Most of the popular astro cameras will work on the RPi with Ekos.So the choice of camera really comes down to what sort of objects you are interested in, the sort of onditions you image under and how you wantto display your images.For example, if you are interested in emission nebulae a cooled mono camera with large field of view and narrow band filters would work best. With planetary you would want a color camera with small pixels and video capable.
 

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