Viewers: Please see post farther down the thread - many questions answered and a solution proposed
!! --
update - solution worked.
I just received a Tamron SP 90mm f/2.5 52B portrait/macro lens (with the converter) and with a P/KA Adaptall-2 mount from a reputable Forum member.
The Tamron lens will not indicate the aperture on my K10D in AE mode. The lens appears to function as an M lens - full manual, open aperture shutter release, no communication with the camera body but later I show that it actually is responding to CAMERA inputs, but the camera does not display the Av setting.
My Pentax and Vivitar A lenses communicate and display the aperture setting and the e-dials work.
The aperture ring on the Adaptall-2 mount is set to AE -f/32 (the AE setting for cameras that do not support f/32).
I have tried the camera in all modes, unmounted and remounted the adapter, mounted A, FA and DA lenses (they communicate fine) cleaned the adapter contacts with a non-active cleaner, nothing.
The seller assures me the lens worked just last weekend (he tested it before sending) with P3n and P30T bodies.
The seller is beyond trustworthy, so I must be doing something wrong.
Please offer suggestions and assistance.
Last edited by monochrome; 02-24-2009 at 05:09 PM.