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QQHY versus ZWO. I have used both. Both are good.
QHY states a tolerance for orthogonality of their sensor. ZWO does not and I have read several complaints on Cloudy Nights about the difficulties with tilt from ZWO cameras.
QHY also has better banding suppression.
The big one though is the muiltiple readout modes for some of their cameras.
That is really so you can set it up for low noise but less dynamic range for narrowband or large full well depth for objects with bright cores/stars.
You can optimise it for regular LRGB imaging where you want high dynamic range, low noise and good well depth.
The industrial grade sensor is a bonus which may well mean longer life of the sensor.
QHY seems a bit more innovative and comes out with improvements to the firmware.
Greg.
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