Fujifilm X-Mount vs. Nikon F
Comparing 2 standards across 9 specifications. 9 key differences identified.
The Fujifilm X-Mount (introduced in 2012 for the X-Pro1) is a dedicated APS-C mirrorless bayonet mount featuring a 17.7 mm Flange Focal Distance, a 40.7 mm throat diameter, and a 10-pin electronic interface. Designed exclusively for APS-C image circles, it allows compact lens designs optimized for Fujifilm's proprietary X-Trans CMOS sensors.
The Nikon F-Mount (introduced in 1959 with the legendary Nikon F SLR) is one of the most storied lens mounts in photographic history, maintaining a continuous 46.5 mm Flange Focal Distance and 44.0 mm throat diameter for over 60 years. Spanning non-AI manual lenses to modern electronic-diaphragm AF-S/AF-E glass, over 100 million F-mount lenses were produced.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Flange Focal Distance (FFD)
|
17.70 mm (0.697 in) | 46.50 mm (1.831 in — longest FFD among major 35mm SLR mounts) |
|
Inner Throat Diameter
|
40.70 mm (1.602 in) | 44.00 mm (1.732 in) |
|
Bayonet Tabs
|
3 locking tabs with counter-clockwise mount twist | 3 locking tabs with counter-clockwise twist (opposite of Canon/Sony) |
|
Camera Systems
|
Fujifilm X-T5, X-H2, X-H2S, X-T30 II, X-S20, X-Pro3, X-E4 | Nikon F, F3, FM2, F5 (film), Nikon D850, D780, D6, D7500, D500 (digital DSLRs) |
|
Back Focus Distance
|
Minimum rear optical element clearance of 7.5 mm from sensor | — |
|
Electronic Interface
|
10 contact pins (opened to third parties in 2020: Tamron, Sigma, Voigtländer, Viltrox) | — |
|
Physical Aperture Rings
|
Standard mechanical aperture rings with 1/3-stop clicks on XF lenses | — |
|
Historical Generations
|
— | Non-AI (1959) -> AI (1977) -> AI-S (1981) -> AF screw-drive (1986) -> AF-D (1992) -> AF-S Silent Wave (1998) -> AF-E Electronic diaphragm (2010s) |
|
Aperture Control History
|
— | Spring-loaded mechanical stop-down lever (moved to electromagnetic diaphragm in 'E' lenses) |