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Metabones T CINE Smart Adapter Mark II for Canon EF Mount Lens to RF Mount Camera

BH #MEMBEFEFRBT2 • MFR #MB_EF-EFR-BT2
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Metabones T CINE Smart Adapter Mark II for Canon EF Mount Lens to RF Mount Camera
Key Features
  • Canon EF Lens to RF Camera Body
  • Positive-Lock Mechanism to Secure Lens
  • Brass Mounting Rings
  • Rubber Gasket Blocks Dust and Moisture
The Metabones T CINE Smart Adapter Mark II is designed to allow a Canon EF or EF-S mount lens to be used with a Canon RF mount camera with electronic communication and control, including autofocus, aperture, Exif, and image stabilization lens support. This high-precision device is constructed from aluminum alloy for lightweight durability and has brass mounting rings to prevent further wear and tear. The adapter features a positive-lock EF mount.
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Metabones MB_EF-EFR-BT2 Overview

The Metabones T CINE Smart Adapter Mark II is designed to allow a Canon EF or EF-S mount lens to be used with a Canon RF mount camera with electronic communication and control, including autofocus, aperture, Exif, and image stabilization lens support. This high-precision device is constructed from aluminum alloy for lightweight durability and has brass mounting rings to prevent further wear and tear. The adapter features a positive-lock EF mount.

The adapter includes a removable tripod collar with a detachable Arca-type compatible tripod foot, and it has a matte black internal surface that minimizes the potential for reflections within the adapter barrel to prevent unwanted glare in the image. If the lens includes autofocus, image stabilization, and camera-controlled aperture functions, this adapter allows those features to be used. If an attached lens is also capable of generating Exif metadata when used with a directly compatible camera, the adapter will allow that information to be saved along with the image files generated.

Quick Features
  • Allows a Canon EF or EF-S mount lens to be used on a Canon EOS RF-mount camera
  • Electronic control supported: Autofocus, aperture control, Exif, and image stabilization (IS)
  • Powered by camera body; with most lenses, no external power source is required
  • Matte black internal surface minimizes reflections within the adapter barrel
  • Rubber gasket protects the RF mount connection from dust and moisture
  • Aluminum alloy construction with chromium plating
  • Brass mounting rings resist wear and tear
  • Arca-type mounting foot with 1/4"-20 tripod thread
  • Secure body and lens EF mount positive locking mechanisms
Compatibility
Cameras

  • Canon RF camera: EOS R, EOS RP, EOS R3, R5, R6, R7, R10, EOS C70
  • RED KOMODO camera

Lenses

  • Canon EF mount Lens
  • Canon EF-S mount Lens
  • Canon EF-Extender (Teleconverter)
  • Carl Zeiss EF mount Lens
  • Sigma EF mount Lens
  • Tamron EF mount Lens
  • Tokina EF mount Lens
  • Contax N mount lenses modified to Canon EF by Conurus

NOTE: EF-M mount lenses are not supported by this adapter.

Metabones MB_EF-EFR-BT2 Reviews

Doesn’t fit C400 with support foot attached

By MM
Rated 3 out of 5
Date: 2026-01-29

Just a heads up to anyone planning on purchasing this for the C400: the support foot doesn’t clear the C400’s body which juts out slightly toward the bottom. If you forgo the foot then it works just fine, albeit without the support.

Works OK, but difficult to attach.

By James K.
Rated 3 out of 5
Date: 2025-01-13

This Metabones adapter functions adequately, but can create a mechanical difficulty. When attaching to the lens. It is easy to over-tighten the adapter because no audible 'click' can be heard when contact is made. Consequently, you have to be very careful not to damage either component when attempting to separate lens from adapter.

See any errors on this page?

I have the mark I version of this for my Komodo ...

I have the mark I version of this for my Komodo OG but it never sent the iris data to the camera. Does this one work correctly?
Asked by: Christian
Yes, the Metabones T CINE Smart Adapter Mark II for Canon EF Mount Lens to RF Mount Camera would support full electronic communication with the RED KOMODO; this does include aperture settings.
Answered by: Elliot A
Date published: 2025-11-07

Can this adapter be used to adapt full frame EF ...

Can this adapter be used to adapt full frame EF lenses to the RF mount on the RED V-Raptor 8K VV? Thanks very much!
Asked by: Bob
Yes, the Metabones T CINE Smart Adapter Mark II for Canon EF Mount Lens to RF Mount Camera could be used to mount full frame EF lenses to the RED DIGITAL CINEMA V-RAPTOR [X] 8K VV Camera.
Answered by: Tim Z
Date published: 2024-11-04

What cage or adapter can I use to tight this ...

What cage or adapter can I use to tight this adapter firmly to RED Komodo body with the 1/4 screw?
Asked by: Jaime J
The 8Sinn Camera Cage for RED KOMODO and KOMODO-X, BH #8SRKXC, along with the 8Sinn Lens Adapter Support for 8Sinn RED KOMODO Cage, BH #8S8LASFORRKC, would be an option for supporting the Metabones T CINE Smart Adapter Mark II for Canon EF Mount Lens to RF Mount Camera on the RED DIGITAL CINEMA KOMODO 6K Digital Cinema Camera (Canon RF).
Answered by: Tim Z
Date published: 2025-03-16
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