bluish with the 5D's infra red cut filter in place
Here is a 125 second ISO1600 image, with Houghys cooled modded 350D DSLR ,also had a UHCS filter in place. This was a test image taken to check focus and composition, and was done as a jpeg and not modified in any way, this is straight off the camera. 125 seconds with 10 inch f5.6 newtonian.