Thought to add a pic ( actual saved jpg from the QHY10 C) of the latest field since de-stressing the mirror - still has some Diagonal curvature ? Weird hey ?
I am also assuming the Baada MPCC (Multi-purpose-come-corr) is somewhat the wrong distance from the chip, , either under/over correcting ?
I have used this exact system some yrs sgo with excellent results from the corrector, but for the life of me cant remember where was on the image/focal-train it was ?
Is there a web page relating 'spacings for baada correctors' or similar about ?
I may need refreshment, or do a search myself when time permits, I know this type -thing has been discussed a few times, so I should be able to find something without too much drama !
Ohh, yes, some more collimation needed, yes, but want a flat field 1st !
I am also considering taking out the LP Filter, as I haven't used it in this system before as last time use was in Dark Skies, just to help isolate where this problem is coming from, Re very long stars in opposite corners, but hardly any in the others, Hmmmmph
