I recently purchased a Nikon FE. I chose the FE because of the large resource of lenses available, the non-AI, AI, and AIS. I have read that when using a non-AI lens the FE uses stop-down metering. I understand this to mean that once I set my aperture it is that light coming through the lens that is read. Is this correct, and is there a difference on how the FE would meter light using an AI lens or does it use stop-down metering regardless of the type of lens used?