inch. The 13mm maximum size circle, at .51 inches, is about
1/2 inch wide.
Primarily, just remember that the center area of the
Viewfinder provides the most important metering area and
you’ll do fine. For information on fine-tuning
Center-weighted metering, refer to the section called Fine
Tune Optimal Exposure in the chapter titled Chapter 4.
What about the Averaging Meter?
If you set your meter to Avg in Custom setting b5 (full
averaging), the light values of the entire Viewfinder are
averaged to arrive at an exposure value. No particular area of
the frame is assigned any greater importance (see Figure 9-4,
image 5).
This is a little bit like Matrix metering, but without the extra
smarts. In fact, on several test subjects, I got remarkably
similar meter readings from Avg and Matrix. Matrix should
do better in difficult lighting situations since it has a database
of image characteristics to compare with your current image
and it looks at color, distance, and where your subject is
located in the frame.
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