Quote:
Originally Posted by pmrid
Does anyone have any idea roughly how much heat (in Watts) a DSLR will generate over a long session. Assumptions:
Using an external power supply not battery
Saving to PC not internally;
Monitor turned off.
The context of the question is that I know the cooling capacity of my peltier assembly. With the assembly I have on order from the States, if I require a DeltaT of say -15C and with an external/ambient of 25C, I would have about 9 watts of cooling capacity available. So if a DSLR produces say 5 watts (a guess entirely), I have about 4 watts of cooling capacity.
Peter
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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.