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yes you can use a H alpha filter with a one shot colour CCD.
you will lose 3 out of four pixels but still manage a decent image
There was a fine article on this subject in the Astrophoto insight magazine-I think by Alan Chen ... but I cant seem to lay my hands on this.
There is also a relationship between your system and the optimum bandwidth for your H alpha filter but I cant remember where I saw the original reference..maybe someone else can help
but I have used the 13nm from astronomik with my modded DSLR on an ED 80-it has to be modded of course-and the baader 7nm with my QHY 8, also on an ED80
Dont get the lumicon night sky H alpha filter for a refractor
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