ZWO ASI120MC - Newton Rings Is There When I Do Ha-Solar Imaging

ASI Camera FAQ
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After that, make sure you click the correct camera name.
4. Newton ring is there when I do ha-solar imaging.
This happens because the sensor is not parallel to the ha filter, there are 2 ways to solve it:
1. Use a M42 Tilter as this picture, so you can adjust the angle of the camera: