In article <32C89788.5B06@epix.net>, ferrario@epix.net says...
>Owen P. Evans wrote:

>> This is a good question. The MD-12 is a beefed up version of the MD-11 {
>> strengthened hand grip}. The MD-12 also has a microswitch which shuts off
>> the camera's meter after 16 seconds.

>The MD-12's batteries will power the metering system of
>the camera body - the MD-11 lacks the contacts to transfer
>the power to the camera body. Note this power transfer
>even works with the original FM bodies. The FM+MD-12
>combo will meter even with dead batteries in the camera
>body.

Hmmm, that's a new one to me...;-)
I think the only Nikon motors that also power the camera
are the MD-15 for the FA, and the MD-4 for the F3.......
Hope This Helps