Fujifilm X-Mount vs. Leica L-Mount
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 Leica L-Mount (developed by Leica Camera in 2014 and formalized under the L-Mount Alliance with Panasonic, Sigma, DJI, and Leitz Cine in 2018) is a 4-tab bayonet mount featuring a 20.0 mm Flange Focal Distance, a 51.6 mm throat diameter, and a robust stainless steel clamping mechanism covering both full frame and APS-C formats.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Flange Focal Distance (FFD)
|
17.70 mm (0.697 in) | 20.00 mm (0.787 in) |
|
Inner Throat Diameter
|
40.70 mm (1.602 in) | 51.60 mm (2.031 in) |
|
Bayonet Tabs
|
3 locking tabs with counter-clockwise mount twist | 4 asymmetrical stainless steel locking tabs (high mechanical rigidity for cinema primes) |
|
Electronic Interface
|
10 contact pins (opened to third parties in 2020: Tamron, Sigma, Voigtländer, Viltrox) | 8 gold-plated electronic spring contacts (standardized cross-manufacturer protocol) |
|
Camera Systems
|
Fujifilm X-T5, X-H2, X-H2S, X-T30 II, X-S20, X-Pro3, X-E4 | Panasonic Lumix S5 II / S5 IIX / S1H / BS1H, Leica SL2 / SL3 / Q series, Sigma fp / fp L, DJI Ronin 4D |
|
Back Focus Distance
|
Minimum rear optical element clearance of 7.5 mm from sensor | — |
|
Physical Aperture Rings
|
Standard mechanical aperture rings with 1/3-stop clicks on XF lenses | — |
|
Alliance Partners
|
— | Leica Camera AG, Panasonic Corporation, Sigma Corporation, DJI, Ernst Leitz Wetzlar GmbH, Blackmagic Design |
|
Coverage Formats
|
— | SL (35mm Full Frame 36×24 mm) and TL (APS-C 23.6×15.7 mm) |