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The caveat here is that large format has rather shallow depth-of-field, and if you stop way down then diffraction limits your resolution. There is somewhat of a resolution advantage from moving to larger formats, but it's not as large as you'd think when comparing to an equivalent depth-of-field with a smaller format.

The counter-caveat is of course that large format is often shot using camera movements that allow the line of focus to be creatively placed to make the most of the smaller depth of field, so stopping down an equivalent amount is not always necessary.

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