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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Reciprocity failure? (1 Viewer)

No they shouldnt. CMOS and CCD chips are linear devices.
The nearest thing you will see is blown highlights where the pixels are fully saturated, so provided you dont overexpose, the response will be linear, and there may be a siilar problem at low levels where the noise may dominate the signal.
 
Wot Phil said.

But note that for long exposures thermal noise, from the amp etc, will become obvious, and you will need to do dark frame subtraction. (On a Nikon you just select long exposure mode, and it takes a second exposure with the shutter closed. I'm sure it is the same in Canon land etc.)
 
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