The firmware update Ver. 1.10 from Ver. 1.00 incorporates the following issues:

1. Addition of compatibility with „XF18-135mmF3.5-5.6 R LM OIS WR“
   To ensure that autofocus performs as expected, upgrade the firmware for the camera.
2. Improvement of „Exposure compensation/exposure indicator“ in EVF
   Values are added to the scales of the indicator for better visibility.
3. Improvement of Movie-record button operability
   To avoid an accidental movie shooting, the delayed time will become longer between the moment you press the button and a movie shooting starts or ends.
4. The phenomenon is fixed that images are not recorded with the set interval when „INTERVAL“ in „INTERVAL TIMER SHOOTING“ is set to 5 sec or less. In this case, the setting of „IMAGE DISP.“ in „SCREEN SET-UP“ will change to „OFF“ automatically.

Precaution

1. If firmware updating fails, the camera may no longer operate correctly in some cases. Carefully read the notes provided here.
2. Always use the fully-charged battery when updating the firmware as a basic manner. Never turn the camera off or attempt to use any of the camera controls while the firmware is being overwritten.
3. Firmware updating requires approximately 90 seconds.
4. Once the firmware has been updated, some data of the previous version cannot be restored.

Source: www.fujifilm.com

Firmware Update Fuji X-T1 Fujifilm