This first section is about how to configure the autofocus
system in various ways. The whole process is rather complex,
and important for good photography. I thought autofocus and
related functions important enough that I’ve included an
entire chapter in this book titled Chapter 11. It covers
autofocus and related functions in much deeper detail. Please
be sure to read that chapter well.
AF-C Priority Selection
Custom setting a1 (D300S and D300)
(User’s Manual – D300S page 263; D300 page 267)
AF-C priority selection is designed to let you choose how
your autofocus works when using Continuous-servo
autofocus mode (AF-C).
If you configure this setting incorrectly for your style of
shooting, it’s entirely possible that a number of your pictures
will be out of focus. Why?
Well, if you’ll notice in Figure 4-5, image 3, there are three
specific selections:
▪ Release – If the image must be taken no matter what,
then you will need to set AF-C priority selection to
Release. This allows the shutter to fire every time you
press the Shutter-release button, even if the image is not
in focus. Releasing the shutter has “priority” over
autofocus.
If you are well aware of the consequences of shooting
without a focus guarantee, then use this setting to make
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