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You're absolutely correct about the QHY9's performance on the HH shot - there's some detail resolved in there I haven't picked up on before!
Back to topic - the Cooled 40D v's QHY9 results.
The resolution from the QHY9 has the edge obviously, but the 40D is capable of 18deg below ambient and it gets pretty cold in the Adelaide Hills of a winter's evening! It was 7degs last week - so there's a possible -11degs where noise would be tamed further.A considerable improvement on 0degs I'm sure.
Thanks for the efforts Phil - there's no denying the power of that QHY9 though...very nice.
Doug
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