On 31.08.2006, at 16:34 , mike wilson wrote: > Not for USM drive directly but power for the USM motor. There > would have to be some sensor/logic coupling, also, to achieve > focus. So I would assume more contacts in the bayonet.
Mike, I think one digital contact in mount as used in F, FA and later lenses would be enough for communication even if they add some commands for steering USM motor. Powerzoom contacts however are indeed neccessary to provide power! Cheers, Sylwek -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
