Metabones T Speed Booster XL 0.64x Adapter for Full-Frame Canon EF Lens to MFT

Metabones T Speed Booster XL 0.64x Adapter (Canon EF to Micro Four Thirds)
Optical Focal Reducer & Lens Adapter – 0.64x Crop Reduction, 1.3-Stop Light Increase, Full Electronic Communication & Integrated Tripod Foot

The Metabones T Speed Booster XL 0.64x Adapter allows full-frame Canon EF-mount lenses to be mounted onto select Micro Four Thirds (MFT) mirrorless camera bodies. Engineered with a specialized 6-element, 4-group optical design, this focal reducer condenses light from full-frame glass onto the smaller MFT sensor. This process effectively reduces the camera system’s crop factor by 0.64x—widening the apparent angle of view—while simultaneously increasing the lens’s maximum aperture speed by 1.3 stops across its entire zoom and focus range.

Built for professional production environments, the adapter features full electronic communication, enabling autofocus, lens-based image stabilization, on-camera aperture adjustment, and EXIF metadata transfer with compatible camera and lens combinations. Constructed with durable aluminum housing and precision-milled brass mounting rings, the T Speed Booster XL includes an internal anti-reflective barrel coating, an integrated jog dial for manual aperture adjustment on select Panasonic bodies, and a detachable, Arca-Swiss-compatible tripod foot equipped with 3/8″ threading.

Key Features & Performance

Full-Frame EF to MFT Adaptation: Enables full-frame Canon EF-mount lenses to mount natively on select Micro Four Thirds camera bodies.

0.64x Focal Reduction: Widens the lens field of view to capture more of the frame while reducing the inherent MFT crop factor.

1.3-Stop Exposure Increase: Magnifies light output across the entire aperture range, yielding 1.3 additional stops of light for low-light capabilities and shallower depth of field.

Full Electronic Integration: Supports autofocus, camera-controlled aperture settings, image stabilization (IS), and EXIF metadata logging when paired with compatible hardware.

Advanced Optical Design: Features 6 glass elements in 4 groups to preserve edge-to-edge sharpness, contrast, and color fidelity.

Integrated Aperture Jog Dial: Provides tactile, incremental aperture control and quick push-button wide-open exposure previewing on supported Panasonic cameras.

Arca-Swiss Tripod Foot: Includes a detachable tripod foot featuring 3/8″ thread compatibility and an Arca-Swiss style quick-release profile to relieve strain on the camera mount.

Camera Compatibility

Panasonic Lumix: DMC-GH4, GH3, G3, G5, G6, G10, GF3, GF5, GF6, GX1

Olympus PEN: E-PL7

Blackmagic Design: Cinema Camera (MFT Mount), Pocket Cinema Camera (Original MFT)

Technical Specifications

Adapter Type: Optical Focal Reducer / Lens Adapter

Camera Mount: Micro Four Thirds (MFT) Native

Lens Mount: Canon EF (Full-Frame Lenses)

Optical Magnification Factor: 0.64x

Light Gain Increase: 1.3 Stops

Optical Construction: 6 Elements in 4 Groups

Material Construction: Aluminum Alloy Frame with Brass Mounting Rings

Tripod Mount Interface: Detachable Foot with 3/8″ Thread (Arca-Swiss Compatible)