[Lee]

I'm working at getting my f/4 newt imaging again. I've always struggled collimating this thing, and picked up a Glatter laser several years ago.

The image shows the view in the focuser window of the reflected barlowed laser. I've labelled it for easier discussion.....

There is the shadow of the centre spot, which seems to be in the right spot, and the concentric lined pattern, way off centre?

I only use a small sensor on this scope, so don't need perfection, just (mostly) round stars will do!

Thanks for any help...