Jan van Wijk wrote:
>
> However, one thing puzles me a bit, there is a tiny ring just behind the
>distance-scale
> with a litle knob on it that you can use to lock the focus. What I don't quite
>understand
> is why it is possible to rotate this ring. Any hidden features or what ??
Yes. That's not a focus lock - it's a quick-focus preset. Even with
the knob tightened, it's possible to change the focussing of the lens
(Try it!). This ring just gives you a pre-focussed setting you can
come back to instantly - it provides an adjustable spring-loaded detent.
So you pre-focus on where you expect your subject to be, and tighten
the knob. If you then have to suddenly re-focus on some other subject
it's really easy to reset the lens to your original focus setting.
--
John Francis [EMAIL PROTECTED] Silicon Graphics, Inc.
(650)933-8295 2011 N. Shoreline Blvd. MS 43U-991
(650)932-0828 (Fax) Mountain View, CA 94043-1389
Hello. My name is Darth Vader. I am your father. Prepare to die.
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