|
This procedure has been done several times and the primary is out of alignment. You can determine this easily on the bench by simply sighting down the tube and comparing the secondary fixture with the baffle tube. It is evidenced by a significantly distorted airy disk (not the rings but the total disk) when sighting on off focus star.
As I said I have tried to adjust this out by moving the cell and adjusting the screws but on tightening they simply move the cell back into its natural position by virtue of the bevel they tighten onto.
Secondary collimation is easy. I have done it many times in the past, but without a correct primary alignment there is no way secondary collimation can adjust it out.
Clearly, there is a mechanical distortion that has developed over time on the primary alignment.
|