Hi everyone
I have a 10" RC that is also fitted with a Moonlite focuser (with the collimation adaptor plate). I have tried collimating the optics many times utilising a Takahashi collimating scope and also the Howie Glatter laser. Those steps appear to be reasonably successful however when I re install the OTA onto my mount and connect my cameras, I see that the defocused stars donuts are slightly brighter on one side. This messes up SGP autofocusing routine that picks the bright sides as in-focus stars amongst a lot of out of focus stars.
My question is when trying to fine tune the collimation using a star - do I adjust the primary mirror, the secondary mirror or the focuser collimating ring?
Any tips welcome as I have now lost all remaining hair!
