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[QUOTE=Omaroo;582953]Pete - with my ST-8 I found that if I started the camera and ran it at ambient for 10 or 15 minutes, and then, in 5 degree steps 5 minutes apart made it down to zero and then into negative temps I rarely frosted. Reaching your goal temperature over time is the key in most cases - the more humid/dewey it is, moreso.
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This is curious. With my ST10XME I just turn it on and push it straight to -25 as fast as possible. I do use a water cooler and this may help.
I never get any frost.The camera is permanently on the scope.
I will get dew on the secondary if I don't use a heater but never anywhere else.
This is in cold Armidale.
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