Hello..i am new to astrophotography. But i as per my expereince till now i can say you can buy StellarMate and it (RPi3) comes completely packaged with everything including StellarMate OS, Kstars planetarium and Ekos observatory control. You can also use Kstars on your laptop and remote connect to Ekos on the device. I had the best expereince with this.

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