I think I have moisture within the sealed case of the QHY-8
and it quickly fogs up on the INSIDE face of the IR filter
when I turn on cooling on these cold nights.
A homemade dew heater wrapped around the nosepiece /MPCC
arrangement seems to make it dissipate but VEEEERY slowly.
Last night it took about an hour before the dew heater had
made it disappear completely and that was even with a full 12v
and obvious warmth even heating up the camera body.
I have never opened the camera and so cannot work out how
moisture got in.
I suppose it's time to read the instructions and fire up the dessicant
heater for the first time...
any advice would be very welcome.
Steve