You don't say if you are using the F, FA, DA or DA WR version. My FA100 will sometimes refuse to get a focus lock and sit at infinity. I press in the mount lock button to release the AF drive and manually focus to approximate focus and it then seems to work ok till the next time it decides it can't focus on what I'm asking it to look at and I do the same thing. It's done it on all the digital cameras I've owned *istD, K10, K7 and K5. I can't remember it doing it on the MZ-S, but that doesn't mean it didn't.
I don't know if this helps you or not. I don't use it much now days and usually only on manual focus as I have the DA WR version for field work (smaller and weather resistant is good when knee deep in sea water). Leon > On Apr 27, 2012, at 4:13 PM, Tom C wrote: > >> I've started having problems with this lens that are weird. I don't >> think it's operator error... >> >> It didn't want to AF last time I had it on (was using more as a >> telephoto). I just mounted it again, and had the same issue. It seems >> to hunt a bit but does not achieve focus and stops. >> >> It was on the 'A' setting and the view through the viewfinder was very >> dark. I turned the aperture ring to 2.8 and voila it focuses. I then >> returned it to 'A' and it focuses with no problem, as it always has, >> regardless of what I set aperture to via the body. >> >> However, if I take the lens off the camera, and put it back on, it's >> behavior goes to as stated earlier, it doesn't want to focus. I've >> repeated this half a dozen time and it's the same each time I try it. >> >> Idea's? >> >> Tom C. -- 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.
