> Anyone got any theories on how F and later series lenses are powered?

What are you talking about?  The only lenses I can think of that would need 
any power are the Power Zoom and (future) supersonic focusing lenses, both 
of which have those two special contacts just inside the lens mount for 
providing power from the camera body.  Otherwise, all other lenses are 
driven by the camera's AF motor.  Is there something else that would need 
power?

John

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http://www.cafepress.com/neovenatorphoto 



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