your camera take a picture every time you press the
Shutter-release button. Your camera will shoot at its
maximum frames per second (FPS) rate since it is not
hampered by the time it takes to validate that each
picture is in correct focus.
You’ll need to decide whether taking the image is more
important than it being in focus. We’ll discuss why the
Release and Release + focus functions exist in an
upcoming section titled Using Custom settings a1 and
a2.
▪ Release + focus – This function slows the frame rate for
improved focus when the light is low or the subject has
little contrast with its surroundings, but it still allows the
shutter to fire even if it cannot find a good focus point.
Release still has priority over Focus, but the camera tries
to focus before releasing the shutter.
▪ Focus – This setting is designed to prevent your camera
from taking a picture when the Viewfinder’s green
in-focus indicator is off. In other words, if the picture is
not in focus, the shutter will not release. It does not mean
that the camera will always focus on the correct subject.
It simply means that your camera must focus on
something before it will allow the shutter to release.
Nikon cameras do a very good job with autofocus, so
you can usually depend on the AF module to perform
well. The Focus setting will drastically increase the
chances that your image is in correct focus.
Here are the screens and steps to select a shutter-release
priority when using AF-C mode (see Figure 4-5):
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