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I haven't used a QHY camera and have a ZWO 183mm.
When I was researching the 2 brands I would here about driver issues with QHY. Another poster said that was in the past and that it had been sorted.
Another common response was QHY has a higher build quality.
Depending on the model there are other differences.
The QHY600 for example has a 2gig DDRAM whereas the ZWO has 256mb.
The QHY600 has currently 3 different modes, one of which extends the full well depth from 51K to 75K or more.
That could be useful in high dynamic range scenes.
Other aspects seem similar but QHY are about US$500 more expensive for the QHY600 model compared to ZWO.
So still not that clear cut but its more data to consider.
Greg.
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