c11 + hotech coll.
evening members i am hoping someone familiar with firstly a c11 and secondly the (amazing) hotech collimator
to begin i watched the youtube tutes and to check focusser orthogonality the man undid the clamping ring at the front and removed the secondary, scary but i gave it a go but the whole unit turns in the corrector!....... oops!
anyhow really got to know the basics of it all
so we decided to bypass that bit and got to play with the the three collimating screws at the front, but one of the returned laser reflections was more out of focus than 'tuthers and had a doughnut hole in it (see picture)
also focussing on the the back reflector only seemed to show two laser point converging and not the third and it was not focussed in the middle of the screen (fucusser non orthogonality?)
any tips?
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