Quote:
Originally Posted by rcheshire
Not sure Peter - the camera operation is probably negligable. But heating of the sensor on newer cameras is in the order of 30C and more. Some get outrageously warm. Dealing with the sensor only and ignoring warm up, what power is required to produce a steady ambient of +35C. Keeping in mind that older Canon DSLR sensors run only marginally warmer than ambient ~10C. Depends on camera model.
Can you approximate your wattage based on the following data - though cold finger?
Typical TEC running flat out at less than manufacturer ideal and listed power rating of 60watts, say ~50watts - temp differential from ambient -28C, with a sensor wanting to run 10C warmer than ambient. Therefore, a differential of -38C with reference to the sensor. You will need to do the maths.
This doesn't account for conductive losses, where the camera iself is cooled over time to around 5C. Over 20 minutes, say.
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The variables seem to be multiplying. Add to the mix that CMOS sensors generate a lot less heat than other types. I don't know of any way to monitor the actual sensor temp - at least not in a cooled box design. Any ideas on that?
Peter