Metabones Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x

Canon EF lenses on Sony E-mount cameras with a wider field of view

The Metabones Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x is an active optical adapter designed primarily for APS-C and Super 35 Sony E-mount cameras. It allows compatible full-frame Canon EF lenses to be used while reducing the effective focal length by 0.71x. On a camera with a 1.5x crop sensor, this brings the effective crop factor close to 1.07x, giving a field of view much closer to the lens’s full-frame character. On full-frame Sony bodies, Metabones recommends using APS-C / Super 35 capture mode because the optical image circle does not cover the entire 36 × 24 mm sensor.

One-stop increase in maximum aperture

The optical reducer increases the effective maximum aperture by one stop while also making the lens 0.71x wider. A 24–70 mm f/2.8 lens, for example, behaves approximately like a 17–50 mm f/2.0 combination after the reduction. This is particularly useful for low-light shooting, interviews, documentary work and cinema setups where a wider angle of view and greater light transmission can make an APS-C or Super 35 camera behave more like a larger-format system.

Advanced optics and electronic lens control

Metabones uses a 5-element / 4-group optical design with ultra-high-index tantalum-based glass, developed to improve corner sharpness while reducing distortion and vignetting. The adapter also maintains electronic communication with many compatible EF lenses. Depending on the exact camera, lens and firmware combination, functions can include autofocus, camera-controlled aperture, image stabilization and EXIF transmission with lens name, focal length and aperture data. Metabones also supports in-body stabilization on selected Sony cameras.

Built for professional camera rigs

Both the camera-side and lens-side mounts use precision-machined, chromium-plated brass, and the lens mount includes a leaf-spring mechanism designed to keep the connection tight and reduce play. The interior is flocked to limit unwanted reflections. A removable tripod foot provides an additional support point for heavier lens combinations. Canon EF full-frame lenses are the intended choice; EF-S and other APS-C-format lenses are not officially supported and may vignette or interfere with the optical assembly.

Complete rental set

Our rental package includes the Metabones Canon EF Lens to Sony E Mount T Speed Booster ULTRA 0.71x and a carrying case. Before critical autofocus work, it is worth testing the exact lens and Sony body combination, as AF performance varies between camera generations, lens designs and operating modes.

Rent Metabones Speed Booster ULTRA 0.71x at CamCam Rental

At CamCam you can check current availability online and reserve the adapter together with Sony E-mount cameras, Canon EF lenses, monitors and rigging accessories. If you are unsure which lens and camera combination will give you the field of view, autofocus performance or low-light capability you need, our team can help you configure and test a suitable setup. We also offer delivery and collection, optional on-set assistant support, after-hours returns, free parking and free equipment tests by arrangement. CamCam is open seven days a week, including weekends.