Thanks Alex,
I've tried every setting imaginable and after a certain time noise shows up. Just the nature of the Toucam I guess.
The Orion neb shows burnt out centre after only 2 - 3 seconds! and at that timing no nebula is visible. Anything over 5 seconds and stars start to bloat too.
Just for the fun of it, here is a composition of my above Orion and one of my old Trap shots resized to match and blended in PaintShop Pro