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Thanks guys.
Rob, the Astrodons seem fine on images where there is no really bright star.
The Astronomiks may be fine, I have some but haven't had a chance to use them yet. Mike uses Astronomiks I think and I don't see reflections in his images. I must say I was annoyed they don't supply a spacer to make their thin 50 x 50mm filters fit in the filterwheel. grrrr.
There are new Baader filters that may be the best around now. They are parfocal, they are equal exposure times like Astrodons but they don't do reflections and they are nicely separated one colour from the next.
Also with the larger chip cameras like the 16803 and 09000 chips, reflections halos for some reason become a major issue. I have seen some shockingly bad images from Astrodons and refractors using a field flattener. All scopes virtually except RC's need field flatteners from STL11 on up.
Greg.
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