Micro Four Thirds Mount vs. Sony E-Mount
Comparing 2 standards across 9 specifications. 9 key differences identified.
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.
The Sony E-Mount (introduced in 2010 for NEX mirrorless and expanded in 2013 to 35mm full frame as FE) is a 3-tab bayonet lens mount featuring a 18.0 mm Flange Focal Distance (FFD), a 46.1 mm throat diameter, and a 10-pin high-speed electronic interface. It is the most widely adopted open third-party full-frame mirrorless mount in the photographic industry.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Flange Focal Distance (FFD)
|
19.25 mm (0.758 in) | 18.00 mm (0.709 in — distance from lens mount mating surface to sensor plane) |
|
Inner Throat Diameter
|
38.00 mm (1.496 in) | 46.1 mm (1.815 in) |
|
Bayonet Tabs
|
3 symmetrical stainless steel tabs | 3 asymmetrical locking tabs with clockwise twist lock |
|
Electronic Interface
|
11 gold-plated electronic contacts (shared protocol between OM System and Panasonic) | 10 gold-plated leaf contact pins (supports real-time eye-AF tracking, OSS, active lens breathing compensation) |
|
Camera Systems
|
OM System OM-1 Mark II, Panasonic Lumix GH6 / G9 II, Blackmagic Pocket Cinema Camera 4K, DJI Inspire 3 X9 MFT | Sony A7 / A9 / A1 series, FX3 / FX6 cinema lines, A6000-series APS-C bodies |
|
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 | — |
|
Full-Frame vs APS-C
|
— | FE lenses cover 36×24 mm full frame; E lenses cover APS-C (auto-crops on full-frame bodies) |
|
Third-Party Protocol License
|
— | Open disclosure to lens manufacturers (Sigma, Tamron, Zeiss, Samyang, Voigtländer) |