Nikon Zf 3.01 & Z9 5.32: Bug Fix Firmware Drops

Minor bug fixes for Zf and Z9 — nothing that unlocks new features, but the Z9's FTP freeze during playback is the kind of silent workflow killer that strikes at the worst moment, so if you're uploading on location, install it. Also: Viltrox is flagging a reminder not to flash firmware with third-party glass attached, which is worth knowing before you hit update.