I just got the three lenses back from John White, and he did an awesome job! They look very neat, and all fitted nicely on my D200, so I am sure they will fit on the F100 and N90s. Metering worked, was accurate etc. In my case it was a good decision to get the Ai'd. The lenses were a 105mm f2.8, 80-200 f4.5, and 200mm f4.