Good point about the aperture rings on Nikon G lenses. You have to set the aperture on the body for those. What does that mean for F4/5/6 where you CAN set the aperture on the body...in fact you have to set the lens to F22 in order to use the auto modes. Does this mean the "G" lenses will work on AF film bodies, so long as you don't try to use Manual modes?
Of course most macro rings/bellows don't couple the aperture, so with those you truly are stuck at minimum aperture with G lenses.