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A point to bear in mind is that both refractors you mention are achromats which means they are not as colour-corrected as a triplet or better. That means your dual-band filters are likely to show some bloom around stars. That’s because the red and blue components are not coming to best focus at the same place.
The Ha bandpass in filters like the Enhance is comparatively wide (about 20nm or so from memory; and the blue/green bandpass is even wider I think.) If you compare results with a mono ccd and discrete NB filters, the difference will be quite marked.
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