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the reson why im quite sure of my collmination is 3 different people had a crack at it, using
Laser and Barlow laser method
Cheshire eye piece method
and pure laser method
all three ways where so close it wasn't funny. This is the first time i have ever seen this and mind you i have taken alot of shots with nice round stars, my latest shot of 47 tuc had round stars and that was less than a month ago, and when i was seeing if i could reach focus everything was perfect, its only just changed so .... it hsa to be something on the mechanical side of things is all i can see that has changed. very confusing!
so what am i going to try.
see if the focus tube is parallel when rising from the main axis first, i could understand how the egg stars would arise if the dslr chip plane was tilted by a miniscule amount.
put my laser in to see if it is moving around on the primary with the focuser being racked in and out.
failing this i will see if the focuser is square to the secondary, then check if the mirror is crimped at one of the 8 mirror clamps.
would there be anything else to try after this do you think?
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