|
The qhy8 pro has regulated and argon sealed chamber.
There seems to be a different chip in the new one plus they have relocated some of the electronics to give better noise handling..... Although I couldn't see any in the old one anyway.
My only complaint with the qhy8 original was the reflection from the ir cutoff filter, it's somewhat more reflective than the astronomik version, and showed up as halos on really bright stars such as m45, dimmer stars are unaffected. This may have been rectified with later versions. I fixed the 8 by installing an astronomik t thread version further away from the chip. No problems now.
I have not seen this with the qhy9 cameras so it's probably fixed.
Further research shows, original 45 deg below and 2 stage cooling, pro version 40 deg below and 2 stage cooling, new l version 35 below and single stage cooling.
All should be good performers from my experience. And at 1600 with a warranty.... You couldn't go wrong.
|