Nikon 900 User Manual download pdf (Page 36)

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Basic Photography: Focus Settings

Focus Lock

If the color LCD monitor is on when the camera is set to

“Autofocus” or “Macro Close-Up,” focus will be continually

adjusted according to the distance to the subject (if the LCD

monitor is off, focus settings will be adjusted only when the

shutter button is pressed half-way). Pressing the shutter-release

button half-way “locks” focus at the current position. Focus will

remain unchanged as long as the shutter button is held in this

position, even if the distance to the subject should change. This

is known as “focus lock” and can be used to manually adjust

focal depth.

For example, in the following composition, the camera is fo-

cused on a distant point (shown by the mark in the view-

finder), with the result that both distant and nearby objects are

in focus.

To create the same composition at a lower focal depth, so that

only objects in the foreground or middle distance are in focus,

focus the camera on a nearby object and then press the shutter

button half-way. Without removing your finger from the shut-

ter button, return the camera to its original position and then

press the shutter button the rest of the way down. Objects at

the original focus distance will remain in focus, but other objects

may not be in focus, depending on the relative distance to the

original focus point.

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Nikon 900 User Manual Page 36