Canon Mount Adapter EF-EOS R 0.71x - Canon
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Canon UKCanon Unisex Light Ef-Eos R 0.71X Lens Mount Adapter
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Product Information
Full details
The Canon Mount Adapter EF-EOS R 0.71x is an essential tool for EOS C70 cinema camera users who want to leverage their existing collection of full-frame Canon EF lenses without losing their original field of view. By utilizing a 0.71x magnification optical element, the adapter preserves the full-frame angle of view and provides an additional full stop of light, making it a powerful solution for low-light cinematographers; however, it is specifically designed for the C70 and is not compatible with standard EOS R series mirrorless cameras.
All features
| Brand | Canon |
|---|
Extended Product Information
FAQs
Can I use this adapter on my EOS R5 or R6?
No, this specific adapter is designed exclusively for the Canon EOS C70 cinema camera.
Does this adapter affect lens aperture settings?
Yes, it increases the effective aperture by one full stop, allowing more light onto the sensor.
Is manual focus required with this adapter?
No, it supports full Dual Pixel CMOS AF, provided the lens itself supports autofocus.
Will this adapter change the focal length of my lens?
The 0.71x factor essentially offsets the crop factor of the Super 35 sensor, making the lens behave as if it were on a full-frame sensor.
How heavy is the adapter?
The unit weighs approximately 200 grams.
Troubleshooting
Autofocus is not working correctly
Check the electronic contact points on both the camera and the adapter. Clean them with a dry, clean cloth to ensure proper communication.
Lens metadata not displaying on screen
Ensure the lens is fully locked into place and the camera firmware is updated to the latest version to support the adapter.
Pros and Cons
Pros
- Retains full-frame field of view on Super 35 sensors
- Gains one full stop of brightness for low-light performance
- Full Dual Pixel CMOS AF support
- Seamless transmission of lens metadata to camera
Cons
- Compatible only with the Canon EOS C70
- Adds weight and depth to the camera configuration
- Optical element requires careful cleaning and maintenance
Setup, Compatibility & Care
To install, align the white indicator on the EF lens with the corresponding mark on the adapter, then twist until it clicks. Repeat this process to attach the adapter to the EOS C70 lens mount. Always ensure the camera is powered off before swapping lenses to protect the electronic pins. To maintain the optical performance of the 0.71x element, use a clean, microfiber cloth to gently remove dust or fingerprints. Store the adapter with both front and rear caps in a dry, dust-free environment when not in use to avoid damaging the exposed glass or electronic contact points.