Is diffraction an increasing worry? Or, what's wrong with more megapixels?

Started Feb 27, 2013 | Questions thread
Chris Noble
Chris Noble Senior Member • Posts: 2,185
More resolution = more noise

More sampling (signal-noise ratio) noise, and each pixel has a thermal noise floor that does not get smaller for smaller pixels.

The undersampling when you go from input (sensor data) to output (print or display) will reduce the noise somewhat, but not perfectly. So the least number of pixels (for a given sensor area) that gives you sufficient resolution for your ouput is optimal.

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