Fujifilm X-Mount vs. Micro Four Thirds 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 Micro Four Thirds Mount, introduced in 2008 by Olympus and Panasonic as the first mirrorless system built as a dedicated open standard (rather than an adapted rangefinder mount, as with the earlier 2004 Epson R-D1), features a 19.25 mm Flange Focal Distance, a 38.0 mm throat diameter, and an 11-pin all-electronic bayonet interface. Governing an open consortium, it is used across OM System, Lumix, Blackmagic Design, and DJI aerial cameras.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Flange Focal Distance (FFD)
|
17.70 mm (0.697 in) | 19.25 mm (0.758 in) |
|
Inner Throat Diameter
|
40.70 mm (1.602 in) | 38.00 mm (1.496 in) |
|
Bayonet Tabs
|
3 locking tabs with counter-clockwise mount twist | 3 symmetrical stainless steel tabs |
|
Electronic Interface
|
10 contact pins (opened to third parties in 2020: Tamron, Sigma, Voigtländer, Viltrox) | 11 gold-plated electronic contacts (shared protocol between OM System and Panasonic) |
|
Camera Systems
|
Fujifilm X-T5, X-H2, X-H2S, X-T30 II, X-S20, X-Pro3, X-E4 | OM System OM-1 Mark II, Panasonic Lumix GH6 / G9 II, Blackmagic Pocket Cinema Camera 4K, DJI Inspire 3 X9 MFT |
|
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 | — |
|
Historic Milestone
|
— | First mirrorless system built as a dedicated open standard, launched with the Panasonic Lumix G1 (2008) -- the earlier 2004 Epson R-D1 was a mirrorless interchangeable-lens camera, but on an adapted rangefinder mount, not a purpose-built open standard |
|
Consortium Members
|
— | OM Digital Solutions (Olympus), Panasonic, Blackmagic Design, DJI, Sharp, Voigtländer, Laowa |