Electronic

• Autofocus
• Phase-detection autofocus (PDAF) on supported camera bodies*
• Can be powered either by camera body or by third-party external 5V power source (not included)
• Iris/aperture controlled by the camera body
• Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses
• Image stabilization (IS) lens support
• Support for cameras with in-body image stabilization (IBIS)
• Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
• EXIF (focal length, aperture, zoom range)
• Distance and zoom display (requires lenses supporting distance information)
• Cinema EOS lens support (CN-E 18-80mm T4.4 L), including AF (may require external 5V power through micro USB port), auto iris and servo zoom
• LED indicator shows communication status.

Other

• The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
• Flocking to reduce internal reflection.
• Rubber gasket protects the MFT mount connection from dust and moisture.
• Compatible with most of the MFT mount cameras, including G9II, GH7, GH6, GH5, Blackmagic Cinema Camera, Blackmagic Pocket Cinema Camera.

• AF may not work if the maximum aperture of the lens plus any EF Extender or other teleconverter attached is smaller than f/8.
• Some Tamron lenses may have unsatisfactory AF accuracy.
• No support for Focus Stacking and Focus Bracketing.
• EF-mount lenses are not silent but may make audible click noises during autofocus operation and iris changes which may be picked up by the built-in microphone of the camera. An external microphone is recommended for video.
• Use of Canon Cinema lenses such as CN-E 18-80mm T4.4 L IS KAS S for still photography is not supported.
• Iris changes are in 1/8 stop steps which may be noticeable in video recordings. Programmed exposure mode and shutter priority exposure mode should not be used for video. This limitation does not apply to Cinema EOS lenses which permit fine resolution iris control, such as CN-E 18-80mm T4.4 L IS KAS S.
• No support for in-camera correction such as peripheral shading, CA and distortion

 Compatible Lenses

 Incompatible Lenses

• Canon CN Cinema Lens

• Canon EF Lens

• Canon EF Extender 

• Carl Zeiss ZE Lens

• Sigma EF Lens

• Tamron EF Lens

• Tokina EF Lens

• Contax N lenses modified by Conurus

• Canon EF Extender 1.4x (all versions)

• Canon EF Extender 2x (all versions)

• Laowa 200mm F/2.0
• Tamron 70-300mm F/4-5.6 VC USD A005
• Tokina Opera 50mm F/1.4

 Limitations 

No Lens OIS/VC Support

• Tamron SP 15-30/2.8 VC USD A012 
• Tamron 150-600mm F/5-6.3 VC USD A011 
• Tamron 28-300mm f/3.5-6.3 XR Di Macro A06

 Cannot zoom to widest position even after modification

• Canon EF-S 18-135mm F/3.5-5.6 IS STM
• Canon EF-S 18-135mm F/3.5-5.6 IS USM (Nano)

 No AF Support

• Tamron SP 17-50mm F/2.8VC B005
• Tamron 28-300mm F/3.5-6.3 VC A20
• Sigma 18-125mm F/3.5-5.6DC OS HSM

 No Iris Support without External Power Supply

• Canon EF24-70mm F/2.8L USM (I) 
• Canon EF100mm F/2.8 USM Macro (non-L)
• Tamron 18-270mm F/3.5-6.3 VC PZD B008

 AF may not be accurate

• Canon EF 50mm f/1.8 II 
• Canon EF 28-70mm f/3.5-4.5 II
• Sigma 50mm f/1.4 EX HSM
• Tamron 18-250mm f/3.5-6.3 Di II Macro A18
• Tamron 24-70mm f/2.8 VC USD A007
• Tamron 28-300mm f/3.5-6.3 XR Di Macro A06
• Tokina AT-X PRO 11-16mm f/2.8 DX (I)

Unsupported List 

• Canon-brand EF-S lens require modification to fit or may remain incompatible even after modification
• Panasonic and Olympus/OM Tele-converter
• Lens correction such as peripheral shading, CA and distortion 
• Focus confirmation "chip" (e.g. Dandelion)
• M42 screw mount adapters _{(see note 3)}
• Stacking non-Metabones/non-Conurus mount adapters on top (see note 3 and list of lenses which require modification below.)

Leica R

Super-Elmar-R 15mm

Elmarit R 28/2.8

Elmarit R 35/2.8

Summicron R 50/2

Nikon F

20/2.8 AI-S

Olympus OM

OM 18/3.5

OM 21/2

OM 21/3.5

OM 28/2.8

OM 50/1.8

Pentax K

Every Pentax K-mount lens has a protruding fin and an aperture lever. It does NOT fit.