Posted By Rod Nabholz
I cut a disk out of a manilla folder matching the inside diameter of the dew shield and inserted it in the shield up against the front of the lens cell. The center marked for reference.
It seems that indeed the focuser is not square. The laser's dot misses the center mark by about 3mm. (4" f10 by the way)
My question: Is this enough error to worry about? The focuser is not adjustable so I will have to undertake some work to bring it true, and am wondering if I will see a noticable improvement in performance for the trouble.
By the way, I also got multiple return dots on the laser (EZCollimator) so I am also wondering about the cell's alignment too.