You shouldn't have to set a menu item. And if it's set on autofocus, it shouldn't fire until something is in focus. You would want to use selective focus. If it's on multipoint, it will find something in focus other than the subject.
Paul
On Apr 11, 2006, at 9:53 PM, Shel Belinkoff wrote:

OK, that's what I thought, but the camera fires even when there's nothing
in focus.  Is there a menu item that has to be set?

Shel



[Original Message]
From: Godfrey DiGiorgi

On Apr 11, 2006, at 6:15 PM, Shel Belinkoff wrote:

I seem to have forgotten how trap focus works on the istDS.
Can  someone refresh my memory?

With a manual focus lens, set a focus distance and flip the AF/MF
switch to AF. Hold the shutter release button fully depressed. When
the AF sensors pick up a subject in focus, the focus indication light
will turn green and the shutter will trip.



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