Viltrox EF-R3 for Canon EF to Canon RF Adapter


  • Support Tracking Auto Focus
  • 0.71X Focal Reducer
  • Precision Metal Bayonet
  • USB Firmware Update

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Viltrox EF-R3 for Canon EF to Canon RF Adapter

In The Box

  • Viltrox EF-R3 for Canon EF to Canon RF Adapter
  • Mount Adapter
  • Front Cap & Rear Cap
  • Allen Wrench
  • User Manual


  • Viltrox EF-R3 Mount Adapter allows Canon EF mount lens series to pair with Canon RF mount cinema cameras especially for Canon EOS C70/Red Komodo models.
  • The adapter offers a 0.71x focal reducer, supports full dual-pixel, IS lens stabilization and electronic aperture control.
  • It also enables EXIF info transmission and provides a USB port for firmware upgrade.
  • Support is Lens Stabilization
    Effectively eliminate image ghosting and blurring caused by sports shooting or shaking when holding.
  • USB Firmware Update
    The adapter ring is equipped with a firmware upgrade interface, which can be upgraded to be compatible with new camera models and lenses on the market.
    Make the performance of the adapter ring stronger.


  • Model No : EF-R3
  • Name : Speed Booster
  • Focus Mode : Auto Focus
  • Compatible Lens : Canon Series Lenses
  • Compatible Camera : EOS C70/RED KOMODO
  • Optical Lenses : 4 Elements in 4 Groups
  • Focal Length Factor : 0.71X
  • Firmware Upgrade : Micro USB
  • Tripod Slot : 1/4" Standard Interface
  • Diameter and Length : 72*82*28mm
  • Weight : ≈209g

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