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Hi Trevor, do you mean like the 1.6x 'crop factor' often quoted for FF to APSc?
I've never really thought about the crop, I just think in focal lengths.
Have worked them out tho, keep in mind that FF and APSc are 3:2 aspect ratio and the 645 and 67 formats are 4:3 aspect so the 'crop' for the vertical works out higher than for the horizontal:
645: 2.5x hor. and 2.8x vert.
67: 3.23x hor. and 3.76x vert.
Crops would be even larger for the 8300 chips.
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