The DA* 16-50 and DA* 50-135 autofocus on both my K10D using SDM or my *istD using the old screwdriver method.
-- Best regards, Bruce Monday, June 9, 2008, 12:37:24 PM, you wrote: g> Can someone educate me on the SDM enabled lenses? Am I correct in g> understanding that the AF is engaged only if you use the lens with an g> SDM enabled body? Otherwise the lens if MF only? g> SO is a bad influence/enabler... I'm being "encouraged" to upgrade g> from the istDS to a K200 +/- 50-135 lens, so I'm checking to see what g> ramifications might be. Not that I *need* the 50-135 when I have the g> really nice 16-45 and just got the 50-200 this month. g> Pat, lurker -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.