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I found the standard heater ring did not work on the qhy8pro because the side of the ring that heats up is pointing away from the front of the camera - towards the coma corrector in my case. A dew heater strap works better. I've tried drying out the guts of the camera by sitting it in a bag with silica gel and had some success however I've still had some internal condensation issues occasionally. It seems to start off ok then condensation forms after 1-2 hours. I can't understand why this would be the case?
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