![]() If we fill a second Petrie dish to the same depth, both dishes can be described as representing the same exposure. The depth of the water represents exposure. Fill the dish to a certain depth with water. Imagine a camera sensor as a shallow Petrie dish. Here's a visual that can help a person visualize how this works. The more total light captured, the better the signal-to-noise ratio (SNR) in the resulting image. ![]() ![]() ![]() Noise, as I've said, is determined by the total amount of light captured. "The light intensity remains proportional to the size of the frame." That's exposure, which I've already addressed in my original comment and in my response to RolliPoli.
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