I continued to use the camera with other lenses for several hours after the 16-45 stopped working, so I'm pretty sure the camera did not have any problems. Light conditions were continuously bright and high-contrast. I also used the 16-45 on manual focus a couple of times, since it was the only wide-angle in my bag that day, and the ring required a lot more force to turn. I also checked the lens after re-acclimatising to room temperature, and it then performed normally.
Touch wood; my *istD has performed flawlessly all the time since I bought it in late October 2003. But I'm not impressed with the clutch-focus mechanism in the 16-45. Jostein Quoting Tom C <[EMAIL PROTECTED]>: > Are your sure it was too tight/cold to be driven? How did it feel by hand? > > I've had my *ist D out skiing and all of the sudden it would not auto-focus > anymore. This was with the FA 31/1.8. It would occasionaly hunt, but most > time it would appear to not even attempt to AF. I switched lenses and it > appeared to be OK, but 15 minutes later I had the same problem. > > It turned out that, again, the AF point selector switch had been > accidentally bumped to allow the camera to choose the AF point, not the > center point. So the camera was continually attempting to focus using a > very low contrast area of the frame (white sky). > > > Tom C. > > > > > > > >From: "Rob Studdert" <[EMAIL PROTECTED]> > >Reply-To: pentax-discuss@pdml.net > >To: pentax-discuss@pdml.net > >Subject: Re: Cold weather performance of DA 16-45/4 > >Date: Tue, 21 Mar 2006 09:50:21 +1000 > > > >On 20 Mar 2006 at 20:53, Jostein wrote: > > > > > Gang, > > > > > > Just an observation from prolonged camera exposure to temperatures > > > around -15°C, in windy conditions. The clutch focus mechanism becomes > > > too tight, so that the AF motor in the *istD hardly manage to drive > > > it. Just to check that it was not the batteries acting up, I changed > > > to FA*400/5.6 and Sigma EX 70-200/2.8. The AF responded swiftly and > > > without problems with both lenses. Considering that I've never had to > > > touch up the focus manually while working with AF, the clutch-focus > > > mechanism is suddenly a feature I wish I didn't have. > > > >Very interesting, not that I expect that I'll ever have to endure such lack > > >of > >heat :-) > > > > > >Rob Studdert > >HURSTVILLE AUSTRALIA > >Tel +61-2-9554-4110 > >UTC(GMT) +10 Hours > >[EMAIL PROTECTED] > >http://members.ozemail.com.au/~distudio/publications/ > >Pentax user since 1986, PDMLer since 1998 > > > > > > > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
