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Trevor,
Both ZWO and QHY are built for a price and both do the job they were designed to do ie:capture pretty pictures of the universe.
I really don’t think one is better than the other in regards to capturing pictures of the universe. Either brand have had their fair share of problems since they came out on the market which is typical for new products where QC is somewhat questionable.
I’ve been using ZWO for 6 years now ( 120MM , 290MM , 2600MC and 2600MM plus EFW and EAF’s etc.. I don’t use an ASIR air ) and although I was one of the unlucky ones who had the dreaded leaky thermal grease pad in my 2600MC , it was fixed in a timely manner and the problem has never returned.
My new 2600MM is performing beyond my expectations as with all the other equipment.
You really can’t go wrong with either Brand and the only limitation should be budget and availability.
Cheers
Martin
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