Pentax 645N - Focus Lock and Manual Focusing

FOCUS LOCK FUNCTION
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In the Spot Metering Mode, the camera focuses with the
spot metering / focusing area of the viewfinder. If you
shoot without positioning the spot metering / focusing area
‘on the main subject, the main subject will not be focused
properly.
Set the AF frame selector to [ [*] ].
1. When the composition does not allow the autofo-
cus frame to be placed over the most important
subject, the camera will focus on the background
as shown in the illustration.
* The focus lock can be used in the 3-point AF Mode and
Spot AF Mode.
* The focus lock does not operate when the AF mode
selector is at [ SERVO ].
2. To prevent this, focus on the main subject with the
spot metering / focusing area. Depress and hold the
shutter release button halfway down. The in-focus
indicator remains on, indicating that the focus is
temporarily locked.
3. While holding the shutter release button halfway
down, re-aim the camera or recompose the picture,
then depress the shutter release button fully to
release the shutter.
* Lifting your finger off the shutter release button clears
the in-focus indicator [ O ] in the viewfinder and cancels
the focus lock function.
* To refocus on another subject, lift your finger off the shut-
ter release button.
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