Thanks people
Yes that is Amp glow, that wasnt fully removed with flat fielding, as it was not a cold night and was a fair bit of dark noise and amp glow. Some more shots I took last night.
A shot of Eta Carina this time with a Lumicon Deep Sky filter, and better focus.
http://www.users.on.net/~josiah/temp/etadeepsky.jpg
Also NGC 2467
http://www.users.on.net/~josiah/temp...67deepskys.jpg
Looking fowards to winter nights, less amp glow and thermal noise
Normally I use either shorter exposures or lower ISO speeds, but the filter factor requires me to triple exposure times. The Cometracker 6 inch f3.6 Schmidt Newtonian was a very inexpensive scope when it was out, sold as tube assembly only. Sadly Meade discontinued them, though there is a 6 inch LXD model I believe, though sold as a complete scope and mount.