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Originally Posted by tashley
But that PDF is their pre-sales bumpf! It makes no inference that things might be different on the M8 than on a film M, though we all know this to be true. And in any event if the DOF moves both forwards and back as aperture tightens then there's no way that on any M it should randomly move only forwards. There's more to this than meets the eye. Trust me. And I'm not even a doctor.
t
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Trust me (even though I have a red AGA). The depth of field isn't moving back very much in those figures - you don't have to reduce the acceptable dof much as a percentage for it to move forwards instead.
If you do a calculation at each aperture for each distance, you will find the middle of the dof range moving away.