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OK, Thanks for the

OK, Thanks for the explanation.
If you would write the formula to compute (estimate) the pixel pitch then, would you use raw_width or width ?
raw_width seems to be more the good one but for canon it gives result pretty far from the vendor value:

pitch = 22.3/6288 * 1000 = 3.55 (while it is given to be 3.7)
At the opposite, for the Sony it gives better result.

Not that easy :).