Haven't tried, but see Rob Studdert's comments a bit earlier today. You need something to short the contacts on the AF adapter to lens mating surface. I believed somebody used a chewing gum wrapper for this or scraped the screwmount lens down to bare metal at the contact point. Regards, Bob S.
[EMAIL PROTECTED] writes: > > No joke, no magic, but you will need that screwmount to K mount adapter on > > the front of the Pentax 1.7x AF Adapter. It works by moving a small lens in > > the 1.7x adapter. Put your screwmount lens on the front of the adapter. > > Focus it to somewhere near in-focus. The AF camera motor will spin, moving > > the little lens back and/or forth and bring the image into focus. You get AF > > with a screwmount lens... only with your Pentax can you get 40 year old > > lenses to autofocus! > > > > Regards, Bob S. > > > Are you sure, have you tried ?? > Extract from owner manual: > .... "Compatible lenses ... KA mount ... K mount" .... "Even if the > Mount-Adapter K mounted Takumar screw-mount lens is > combined with this > Adapter, the lens does not provide autofocus function" ....
