Well, I never got a response from OMEGA - so be it.
As I cannot justify the expenditure with premium Astrodon filters as my CCD camera is only worth $1k, from those using 6-7nm filters from light polluted inner Melbourne or Sydney, what have been your experiences?
I could justify something like this 7nm from Optolong:
https://www.myastroshop.com.au/produ...p?id=MAS-001K3
http://astronomyconnect.com/forums/a...rgb-filters.9/
John K.