I usually use just one focus point, and usually it is the central one.
The EXIF doesn't record this... not even whether AF or manual focus
was used.

I've done a bunch of tests using focus targets like road signs. They
are contrasty and flat and should serve this purpose well.

Oddly enough, all looks normal in the viewfinder, and I get focus
confirmation on that central point. But when I examine the results
later, the focus is off.

KS


On Thu, 6 Sep 2007 18:49:59 +0100, "Gino" wrote:

In the Canon software that came with the camera, does it show the focus
point that was used for the focus (obviously this will be a bit irrelevant
if you focused and then recomposed before taking the shot)?

What focus point settings are selected in camera? All focus points or just
one?


"King Sardon" wrote in message
.. .
My 17-55mm f2.8 IS lens was not autofocusing well with my Rebel XT
body. Often the focus would end up being way in front of what I
thought I was focusing on... I mean WAY in front, by maybe 50 ft...
although it varied.

My other lenses autofocus well and dependably with the Rebel, but not
the 17-55mm f2.8 IS.

I sent the lens in to Canon for them to fix the autofocus under
warranty. But they returned the lens saying that it was working fine.

So I tried the lens out on a friend's 20D, and sure enough, the lens
works fine with the 20D... but not with my Rebel XT. The lens is still
in its warranty period, but the Rebel is not. Not sure what to do now.
Does anyone else have this problem with the 17-55mm f2.8 IS lens on
the Rebel? I'm wondering if it is a design fault or a sample issue.

KS