Had this exact issue last month (though I'm not sure about the lack of preview function... must be *ist D specific).
Then I figured out that when slightly pushing the ring, still in A position, in the opposite direction from the manual settings (as if I wanted to go "after A"), the normal operation was temporarily resumed. It stopped working when I released the ring so it could only work with the hand on the ring. Eventually, I unscrewed the mount, and had to clean a conductive pad, where a brush attached to the ring comes to rest when the ring is set to the A position. This pad was dirty at the exact position where the brush would come when set to A, and pushing the ring even a slight bit would establish the connection again. Since cleaning, it just worked fine again, hopefully good for a few more years! I'm generally poorly gifted regarding precision handwork, so almost anybody who knows how to operate a precision screwdriver should be able to do this simple operation. The only delicate phase is putting the whole thing together again. The aperture mechanical bracket is almost guaranteed to move away during dismantling, and must be carefully put back in place afterwards (otherwise, the aperture lever will be stuck or loose, and you'll know immediately anyway. Nothing should break apart if you're careful and check manually before you mount it on a body). The small ball-shaped connectors are also a bit annoying, as they are mounted on springs. But again, if I managed to do so with a bit of patience and a clean working desk, many people can do so. Good luck, this lens deserves it. Patrice Larry Levy a écrit : > I felt that I needed a little greater reach on my *ist D, so I found and > bought an FA 80-320. The lens looks great, mounts well and has a major > problem. The D does not recognize or change the settings on the lens. > Additionally, when I use the preview switch, the lens does not stop down. > > On my Z-1, the camera does not set the lens in P mode, manual settings seem > to work and preview stops down. > > Off camera, moving the lens lever controls the diaphragm. > > > Is there a reasonable fix for this? I do like the reach and would not like > to have to return it. > > Help > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
