When I 1st study that sentence a few many years in the past, I understood there was a dilemma. In response to the impending use of heavier varifocal or zoom lenses and the even larger synchronous electrical motors hooked up to the human body Paillard gave it a significant rectangular base, with 3 tapped bushings replacing the original single-faucet "button" base in 1963 and quickly afterward a protruding 1-to-1 shaft for the ESM motor.