D4S Primary Features
1.Advanced AF performance that responds to the strict demands of professional photographers
• High-performance AF that more accurately acquires and tracks the intended subject, even under extreme conditions
Reflection of ideas from professional photographers and repeated simulation of various advanced techniques they often use has resulted in the very precise subject acquisition and tracking performance that these photographers require, and upon which they can rely, under the most extreme conditions. Very precise adjustment of AF algorithms based on the Advanced Multi-CAM 3500FX autofocus sensor module enables certain acquisition of even erratically moving subjects and those exhibiting little in the way of contrast. The D4S’ improved autofocus keeps the acquired subject in focus, even when it is coming closer, or moving away, at high speed. What's more, the D4S offers better balanced AF control with more precise focusing on the intended subject, and more accurate tracking of that subject, even when photographing team sports, such as soccer and rugby, when action may temporarily obstruct the intended subject.
• 5 AF-area modes for flexible focusing
In addition to the four time-tested modes built into the D4—Single-point AF, Dynamic-area AF (9-, 21-, 51-point), 3D-tracking, Auto-area AF—the D4S is equipped with a new Group-area AF AF-area mode for more powerful and versatile autofocusing. When Group-area AF is selected, the camera uses one focus point selected by the user and one each above, below, to the right, and to the left of the selected focus point, for a total of five focus points, for focusing. By capturing the subject within the five-point group, even if it is small and moving quickly and erratically as is often the case when photographing athletes and animals, the intended scene can be captured with greater certainty without focus shifting to the background.
In addition, an AF-area mode can be assigned to the AF activation button on super-telephoto NIKKOR lenses. When this is done, the specified AF-area mode is enabled while the AF activation button is held down. This enables strategic switching between the AF-area mode selected with the camera and a different AF-area mode assigned to the AF activation button, allowing users to switch back and forth between vital modes instantly, without ever taking their eye off the subject, when photographing a variety of scenes that change drastically. This allows users to better maximize AF performance between bursts of high-speed continuous shooting at approximately 11 fps1 with AF and AE tracking.
1 Measured according to CIPA guidelines. Value with shooting in AF-C autofocus mode, [S] or [M] exposure mode, shutter speed of 1/250 s or faster, all other settings at their default values.