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AF Technology

The AF system incorporates a number of new technologies. These include Zone and Wide/Tracking modes with enhanced tracking performance on moving subjects, as well as innovative technologies such as Eye Detection AF for accurate portrait and Auto Macro that eliminates the need to manually switch to the Macro mode. The algorithm has also been optimized to improve AF in a number of areas including improved precision in Single Point AF and enhanced performance during movie shooting.

Fast and accurate Predictive Tracking AF
(in AF-C mode)

The advanced Predictive Tracking AF technology, which uses data from the subject to predict its next move, enables highly precise AF-C shooting. Once captured in the AF frame, the camera continues to track the subject even if it makes unpredictable movements up/down, right/left or closer/further, which the conventional AF system had difficulty tracking.

Three parameters controlling AF-C

Fujifilm has substantially improved the AF-C algorithm to boost the accuracy of the FUJIFILM X-T2's ability to track moving subjects. You can now fine tune how the camera reacts to the way the subject moves within the frame, how fast the subject moves and where in the frame the camera prioritizes focus. The five presets in the AF-C Custom Settings represent combinations of these three factors.

  • Tracking Sensitivity

    Tracking Sensitivity

    This setting allows you to specify whether the camera should switch its focus to a different subject or retain its focus to wait for the subject to reappear. This control is useful when the object you are tracking disappears behind an obstacle, goes out of the frame or when a second object at a substantially different distance from the subject comes into the frame, Selecting 0 makes the camera switch its focus immediately, while choosing 1-4 progressively lengthens the time it will retain focus.

  • Speed Tracking Sensitivity

    Speed Tracking Sensitivity

    This setting defines the camera's tracking characteristics based on changes to the subject's speed. Selecting 0 (constant speed), the camera does not consider change of speed when predicting subject movements. Choose 2 (variable speed) and the camera takes speed changes into account when predicting subject movement, making it suitable for accelerating or decelerating subjects.

  • Zone area Switching

    Zone area Switching

    This setting is available only in the Zone AF mode, and allows you to specify which part of the selected focusing zone should be given focusing priority. Select CENTER to maintain focus in the center of the frame, or FRONT to switch the focus to a subject at the front of frame when the original subject moves out of shot. AUTO tracks the subject you first focused on.

*X-T2 only.

Highly precise Intelligent Hybrid AF

Intelligent Hybrid AF combines on-sensor phase detection AF with contrast AF. On-sensor phase detection AF uses phase detection pixels on the image sensor for fast and precise focus even in low light conditions or on low contrast subjects. Contrast AF is effective in even darker conditions, delivering precise focus on all types of scenes.

Accurate Single Point AF

The Single Point AF area is divided into smaller sections to accurately determine the distance to the subject for even greater focusing precision. When the selected section contains both subject and background, the AF system focuses on the subject nearer the camera, to prevent accidentally focusing on the background.

High-speed AF from macro to infinity

The new AF system features an Auto Macro function that eliminates the need to press the Macro button before shooting close-ups. The Auto Macro function delivers optimized AF speed across the range to increase the focusing speed from macro to infinity by approx. 10%.

Fast and smooth AF during movie shooting

Intelligent Hybrid AF is even used during movie shooting, switching between the phase detection AF and contrast AF at the center of the screen. The algorithm has been optimized for fast, precise and smooth focusing. When the Face Detection function is activated, the system automatically maintains focus on people during movie shooting.

Fast linear motor-driven AF

Lenses (typically zooms) with an inner focusing mechanism are driven by a linear motor. It drives lens elements in the non-contact state to deliver silent and highly responsive AF. Lenses featuring a linear motor swiftly respond to the new AF system's high-speed focusing, further helping to track a moving subject.