Alex,
Yes the QHY9's issues have been resolved. Possibly the worst was fogging (and I only experienced it once myself in 100% Relative humidity!). That was before the optical window heater went, problem solved, and now I run it at -20C and without the second optical window. I've also run it at delta -55C to see how well it does - and no problems. I still love the QHY9 and its the right size and profile for the Hyperstar system I'm setting up. We also have QHY to thank for putting some downwad pressure on prices and I'm glad that SBIG have risen to the occassion
My biggest gripe with many recent cameras is that although sensors have got cheaper the cameras have tended to get more expensive! For example the large format Kodak 16803 and 9000 sensors are not that much more expensive than the 1603 and 3200 sensors used in the ST8 and 10 cameras. True the cameras themselves have got more sophisticated.
Anyway, look forward to the ST-8300 to QHY8 comparision.
Terry