Depends on your image scale and if the bayer matrix will hack details in your subs. Also if you want to do NB, an OSC will take a little longer but it can be done. For widefield imaging a mono will always be better but at long FL with an image scale under 1 or around 0.5 then an OSC will do as well IMHO. Unless your optics and mount are top end and your stars pinpoint there will always be plenty of pixels in any single star.
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