----- Original Message -----
From: "Rob Brigham" <
Subject: RE: MZ-S Odditties
> This inability will vary from camera to camera and perhaps the
Espio is
> pretty poor, but the MZ-S is superlative in this respect. If
the
> olympus is the 'Stylus' or 'MJU II', then that has an F2.8
lens which is
> probably why it didnt need an aid. Many P&S cameras have F4
or F5.6
> lenses, particularly if the have a zoom lens, which will make
it more
> difficult even for the best AF system in the world.
Incidentally, the
> Olympus Stylus cameras are probably the best value for money
cameras in
> the world!
Most (all) point and shoot cameras use active AF technology. It
is good in that it is very quick and sure in many conditions. It
is not so good in that it is range limited to around 5 meters,
after that, everything is at infinity. Rooms full of reflective
objects will also cause active AF to malfunction, as will
shooting over water.
SLR cameras use passive autofocus. Not so great in that they are
limited in to fairly well lit situations with lots of subject
contrast. Better in that they actually work accurately when the
subject is farther than 5 or so meters from the camera.
William Robb
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