I have a 6D and lenses and a small Sony camera (RX100VI) of which the latter makes good widefields despite its relatively smaal sensor sizr.
On DPReview I stumbled upon a thread using a Canon Powershot SX530HS superzoom with a 1/2.3" sensor making nice astrophotos. Yes, with the camera, no telescope used.
Link to the astro gallery of the TO of this thread: http://starrydave.com/?page_id=1135
But the RX10MK4 (or even MK3), which is similar, but has a larger sensor (1" like the Sony RX100 series) and a larger lens in mm aperture than the Canon Powershot.
Are there any experiences with such astrophotography with this Sony camera ? That makes astrophotography life easier.