Nikon has made available for free download fimrware updates for its two flagship cameras, the Nikon Z8 and Nikon Z9, both of which also contain interesting bug fixes for video users.
Among other things, the 4.01 update for the Nikon Z9 fixes a bug that can occur when recording 1080p video after the camera's standby time has expired. See also our 
Nikon Z9 field test.
Here are the most important new features of the Z9 updates:
- The camera would in rare circumstances stop responding or fail to record a video correctly if an attempt for video recording took place after the standby timer had expired then reactivated with[Frame size/frame rate] set to 1920 × 1080 in the VIDEO RECORDING MENU.
- The[Choose image area] and[Switch FX/DX] roles assigned to camera controls were disabled when a slow-motion video option was selected.
- The first shot in burst photography would sometimes fail to acquire appropriate white balance when[Auto] or[Natural light auto] was selected for white balance.
- If shooting continued while[ON] was selected for[PHOTO SHOOTING MENU] >[Photo flicker reduction], the photo live view display would be partially disrupted.
With the Nikon Z8 1.01 update, the adjustments around the overheating warnings during video operation might be the most interesting for video users. The timings and the position of the warning on the display have been adjusted. See also our www.slashcam.de/artikel/Test/Nikon-Z8-in-der-Praxis--Die-bessere-Z9-fuer-Video--8K-RAW-50p-Bolide-mit-Feinschliffbedarf.html(Practical test of the Nikon Z8)
- Changed the timing of the high-temperature warnings appearing when the camera's internal temperature increases mainly during video recording.
- Changed the position where the memory card high-temperature warning is displayed in video mode.
- Fixed the following issues:
- The battery would draw down more quickly while the camera was off if[ON] was selected for[Connect to smart device] >[Wi-Fi connection] in the[NETWORK MENU] even if[OFF] was selected for both[Bluetooth connection] and[Upload while off].
- Focus could still be adjusted using the focus ring when[Disable] was selected for a15[Manual focus ring in AF mode] in the[CUSTOM SETTINGS MENU] if an option other than[Non-linear] was chosen for f9[Focus ring rotation range] in the[CUSTOM SETTINGS MENU].
- SB-800 flash units would sometimes stop responding after pictures were taken with the flash disabled.
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