The previously rumored Nikon Z9 firmware update 2.1 is now officially released

The previously rumored Nikon Z9 firmware update version 2.1 is now officially released – here are the details:

• [High-frequency flicker reduction] has been added to the roles that can be assigned to camera controls using Custom Setting f2 [Custom controls (shooting)]. For more information, see the Supplementary Firmware Update Manual.
• Autofocus is now better at tracking small subjects.
• Autofocus now produces more accurate results with human portrait subjects detected via eye/face-detection AF with [Continuous AF] selected for [Focus mode].
• Fixed an issue that resulted in the camera focusing on the background when [Single-point AF], [Dynamic-area AF (S)], or [Dynamic-area AF (M)] was selected for [AF-area mode], or when [Wide-area AF (C1)] or [Wide-area AF (C2)] was selected with a custom focus-area size of [1×1].
• You can now expect better results from vibration reduction during panning shots taken with the camera pointing up or down and an option other than [Off] selected for [Vibration reduction].
• Fixed the following issues:
  • With certain Z mount lenses, choosing [Focus] for Custom Setting a1 [AF-C priority selection] with [Continuous AF] selected for [Focus mode] would sometimes disable the shutter release even when the subject was in focus.
  • [Aperture lock] could not be selected for Custom Setting f4 [Control lock] in modes M and A when an F mount lens was attached.
  • Assigning [Recall shooting functions] to a control using Custom Setting f2 [Custom controls (shooting)] would render [Save current settings] unavailable when an F mount lens equipped with an aperture ring and power contacts was attached.
  • Auto distortion control would sometimes not be applied to pictures taken with [ON] selected for [Auto distortion control] in the [PHOTO SHOOTING MENU].
  • The camera would not recognize custom Picture Controls saved to a memory card using the Mac edition of Picture Control Utility 2.
  • Recalling shooting functions would sometimes result in unexpected changes to exposure if:
    • ISO sensitivity was set to a fixed value in mode M,
    • an option other than [Exposure maintenance off] was selected for Custom Setting b7 [Keep exp. when f/ changes], and
    • [Recall shooting functions] or [Recall shooting functions (hold)] was assigned to a control using Custom Setting f2 [Custom controls (shooting)] both with no option (or mode M only) selected for [Shooting mode] and with no check next to any of [Shutter speed], [Aperture], and [ISO sensitivity settings].
  • When [Recall shooting functions] or [Recall shooting functions (hold)] was assigned to a control using Custom Setting f2 [Custom controls (shooting)], subject detection would not function as expected if the setting for [AF subject detection options] recalled by pressing the control differed from the option currently selected for [AF subject detection options] in the [PHOTO SHOOTING MENU].

Full press release:

NIKON RELEASES FIRMWARE VERSION 2.10 FOR THE NIKON Z 9 FULL-FRAME MIRRORLESS CAMERA