The Electronic mount adapter EF-MFT can change the EF/EF-S lens over M4/3 Camera and meanwhile can control the Aperture from Camera, which satisfy all the photography or video users who need this super combination. Before usage of the adapter, please ensure the adapter is compatible with your camera and lens. 

Features: 
EXIF signal transmitting and being displayed on Camera Screen. 
Aperture can be controlled and adjusted from Camera. 
Built-in IS function. 
Aluminum Alloy made, powerful and stable. 
Gold-plating contact, excellent transmitting effect. 

Specifications: 
Brand: Commlite 
Product Model: CM-EF-MFT 
Material: Aluminum alloy 
Compatible Lens: For EF/EF-S series lens 
Compatible Camera: For M4/3 mount camera 
Front Installation: EF/EF-S series lens 
Back Installation: M4/3 mount camera 
Camera-mount outer diameter: 39mm 
Lens-mount outer diameter: 67mm 
Item Size: 7 * 2.8cm / 2.8 * 1.1in (Dia. * Thickness) 
Item Weight: 89g / 3.1oz 
Package Size: 10.8 * 9.7 * 5.7cm / 4.3 * 3.8 * 2.2in 
Package Weight: 135g / 4.8oz 

Compatibility: 
M4/3 Cameras: 
For Olympus PEN E-P1 P2 P3 P5 E-PL1 PL1s PL2 PL3 PL5 PL6 E-PM1 PM2 OM-D E-M5 E-M1; 
For Panasonic Lumix DMC-GH1 GH2 GH3 GH4 GX7 G1 G2 G10 G3 G5 G6 GF1 GF2 GF3 GF5 GF6 GX1 GM 
For BMPCC 

EF/EF-S Lenses: 
For Canon (Zoom) 
EF 10-22 /3.5-4.5 USM 
EF 16-35/2.8L USM 
EF 16-35/2.8L II USM 
EF 17-40/4L 
EF-S 17-55/2.8 IS USM 
EF-S 17-85/4-5.6 IS USM 
EF 8-15/4L USM 
EF-S 18-55/3.5-5.6 
EF-S 18-55/3.5-5.6 IS II 
EF-S 18-135/3.5-5.6 IS 
EF 20-35/2.8L (Ver.18) 
EF 22-55/4-5.6 
EF 24-70/2.8L (I) 
EF 24-105/4L IS USM 
EF 28-70/3.5-4.5 II 
EF 28-80/3.5-5.6 II 
EF 28-135/3.5-5.6 IS USM 
EF 35-80/4-5.6 
EF 35-350/3.5-5.6L 
EF-S 55-250/4-5.6 IS 
EF 70-200/2.8L IS USM (I) 
EF 70-200/4L IS USM 
EF 70-300/4-5.6L IS USM 
EF 70-300/4-5.6 DO IS USM 
EF 80-200/2.8L 
EF 100-300/4.5-5.6 USM 
EF 100-400/4.5-5.6L IS USM 

For Canon (Fixed focus) 
EF 14/2.8L 
EF 20/2.8 USM 
EF 24/1.4L II 
EF 24/2.8 (old version) 
EF 35/1.4L USM 
EF 40/2.8 STM 
EF 50/1.2L USM 
EF 50/1.4 USM 
EF 50/1.8 II 
EF 50/2.5 macro 
EF 85/1.2L II USM 
EF 85/1.8 USM 
TS-E 90/2.8 
EF 100/2.8L IS USM macro 
EF 135/2L USM 
EF 180/2.8L macro 
EF 200/2.8L II USM 
EF 300/4L IS USM 
Extender EF 1.4x III 
Extender EF 2x (I) 
Planar 50/1.4 
Planar 85/1.4 
EF 180mm f/3.5L Macro USM 

For Sigma 
10-20 /3.5 EX DC HSM 
12-24/4.5-5.6 I  DG HSM 
12-24/4.5-5.6 II  DG HSM 
17-35/2.8-4 EX HSM ASPH 
17-70 /2.8-4 DC Macro OS HSM 
18-125/3.5-5.6 DC OS HSM 
24-70/2.8 EX HSM 
150-500/5-6.3 DG OS HSM 
20 /1.8 EX DG 
30/1.4 DC HSM 
35 /1.4 DG 

For TAMRON 
18-270/4.5-6.3 VC 
SP 28-75/2.8 
24-70VC 
SP 70-200/2.8 Di VC 
SP 150-600mm f/5-6.3 Di VC USD 
90/2.8 (172E) 
28-75/2.8 XR Di LD 
ZE Distagon 21/2.8 
ZE Distagon 15/2.8 
ZE Makro-Planar 50/2 
ZE Makro-Planar 100/2 

Package List: 
1 * Electronic lens mount adapter 

Note: 
Camera and lens are not included. 
EXIT and Aperture parameter can be transmitted to camera and be controlled; Manual focus, can reach infinity focus. 
The lens will automatically calculate the exposure after setting the corect shooting or video mode. 
In shooting mode, while the camera shutter can't be pressed down (or with non-lens prompt), please change the settings to "Release shutter without lens" or "Aperture priority".