Nikon Z-mount
Nikon Z-mount (stylised as formula_1) is an interchangeable lens mount developed by Nikon for its mirrorless digital cameras. In late 2018, Nikon released two cameras that use this mount, the full-frame Nikon Z 7 and Nikon Z 6. In late 2019 Nikon announced their first Z-mount camera with an APS-C sensor, the Nikon Z 50. In July 2020 the entry level full-frame Z 5 was introduced. In October 2020, Nikon announced the Nikon Z 6II and Nikon Z 7II, which succeed the Z 6 and Z 7, respectively. The APS-C lineup  was expanded in July of 2021, with the introduction of the retro styled Nikon Z fc, and in October 2021, Nikon unveiled the Nikon Z 9, which effectively succeeds the brand's flagship D6 DSLR. Nikon SLR cameras, both film and digital, have used the Nikon F-mount with its 44 mm diameter since 1959. The Z-mount has a 55 mm diameter. The FTZ lens adapter allows many F-mount lenses to be used on Z-mount cameras. The FTZ allows AF-S, AF-P and AF-I lenses to autofocus on Z-mount cameras. The older screw-drive  AF and AF-D lenses will not autofocus with the FTZ adapter, but they do retain metering and Exif data. Z-mount cameras support metering as well as in-body image stabilization (IBIS) with manual focus lenses. The 55 mm throat diameter of the Nikon Z-mount makes it the largest full-frame lens mount. It is much larger than the F-mount, the Sony E-mount used by Sony mirrorless cameras but only slightly larger than the 54 mm of both the Canon EF and Canon RF mounts. It is also slightly larger than the 51.6 mm diameter full -frame mirrorless Leica L-Mount. The Z-mount has also a very short flange distance of 16 mm, which is shorter than all mentioned lens mounts. The introduction of the Z-mount also saw the re-introduction of the Noct brand, used to describe the 58 mm S Noct lens with an ultra-fast maximum aperture. Nikon published a roadmap outlining which lenses are forthcoming when the Z-mount system was initially announced. The roadmap has been updated multiple times. As of October 2021 the current version of the roadmap indicates eight lenses to be released until 2023. Z-mount  lenses. Nikon uses these designations in their Z-mount lens names: Teleconverters. The Nikon teleconverters are only compatible with the Nikon 70-200/2.8 VR S and the Nikon 100-400/4.5-5.6 VR S. They cannot be used in conjunction with the FTZ adapter. Z-mount teleconverters cannot be mounted on top of each other. Mount adapters. Nikon specifies lens compatibility as in the following table. F-mount teleconverters can be used on compatible lenses, but the Z-mount teleconverters may not be used in conjunction with the FTZ. For details on the lens types, refer to Nikon F -mount. Third-party lenses and adapters. Numerous manufacturers offer purely manual lenses and lens mount adapters for the Z-mount. These do not interface electronically to the camera and do not support autofocus or automatic control of the aperture. Some manufacturers offer lenses and adapters with full electronic functionality (autofocus, automatic aperture control, Exif metadata etc.). Third-party lenses and adapters often rely on reverse engineering the electronic protocol of a lens mount and might not work properly on new cameras or firmware versions.