Sounds to me like I can calculate the force I will transfer to your head with a stick moving at 20mph, but you won't believe it until I actually boink you over the head with said stick and you gain a headache

It''s not all that complicated IMHO. The 1st 2 renders show what a fullsize sensor would receive from the scene. Just placing a smaller sensor in that place (i.e. the cropped version) shows what the sensor would receive on the 1.5 cropsize sensor.  I didn't make up the measurements, I looked them up. So yes, the physical size on your sensor will be different. But the end result when viewing/printing the picture will be the same. Sure there is a slight discrepancy because the actual cropfactor isn't 1.5.. it's something like 1.51 or 1.52. depending on what side of the sensor you measure.

What is a friend? A single soul dwelling in two bodies. - Aristotle
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