Fujica X-mount

The Fujica X-mount is a lens mount standard developed by Fuji Photo Film Co., Ltd. (now Fujifilm) for their range of 35mm single-lens reflex (SLR) cameras produced from the late 1960s to the early 1980s. The mount is characterized by a bayonet flange, allowing for relatively quick lens changes.

Key features of the Fujica X-mount include:

• Bayonet Mount: The bayonet design provides a secure and repeatable connection between the lens and camera body.
• Flange Focal Distance: The flange focal distance (the distance between the lens mounting flange and the film/sensor plane) is a critical parameter in lens mount design, affecting lens design and compatibility. The specific flange focal distance for the Fujica X-mount is a defining characteristic.
• Mechanical Linkages: The mount incorporates mechanical linkages for features such as automatic diaphragm control, allowing the camera to control the lens aperture.
• Manual Focus: All lenses designed for the Fujica X-mount are manual focus lenses.

The Fujica X-mount system was discontinued in favor of other mounting systems as autofocus technology became prevalent. While natively incompatible with modern autofocus lenses, adapters exist that allow Fujica X-mount lenses to be used on some contemporary digital cameras, albeit usually with limitations such as manual aperture control and focusing. Due to the manual nature of the lenses and the adapter requirements, its usage is generally associated with vintage photography enthusiasts.