Fujifilm has released a firmware update (V4.0) for its video DSLM APS-C camera 
X-T3 announced which, among other things, will more than double the speed of the autofocus (from 0.06s to 0.02s), bringing it closer to the performance level of X-T4. The update is to appear on 28 October and is to optimize apart from the improvement of the autofocus also still the detection of the movement of objects and to lead so to a hit rate of over 90%.
Fujifilm X-T3
Other enhancements include the ability to use the autofocus in low-light situations (-7EV) in combination with the new Fujinon XF 50mm F1.0 R WR lens; a new "Focus Limiter" that allows you to predefine an area of focus; the ability to resize Single AF points during video recording; and the ability for third-party programs to read the ratings of images in the camera. The ratings of images shot in Jpeg and RAW mode are applied to both Jpeg and RAW files.
The performance of Face Tracking / Eye AF has also been improved. The algorithm has been reprogrammed to double the tracking performance of Eye AF in continuous mode. The camera can focus on the face or eyes faster and more precisely, even in portrait shots that involve some movement.
Fujifilm X-T4
Here our test of the image quality of the Fujifilm X-T3 and our practical test of the X-T4 regarding its video stabilization, autofocus, ergonomics.
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