Fujica X mount is a lens mount designed by Fujifilm in 1979 for 35mm film cameras. It is a bayonet mount with three tabs, a focal flange distance of 43.5mm, and a throat diameter of 49mm, with a 65° clockwise lock.

The lens mount was discontinued with the advent of autofocus, in 1985.

X-Fujinon lenses

• EBC X-Fujinon.F16mm F2.8DMfisheye lens
• EBC X-Fujinon.SW19mm F3.5DM
• EBC X-Fujinon.W24mm F2.8DM
• EBC X-Fujinon.W28mm F3.5DM
• X-Fujinon.Z29–‍47mm F3.5–‍4.2DM
• EBC X-Fujinon.W35mm F2.8DM
• X-Fujinon.Z43–‍75mm F3.5–‍4.5DM
• EBC X-Fujinon50mm F1.2DM
• X-Fujinon50mm F1.6DM
• EBC X-Fujinon50mm F1.6DM
• X-Fujinon50mm F1.9 FM
• X-Fujinon55mm F2.2
• EBC X-Fujinon.Macro55mm F3.5DMmacro lens
• EBC X-Fujinon.Z70–‍140mm F4–‍4.5DM
• EBC X-Fujinon.Z75–‍150 F4.5DM
• EBC X-Fujinon.Z85–‍225mm F4.5DM
• EBC X-Fujinon.T100mm F2.8DM
• EBC X-Fujinon.T135mm F2.5DM
• EBC X-Fujinon.T135mm F3.5DM
• EBC X-Fujinon.T200mm F4.5DM
• EBC X-Fujinon.T400mm F4.5