Инструкция С Настройками для Canon EOS Rebel T6
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Locking the Flash ExposureN
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If the subject is too far away and beyond the effective range of the flash,
the <D> icon will blink. Move closer to the subject and repeat steps 2 to 4.
the <D> icon will blink. Move closer to the subject and repeat steps 2 to 4.
FE lock is not possible during Live View shooting.