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Easy answer:
Try it and post the RBG images for comment/ discussion.....
(with the spectroscope and a 600 l/mm grating, the spectral range coverage is 70nm - the loss of detail across this range is minimal)
The RBG coverage (assuming a good UV-IR also) would be roughly blue=400-500nm, green=500-600nm, red=600-700nm.
The amount of "out-of-focus" would vary for each filter depending on the chromatic curve for the achromat being used.
Last edited by Merlin66; 08-12-2017 at 11:22 AM.
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