Quote:
Originally Posted by Lee
Thanks gents....
Laser dot hits primary in centre, yes.
Should those concentric circles be centred around the centre spot shadow and centre of viewing window? That seems logical to me.
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Can you post an image of the laser dot centered in the primary?
What is generating the concentric circles? Is that an attachment on the front of the laser? If so, you should remove this for the barlowed laser primary adjustment.
I've attached an image of my Glatter barlowed laser view of the primary. In my case I have a catseye hotspot rather than a ring on the primary so the shadow shape is different however you can see how the barlow should smear out the laser light to create the shadow centered on the hole in the tublug.