Metabones Firmware 1.1 Available for X-Mount to Canon EF Mount

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Metabones released firmware 1.1 for Fujifilm X-Mount adapters for Canon EF mount

Canon EF Ver.1.10 Mac Window User Manual

Firmware upgrade for Canon EF to Fuji X mount  T Smart AdapterTM and EF-E Speed Booster® ULTRA 0.71x
This information is for the following models:

  • Canon EF to Fuji X T Speed Booster® ULTRA 0.71x (MB_SPEF-X-BT1)
  • Canon EF to Fuji X T CINE Speed Booster® ULTRA 0.71x (MB_SPEF-X-BT2)
  • Canon EF to Fuji X T Smart AdapterTM (MB_EF-X-BT1)
  • Canon EF to Fuji X T CINE Smart AdapterTM (MB_EF-X-BT2)

Disclaimer: these release notes only highlights significant changes to the firmware. There may have been other changes that are not documented.


  • Name: Firmware update V1.10 for EF-X T Speed Booster® ULTRA 0.71x/ Smart AdapterTM
  • Release date: 01 Sept 2020
  • Benefits and improvements:
    • IBIS now works with any lens including long telephotos and high-ratio zooms.
    • Fujifilm XF teleconverters now supported with X-T4.
    • Slow down hunting when XF teleconverter is used to increase the chance of getting a lock.
    • Support iris display in T-stops with cinema lenses. (The cinema lens has to support electronically transmitting iris position.)


  • Name: Firmware update V1.00 for EF-X T Speed Booster® ULTRA 0.71x/ Smart AdapterTM
  • Initial date: 05 June 2020

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