Blackmagic Design Blackmagic URSA Mini Pro EF Mount

To clear up any potential confusion, this is NOT Sony Alpha, but Alpa of Switzerland. You will most likely be using the Kern Macro Switar 50mm f/1.8 or f/1.9 apochromat lens on this adapter.

• • • • Increase maximum aperture by 1¹/₃ stop. (with a maximum output aperture of f/0.80)
      • Increase MTF.
      • Makes lens 0.64x wider.
      • Optics designed by Caldwell Photographic in the USA (patent granted).
      • When using with “passive” (without electronic control pin) MFT camcorders/cameras, such as BMCC 2.5K MFT and Digital Bolex D16 MFT, the Speed Booster must be powered by external power source via Micro-USB socket. Input Voltage is 5V DC.  (Battery is NOT included in the box).
      • When using with “active” (with electronic control pin) MFT camcordrs/cameras, such as BMPCC MFT, the Speed Booster can be powered by camera body. no external power source required.
      • Build-in electonics to control lens aperture.
      • The Lens aperture is set by the dial button on the adapter.
      • High performance 32-bit processor and efficient switched-mode power supply.
      • The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.
      • Flocking material coating inside the inner hole to reduce the internal reflection.

• • • • Viewfinder display of aperture, zoom and distance. (Distance display requires lens which supports distance information.)
      • Auto exposure.
      • Assignable function button.
      • Supports image stabilization (IS) lenses.
      • Power is supplied by camera body. No external power source is required.
      • Adapter firmware is user-upgradable through the built-in micro USB port.