Pentax 645N - Page 58

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USING THE SPOT AF MODE
2
Select the Spot AF Mode to critically focus on a
specific spot of the subject which is in the spot AF
autofocus frame.
How to focus
1. Set the AF frame selector to [ Π].
2. Focus on the main subject with the Sopt AF
frame [ indicating in green in the illustration].
* When the main subject is off the Spot AF frame,
use the focus-lock technique. See page 55.