The AF 1.7x doesn't support pass through digital information for any AF lens, nor would it supply power for the SDM motor so the answer is no the lens and the adapter won't both try to autofocus. The camera will think and treat the SDM lens for all intents and purposes as an A lens if it's mounted with an AF 1.7x adapter.
Dario Bonazza wrote: > Hi all, > > I've been asked this question, but couldn't answer it. What happens by > matching a DA* 300mm AF lens (or any other SDM lens) with the AF 1.7X > converter? Do both AF devices (the SDM one in the lens and the screwdriver > type in the adapter) start & try to autofocus? > > Thanks. > > Dario > > > -- Vote for Cthulhu. Why settle for a lesser evil... -- Dr. Jerry Pournelle -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
