Ok and bit of an update for everyone.
After tests I have come to the conclusion (obviously with the assistance of others..a big thanks to them) that there is an issue with the Optics on my 127ED.
It has a prominent blue/violet flare on stars (across the field) when at perfect focus. Yes I can re-focus most of this out but it is at the expense of defocusing stars.
I have performed star alignments, Cheshire alignments, focuser alignments and lost of tests with CCDInspector.
Gilman previously sent me an article on Lens alignment and I have fiddle with this (a little) with no change. This does not appears to be a main lens alignment issue as the star test is quite good. What is causing this?...who knows?...in my limited opinion it looks as if the centre lens may be causing this aberration.
I have more pics and a video of focus on
my Picasa page if anyone is interested.
Anyway I've sent an email to Gilman asking for replacement scope (send mine back) or lens cell exchange.
So ATM it's all in the lap of the Northgroup. Lets see what eventuates.
edit:
I think I'll take my frustration out on the cat...oh..we don't have a cat...maybe Emma then!
