The firmware update Ver.4.00 from Ver.3.30 incorporates the following issues:
The update will improve the autofocusing performance of the X-T3 to the same l
evel as the “FUJIFILM X-T4”(X-T4).
1) The fastest AF speed has been improved from 0.06 seconds to 0.02 seconds, e
quivalent to the performance of the X-T4.
2) The algorithm for predicting subject movements has been updated.
3) AF tracking performance has been doubled*. Press the shutter button halfway
down when a subject is in the focus area to maintain focus on the subject wit
h a higher level of accuracy.
4) The Face Tracking / Eye AF performance has been upgraded. The algorithm has
been re-written to double* the tracking performance of the Eye AF in continuo
us shooting modes.
5) The update allows the camera AF to work in low light levels down to -7EV**,
facilitating fast and highly-accurate phase detection AF even in near darknes
s.
6) The new firmware adds the “Focus Limiter” function which gives a pre-defi
ne specific focus range.
* When compared with the Firmware Ver.3.30.
** When using the FUJINON Lens XF50mmF1.0 R WR.
Other improvements.
1) The size of the Single AF point can be adjusted during video recording.
2) Photo ratings can be read by third-party software, allowing users to find t
heir favorite pictures quickly.
3) The focus point can be changed by the focus lever during AE lock.
4) The default setting of the AF-S PRIORITY SELECTION in the RELEASE/FOCUS PRI
ORITY of the SHOOTING menu is changed to FOCUS from RELEASE.
Fix of minor bugs.