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Old 11-09-2018, 07:46 AM
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bojan
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bojan is offline
 
Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,940
Not necessarily...

It seems your secondary or your focuser may not be positioned properly.


I would suggest you to start with the focuser - remove the secondary and see if laser beam is pointing at the place exactly opposite the focuser... and adjust that.

Then put the the secondary back in place (make sure it is offset away from focuser to avoid vignetting) and adjust the laser beam to point to the centre of the mirror.. then adjust the returning laser beam such it is hitting the secondary at the same spot by tilting primary.
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