Metabones EF Lens to Micro Four Thirds Speed Booster

Metabones EF Lens to Micro Four Thirds Speed Booster

This item is out of stock

Why Metabones ?

Since its inception, Metabones has been designing and manufacturing lens adapters recognized among professionals and enthusiasts as leaders in design and workmanship.
Contrary to the popular trend of other factories using an aluminum ring painted black on the camera-body-side, we instead take no short-cut but use precision-machined brass with chromium plating on both the camera-body and the lens sides of our adapters, in order to ensure smooth mounting, great appearance, and durability. The lens side of the adapter features a strong leaf-spring structure, strengthening the adapter-lens connection and ensuring tightness of the lens in order to reduce wear and prevent focus errors and optical alignment issues from appearing.
Metabones uses matte-black treatment to keep internal reflection to a minimum in order to maintain the maximum optical quality possible with the lens.

All Metabones Adapters follow this tradition of uncompromising precision, robust build quality and outstanding finish. Our new Smart AdapterTM series of products add industry-leading electronic interfacing technology from Canada, with true electronic control of the lens' aperture directly from the camera body.


The Canon EF Lens to Micro Four Thirds Speed Booster (MB_SPEF-m43-BM1) is not compatible with Olympus E-M10, E-M1, E-M5 . Olympus E-M10, E-M1, E-M5 users please choose another version called "Canon EF Lens to Micro Four Thirds Speed Booster S Version (MB_SPEF-m43-BM2)". S version must use with active MFT mount carmeas, such as OMD, GH4 and BMPCC, but not for passive MFT mount cameras e.g. BMCC 2.5K. 

  • Increase maximum aperture by 1 stop. 
  • Increase MTF.
  • Makes lens 0.71x wider.
  • Build-in electronics to control lens aperture.
  • The lens aperture is set by the controls on the camera body.
  • Powered by camera body. no external power source required. (also accept 3rd party external power supply via MicroUSB socket when using with passive MFT mount camera e.g. BMCC 2.5K) 
  • High performance 32-bit processor and efficient switched-mode power supply.
  • The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.

Shop, buy and review Metabones EF Lens to Micro Four Thirds Speed Booster at the lowest discount price in India with free shipping, EMI from authorized offical dealer with moneyback guarantee.