Yes Mark, you're right. However, the question was more general: is there any "no, don't do that, because..." about that combo? Dario
----- Original Message ----- From: "Mark Roberts" <[EMAIL PROTECTED]> To: "Pentax-Discuss Mail List" <[email protected]> Sent: Monday, May 05, 2008 5:41 PM Subject: Re: AF lenses on 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? > > That couldn't happen because the 1.7xAF converter doesn't have to > electrical contacts necessary for SDM focusing. > > -- > 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. -- 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.

