Thanks Dave,
Ahh, yes the Bahtinov mask. I think I need to pick one up, I do remember reading about it, then it went into the background. I think there is one for the CPC1100, even here in Perth.
The part I am clearly not sure about, are the flats, darks and bias frame sequence. Are you able to step that out a bit, and explain what I need to do there? I remember one saying you had to put a white t-shirt over the scope and take shots, and one with the lens cap on etc. Not my strong point clearly.
I think if I can get those areas down pat, I should be right to go. My one shot of the Trapezium, sort of looks like this:
https://www.astronomycameras.com/blo...trapezium-m42/
So, I think I am on the right track. Just need to get the other areas sorted, and some sort of routine going with ASIStudio.
Your post helped me a lot.