Page 27 - D850_broschuere

| LANDSCAPE | LANDSCAPE

Powerful AF in the dark and more compositional freedom — 153-point AF system and AF down to -4 EV Simplified adjustment for more accurate focus — Auto AF fine-tune for viewfinder shooting

The D850’s powerful 153-point AF system — the same acclaimed technology used in the Accurate AF is crucial to take full advantage of the D850’s high pixel count. To ensure focusing accuracy, the D850’s auto AF fine-tune
flagship D5 — delivers over 130% of the D810’s frame coverage, with 99 cross sensors makes subtle adjustments for each type of lens you use. The simplified process involves achieving focus in live view and letting the camera
offering powerful detection. Thanks to a Multi-CAM 20K autofocus sensor module, automatically acquire, then store, the AF tuning value.
developed to keep noise to an absolute minimum, the central point functions at -4 EV* and
other focus points at -3 EV*. Accurate AF is possible in challenging low-light or low-contrast
situations — a great asset for landscape photographers shooting in the hours when light is Auto AF fine-tune steps
scarce, such as at sunrise and sunset, and especially useful for capturing nighttime scenes.
* At ISO 100 and 20°C/68°F.

Focus points (153): / / /
Selectable points (55): /
Cross sensors (99): /

Achieve focus at a focus distance you use Select “Yes” to save the tuning value. The camera automatically stores the result to
frequently in live view. Press and hold the AF-mode “Saved value” list.
and movie-record buttons simultaneously until the
next dialogue appears. Note: AF fine-tune must be turned on in the setup menu to enable the tuning value to be used for shooting.

Auto AF fine-tune system

1: Focus achieved in live view. Pentaprism
Mirror

Live view CMOS sensor
AF sensor

2: Difference of defocus amount (A) between contrast-detect AF (live view) Pentaprism
and phase-detection AF (viewfinder photography) is calculated.
Mirror
Viewfinder photography CMOS sensor
AF sensor

3: (A) is recorded as the AF tuning value and applied to viewfinder photography. A

© Luke Austin

[ 26 ] [ 27 ]