The camera’s autofocus is impressive overall in 4k, with noticeably improved human subject tracking over its predecessor. Though focus transitions can be a tad slow, it has little issue keeping moving human subjects in focus. The object tracking, however, isn’t quite as effective, being somewhat slow to adjust focus once the object has moved. It’s not bad by any means, but it simply isn’t as seamless as the best AF systems. The implementation also leaves a little to be desired. It’s fine if you want to track one of the subjects included in one of its subject detection options, like a human or automobile, but human face/eye detection are in a separate menu. Meanwhile, if you’re tracking a general subject that does fall in the list of subject detection modes, you have to use the ‘Wide/Tracking’ area mode, which will only track the subject as long as they stay within the frame or focus area. Otherwise, you’ll have to use the ‘Multi’ AF mode. That said, one notable improvement over the Fujifilm X100V is that you can now simply tap a subject on the screen to start tracking, making autofocus in video a bit more intuitive.

Note: We achieved the above results using the ‘4k HQ’ setting. The camera performed better overall in our subject tracking test in 4k HQ and in 6.2k (which you can see here for face tracking and here for object tracking) than it did using regular 4k, most likely due to the 1.23x crop, which provides a closer crop on the subject.