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Metabones Canon EF to Sony NEX E-mount Smart Adapter Mark IV


Metabones Canon EF to E-mount Smart Adapter Mark IV (Non-Speed booster version)

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Metabones Canon EF to Sony NEX E-mount Smart Adapter Mark IV


The latest version of the Metabones Smart Adapter for Canon EF lenses to the Sony E-mount eliminates flares, light leaks and gives camera operators the ability to adapt a wide variety of Caon EF and EF-S lenses ot the Sony A7s, Sony FS7 and the Sony FS700. The robust design and high-quality materials ensures stability and rigidity of your rig. 




This Smart AdapterTM has the following features:

  • True electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes.
  • Powered by camera body. No external power source required.
  • Wide open button (opposite of depth-of-field preview function) makes manual focusing easy.
  • The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
  • High performance 32-bit processor and efficient switched-mode power supply.

Enhancement on MARK IV vs. MARK III:

  • The new design of inner housing in MARK IV has a bigger inner hole. Improving the Tilt shift lens preformance. 
  • The inner hole is painted with matt coating. This can further reduce the internal reflection. 


SupportedNot supported

EF lenses (see below for list of tested lenses)

EF-S lenses (see note 1)

Image stabilization (IS) lens

Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)

EXIF (focal length, aperture, zoom range)

P, A, S, M exposure modes

Autofocus (see autofocus support section below)

Distance and zoom display on VG and FS series camcorders (see note 3)

Auto magnify (see note 2)

Contax N mount lenses modified to Canon EF by Conurus

Contax 645 NAM-1 adapter modified to Canon EF by Conurus

Sigma, Tamron and Tokina lenses in Canon EF mount (see note 3)

Lens correction such as peripheral shading, CA and distortion

Focus confirmation "chip" (e.g. Dandelion)

Stacking another lens mount adapter on top (see note 4)

Lens: Tamron SP 17-50mm F/2.8 XR Di II VC


  1. Vignetting at corners may occur for certain EF-S lenses because they are designed to cover a 1.6x crop image circle but Sony NEX has a 1.5x crop sensor.
  2. Requires lenses supporting distance information.
  3. A third party zoom lens may need to be