BTW I had the opportunity to test the upgraded CG5 mount and controller from my balcony, and I'm very pleased. The ONSTEP project is truly amazing!
I captured numerous 120-second frames with my Celestron C8 using a Starizona x0.7 reducer (1430mm focal length), and all of them had rounded stars. The RMS ranged between 0.45 and 0.7. I guided the setup with a 50mm guider. I achieved similar results with my ZWO AM5 mount:).
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