|
The images look quite nice and contrasty so I don't imagine that there is anything too far out.
If you're getting misshapen stars at 6s in the centre of the frame then I'd be suggesting that your collimation might be off a bit. Or at least be off in that part of the sky, it isn't unusual for collimation to shift as you more around the sky.
I'd try to get the centre of field as good as possible before worrying about what is happening as you move towards the corners.
|