Shel, I would suspect the change in subject matter. In the second shot, the
person in the background has moved so that his head cuts off a very bright
background, probably quite enough to alter the exposure by one stop. With
such a subject, I would be tending towards centre-weighted metering to avoid
the potential problem.
HTH
As for the focusing, were you using AF-C or AF-S? In the first shot the
focus seems about right, but the second is way off, to such an extent that
to my eye, there is nothing in focus.
John Coyle
Brisbane, Australia
----- Original Message -----
From: "Shel Belinkoff" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, July 20, 2005 1:43 PM
Subject: The Nine Second Difference
http://home.earthlink.net/~my-pics/2up.jpg
Just nine seconds separate these two pics. They are almost identical
shots. Both were made with the istDs, both at a rating of 3200 ISO, both
@
70mm, both at an aperture of 5.6, both using multi-segment metering, both
using auto focus (more on that later!), both on one of the automatic
modes,
yet they are a stop apart, with the top pic made @ 1/30 sec and the bottom
@ 1/15.
What crummy results these are. The pics, imo, should have an identical
exposure. They would were a funky old manual camera body being used. Is
this the kind of erratic results one can expect from high-tech cameras,
or
is there some sort of failure to communicate or understand on my part?
Why
would these pics be so far apart in their results?
Shel
