I have been testing two different sensors, using 3 lenses between each of the sensors. I have also kept the exposure to 6ms between each sensor. I noticed a difference in measured DN pixel values between targets for each respective sensor, at the same exposures.
The sensor with a lower spatial resolution has higher DN values of targets. And, the higher spatial resolution sensor consistently has lower values.
Does spatial resolution at all affect the exposure of an image, and thus the measured pixel values? As in, perhaps photons are more distributed amongst more pixels in higher spatial res. images, resulting in lower DN?