X-T1 firmware v4.21
Fujifilm · First seen by GearPulse Jul 4, 2026
What's in this update
The firmware update Ver. 4.21 from Ver.4.20 incorporates the following issues: We have found a malfunction in the firmware ver.4.20 launched on December 17 2015. This firmware is a tentative solution and its function is same as the previous version of 4.10. If you have upgraded your camera to ver.4.20, please update it again to ver.4.21 to avoid the malfunction.
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