NEEWER EOS EF to RF Lens Adapter

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All Neewer products carry a 1-Year WarrantyΒ and 30-day Retrun. Learn more at Warranty Policy.

Shipping Policy

Shipping from local warehouse based on your area, normally it takes 2~10 days for the delivery, Learn more at Shipping Policy.

Firmware & Manual

To download the product firmware or manual, please visit our Download Center.


⚠️WARNING:This product can expose you to chemicals including [Lead and Phthalates], which
is [are] known to the State of California to cause cancer. For more information go to


  • Attach all EF/EF-S lenses to your EOS R camera for seamless compatibility.
  • The control ring enables smooth adjustment of exposure settings, such as shutter speed, aperture, ISO, and exposure compensation.
  • Electrical contacts transfer EXIF data from your camera body and maintain full autofocus and image stabilization capacities in your lens.
  • Firmware updates are available for bug fixes and optimized performance. A built-in micro USB port on the mount adapter lets you connect to PCs for instant updating.


  • Compatible Lenses: EF/EF-S lenses
  • Compatible Cameras: EOS R cameras (EOS R, EOS Ra, EOS RP, EOS R5, EOS R6, EOS R3)
  • Front Mount: EF mount
  • Rear Mount: RF mount
  • USB Connection: Micro USB
  • Front Mount Diameter: 2.56” / 65mm
  • Rear Mount Diameter: 2.64” / 67mm
  • Length: 1.26” / 32mm
  • Weight: 3.7oz / 105g

Package Contents

  • 1 x NEEWER NW-EF-EOSR ARC Mount Adapter
  • 1 x User Manual
  • 1 x Front Cap
  • 1 x Rear Cap