Did you try cleaning the contacts? There isn't an communication between the lens and the camera for an A lens. It just reads the contacts and determines aperture range. Try cleaning them.
On Mon, Jul 15, 2013 at 12:59 PM, John <[email protected]> wrote: > I finally dredge up enough motivation to actually go out and do some > photography. Got on site & my favorite lens takes a crap on me. > > My workhorse has been a Tokina ATX-Pro 287 28-70mmf/2.8. I got two frames & > camera won't fire the shutter. Aperture shows "F--". I do everything I can > to make sure the lens is properly seated & that the aperture ring is latched > into the 'A' position ... NO JOY! Nothing I can do will make it show the > aperture. > > I have one other 'A' lens (SMC Pentax-A Macro 1:2.8 100mm) in my bag on > site, & when I switch to it the aperture works fine. I also try both lenses > on my K10D (backup) and get the same results; Tokina "F--" & Pentax shows > the aperture selected with the thumb-wheel. > > I'm back home & I've got a couple of other Pentax auto-focus 'A' lenses to > test with. They all show the aperture & change with the thumb-wheel. And > just to add insult to injury, I give the Tokina one last try & now it's > showing the aperture again. > > Meanwhile, every bit of motivation has drained away! > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
