Hi all --
I've never been able to get comfortable with star testing my Dob. In a well collimated newtonian scope the defocussed star image is supposed to be a bright central spot surrounded by nicely concentric circles. But the view I see varies big time as my eye moves with respect to the eyepiece. What am I missing? HELP! And thanks.
Bob Polcyn
I've never been able to get comfortable with star testing my Dob. In a well collimated newtonian scope the defocussed star image is supposed to be a bright central spot surrounded by nicely concentric circles. But the view I see varies big time as my eye moves with respect to the eyepiece. What am I missing? HELP! And thanks.
Bob Polcyn
