Hi all.
I have previously "upgraded" my C11 OTA by installing ventilation fans, mirror lock & flocking. This process required me to remove the primary mirror as well as the corrector plate / secondary. When I put everything back together, I did my best to ensure that the corrector plate was positioned as close as possible to its original position.
I recently performed a star test which seems to indicate that I'm suffering from spherical aberration (clear diffraction rings on one side of focus but blurred on the other). I have captured this in the following link:
https://www.youtube.com/watch?v=gmFUJRro8DE
My question is, could this spherical aberration be caused by a slightly incorrect placement of the corrector plate?
Any other ideas as to what could cause this?
Cheers
Matt