Apparently it's 6.4uM. But the sensor as a whole is full frame - 24 x 36mm. Webcams have much smaller sensors, I think so the pictures produced there will be correspondingly larger, I suppose.
Edit; Ugh, I phrased that really poorly. A smaller sensor placed at the focal plane will capture a smaller portion of the image formed there, thus the captured image would look larger.
Last edited by Stonius; 18-05-2016 at 08:07 PM.
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