Quote:
Originally Posted by strongmanmike
Yes but the focus difference was between colours, I found on occassions I felt needed to tweek the blue focus..? Not sure if this was the filter or the colour correction of the APO lens, I always suspected the later 
Nice shot Alan, I would love some time back in my dome too 
Mike |
Thanks for clarifying that Mike.
Just to take this a bit further (sorry for the thread hijack Allan) - have you seen less focus difference with your new scope, or does the corrector cause similar issues? Am I safe to assume that if you can see focus differences for a high end refractor, you will need to refocus for each filter if your imaging train includes any lenses?
Ta
DT