[tornado33]

With the comet past the meridian and my tube on the other side of the german equatorial mount, there is less reflected light entering the focusser, so I took another set of 10 images as before, only this time I removed the uv/ir filter so its "full spectrum" near IR through visible light with the modded 350D
This is a full res. crop.

Ironically on the full image I was left with a negative comet at the top as when doing the flatfield (skyflat) I didnt quite move the comet out of frame.

Gee when I first got into astro imaging Id be happy to get a NIGHTTIME image of a comet this bright.

2nd image is a upsampled close up of the central condensation,

Scott

PS, Terry I note you were doing 2000th sec images, your skies must be darker, free of haze? 2000th sec @f5.6 were overexposed here.