Fujifilm X-mount

The Fujifilm X-mount is a type of interchangeable lens mount designed by Fujifilm for use in those cameras in their X-series line that have interchangeable-lenses. These lenses are designed for 23.6mm x 15.6mm APS-C sensors.
Various lens manufacturers use this mount, such as Fujifilm's own XF and XC lenses, Carl Zeiss AG (Touit lenses), Samyang Optics, Handevision, SLR Magic, Viltrox and Zhongyi Optics. There also is an adaptor to allow compatibility with Leica M lenses and third-party options have also been announced. Additionally, a host of adapters for a range of SLR lenses are available, allowing the mounting of lenses (without autofocus or auto aperture) from Canon, Nikon, Pentax, Minolta, Contax/Yashica, Konica and more. This mount type should not be confused with the discontinued Fujica X-mount, which is not compatible with the newer X-mount without an adapter.
"By mounting the lens deeper inside the camera, closer to the sensor, resolution is increased across the frame. Information exchange between the body and lens ensure a responsive experience at all times."
Fujifilm X-Mount cameras.
Fujifilm has released the following cameras that use the X-mount:
Fujinon XF and XC lenses.
The following lenses are natively operational on the Fujifilm X-mount cameras. Fujifilm's 'XF' and 'XC' lenses bear Fujifilm's moniker "Fujinon" which is used for optics within the company.
Fast prime lenses.
These lenses are those with maximum apertures of f/2 or larger.
XC zoom and prime lenses.
These are entry level zoom lenses with smaller maximum aperture and plastic bodies.
Short back focusing distance.
By reducing the distance between the rear lens element and the sensor, a more compact construction is possible.
Third Party Lenses.
Until 2018, all third party lenses were manual except from the three Zeiss Touit lenses. In 2019, Viltrox introduced a 85 mm f/1.8 AF lens lacking an aperture ring. In April 2020, the same company introduced a 33 mm f/1.4 lens with an aperture ring. Two more Viltrox lenses, 23 mm f/1.4 and 56 mm f/1.4, are announced for 2020. On March 6, 2020, Tokina announced three atx-m autofocus lenses for Fujifilm X-mount to be introduced in autumn 2020. Toshihisa Iida, the General Manager of Fujifilm's Optical Device and Electronic Imaging Products Division, explained on April 14, 2020 that Fuji followed plans on opening the X-mount up to third-party lens manufacturers. The manufacturer Kenko Tokina was mentioned in this interview.
Autofocus lenses.
Carl Zeiss lenses.
The Touit line of compact lenses from Carl Zeiss AG is purposely designed for APS-C like camera bodies. The optics of these lenses are designed by Carl Zeiss, but the design for manufacturing is done by the Japanese manufacturer Cosina. The Touit lenses are produced for a Fujifilm X-mount and Sony E-mount. Because Fujifilm did not share the specifications of the X-mount, Carl Zeiss never received officially the license for releasing X-mount lenses. The Touit lenses are therefore non-certified.
Tokina lenses (as of April 2020).
Announced March 2020 with a release date of autumn 2020.
Manual lenses.
Manual lenses provide no Exif data transfer, no autofocus, no automatic aperture control, and no lens-based image stabilizer.
7artisans lenses (as of August 2019).
Shenzhen 7artisans Photoelectric Technology Co., Ltd.
B.I.G. ultra macro lens (as of August 2019).
B.I.G. Brenner Import- & Großhandels GmbH
Meike lenses (as of August 2019).
Hongkong Meike Digital Technology Co., Ltd.
Samyang lenses.
Lenses are sold under the interchangeable Samyang, Rokinon, Walimex, and Bower brand names.
Voking by Bilora lenses (as of August 2019).
BILORA GmbH
Zhongyi Optics (Shenyang Zhongyi Optics) lenses.
Zhongyi Optics lenses are sold under the "Mitakon" brand.
Bayonet adaptors (August 2019).
Full frame Lenses with various bayonets can be mounted to Fuji X-mount bodies with suitable adaptors. A multitude of adaptors are available from brands like E&F Concept, Fringer, Kipon, Mitakon Zhongyi, Novoflex, Viltrox.
Beyond multiple passive adaptors (manual operation only, no EXIF data transfer), there are active ones available to mount Canon EF lens mount lenses to Fuji X-mount.