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.

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 :).