Trenton Burd wrote:
>
> Hi-
>
> I was at my local camera shop yesterday and I tried out the 100-400mm
> f/4.5-5.6L IS USM, and I've got a question. (that the salesman didn't seem
> to know)
>
> Is there some sort of locking device that will prevent the manual focusing
> ring from also moving the zoom tension ring? Or is it a design flaw? This
> was really annoying. I would tweak the manual focusing ring, and the zoom
> tension ring would move back and fourth right along with it. We even
> tightened down the tension ring as tight as it would go, and sure enough,
> you move the MF ring and the tension ring would loosen up and move with it.
> What am I missing here?
Trenton,
If you do not hold the ribbed rubber ring beside the locking ring, it
will not tighten. Play with it a little and you will figure it out.
BTW, your message was posted six times.
Ray Amos
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