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: [email protected]
To: [email protected]
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
