Hey Nick, thanks a lot for your reply. Yes, I know the ASI120 mini mono is probably the better choice in terms of guiding, but as you say, it is also much more expensive, which is why I wanted to try the RPI HQ first. I had previously used an even cheaper microscope camera, which can only expose 1/10s. Even with this camera, guiding was possible, only with bright stars, but the result was satisfactory. What didn't work is the Polar Alignment Assistant, because it was just not sensitive enough. With the RPI HQ it should work I think. If you also own Stellarmate OS I would be very happy if you could try to connect your camera to it and report how and if it works.
Greetings, Marc

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