I have a problem with an Adaptall mount on a Canon FTB body. I just received this combo thru auction and the lens doesn't stop down. I got the lens off the mount and took a look at things and I think the mount is wrong for the lens. It's an Adaptall 2 and the lens is an AE Tamron 24mm F2.5. As far as I can see, the actuator in the mount will lineup with the aperture actuator linkage in the lens when you line up the dots and push the lens into the mount in preparation for locking it on, but when you turn the lens to lock it in, the lineup disappears so there's no stop down. On top of it I checked the lever in the cameras body which is suppose to push on the Adaptall's lever which in turn pushes the aperture linkage and there is no camera body lever movement at all. Is the mount correct, lens wrong? I think the body lever is broken because the lens/mount lineup is wrong.