Metabones® Adds 'Native' AF and Smooth Iris to EF Mount Speed Boosters® and Smart Adapters™ by Firmware

Vancouver, Canada, June 23, 2016: Metabones® releases Metabones App 2.3, a major firmware update with the following additional features.


Metabones® has already added fast EF lens autofocus to its Micro Four Thirds Mount Speed Boosters® and Smart Adapters™ last year. With this speedy advantage now extended to E-Mount, EF-Mount lenses are now capable of focusing quickly across the widest variety of mirrorless cameras with trusted Metabones precision and reliability.


The smooth iris feature slows down the movement of the electromagnetic aperture diaphragm so that video footage transitions smoothly when the aperture changes, with reduced tick noise from the lens. The latest Canon and Tamron SP lenses have special support for this feature and Metabones® makes use of it if the lens supports it.




The following lenses have been tested for "native" AF. Refer to Metabones' web site for the most up-to-date list. Lenses equipped with smooth iris support are marked with asterisks. APS-C lenses are not compatible with Speed Booster®.


OSX and Windows versions of the firmware updater are available for download from Metabones' web site. The same download updates Speed Booster® ULTRA, Smart Adapter™ Mark IV, EF to FZ Mount Smart Adapter and all EF Mount to Micro Four Third mount products. Updates to earlier Smart Adapters™ (I, II and III) and the original Speed Booster® are by factory only and are free of charge except for shipping.


About Metabones

Metabones®, together with its allied partners Caldwell Photographic and WB Design, is the pioneer and leader of two key technologies which have catalyzed the transition from mirror to mirrorless. Speed Booster® (winner of the 2013 TIPA Best Photo Accessory Award) makes lenses brighter, wider and sharper, and Smart Adapter™ breaks the lens mount compatibility barrier by electronically integrating interchangeable single-lens reflex (SLR) lenses and mirrorless cameras. Metabones® offers a comprehensive range of adapters covering most popular lens mounts, as well as some rare and exotic ones. "Always on the forefront of innovation without ever setting aside practicality as a professional tool" perhaps best epitomizes Metabones' philosophy.


Downloads links:

Firmware update for EF-E Smart Adapter MARK IV and EF-E Speed Booster ULTRA (Windows)

Firmware update for EF-E Smart Adapter MARK IV and EF-E Speed Booster ULTRA (Mac)

Firmware update for EF-M43 (Windows)

Firmware update for EF-M43 (Mac)