jonnyapple:
What makes getting AF sensors to function on the edge of the FX frame harder than getting them to function on the edge of the DX frame?
For if a DX lens mounted on a DX camera provides enough off-axis response to make the edgemost sensor on a D300 work than a FX lens mounted on a FX camera should be able to do the same, no? The image circle is scaled as well as the sensor size.
