Stay alert, control the camera, save photos
- Aug 16, 2012
If you used my formula, you misapplied it. I wrote that "The 21 mpx sensor has 6.4 µ pixels, the 50.6 has 4.14 and so the expected increase in spatial resolution is 6.4/4.14 = 1.54."I used your own formula, i.e. when we double the number of pixels, the resolution gets multiplied by the square root of 2. So the factor is sqrt(2)/2.
My formula, which is simply that spatial resolution scales as the sqrt of the pixels per same size sensor, gives the same result within rounding errors: the expected increase is sqrt(50.6/21) = 1.55.