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Canon Mount Adapter EF-EOS R 0.71x

BH #CAMAEFRF71X • MFR #4757C001
Canon Mount Adapter EF-EOS R 0.71x
Key Features
  • Canon EF Lens to Canon RF-Mount Body
  • Designed for EOS C70 Cinema Camera
  • Adapt Full-Frame Lens to Super 35 Body
  • Increases Angle of View by 0.71x
Extending the range of compatible lenses while maintaining their original field of view, the Canon Mount Adapter EF-EOS R 0.71x permits attaching EF-mount lenses to RF-mount cine and mirrorless cameras. Intended for cameras featuring a Super 35 sensor size, this adapter also incorporates an optical system to increase the effective angle of view by 0.71x, reducing the effects of a full-frame to Super 35 crop factor and increasing the maximum aperture performance by one stop. Electric contacts are also incorporated into the adapter's design and maintain full communication between the camera and lens, as well as support metadata transmission and use of Dual Pixel AF with select Canon EF lenses. Also, the adapter has been specifically designed for the EOS C70 cinema camera and features four screws and a split locking collar to ensure a secure attachment.
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Canon 4757C001 Overview

Extending the range of compatible lenses while maintaining their original field of view, the Canon Mount Adapter EF-EOS R 0.71x permits attaching EF-mount lenses to RF-mount cine and mirrorless cameras. Intended for cameras featuring a Super 35 sensor size, this adapter also incorporates an optical system to increase the effective angle of view by 0.71x, reducing the effects of a full-frame to Super 35 crop factor and increasing the maximum aperture performance by one stop. Electric contacts are also incorporated into the adapter's design and maintain full communication between the camera and lens, as well as support metadata transmission and use of Dual Pixel AF with select Canon EF lenses. Also, the adapter has been specifically designed for the EOS C70 cinema camera and features four screws and a split locking collar to ensure a secure attachment.

Lens Compatibility
This adapter physically supports working with any Canon EF-mount lens; however, select lenses can maintain full Dual Pixel autofocus support and metadata transmission between the lens and camera, including:
  • EF 16-35mm f/2.8L III USM
  • EF 24-70mm f/2.8L II USM
  • EF 24-105mm f/4L IS II USM
UPC: 013803335699

Canon 4757C001 Specs

Adapter
Camera MountCanon RF
Lens MountCanon EF
Magnification0.71x
Packaging Info
Package Weight0.98 lb
Box Dimensions (LxWxH)7.3 x 5.4 x 4.8"

Canon 4757C001 Reviews

Great, but not for superwide lenses

By Roderick
Rated 4 out of 5
Date: 2022-07-14

It's a great product to give you a wider shot. However, on 14mm lenses or wider, some vignetting will occur.

Love It!!

By Eric
Rated 5 out of 5
Date: 2022-02-23

This was a main selling point of my even buying the C70 in the first place! Works just as it should and highly recommend!

Good for field of view, but not as sharp.

By Ross
Rated 4 out of 5
Date: 2022-01-16

You lose sharpness and gain chromatic aberration in exchange for your wider field of view. I especially notice on my Sigma Art 50, which is ULTRA sharp on its own but just acceptable with this adapter. (Canon C70).

Better than I thought

By Jan
Rated 5 out of 5
Date: 2021-12-06

I use this adapter on my C 70 and I'm very very pleased with it. The gains in light are substantial. Also it affects the image so it makes it more artistic. Worth every penny.

no wiggle works great

By Lance
Rated 5 out of 5
Date: 2021-11-04

It stays on my C70, as if it's not even there. Which is what I wanted.

Works great!

By Eric
Rated 5 out of 5
Date: 2021-10-26

It's been working great with all of my lenses, no need to upgrade to RF glass since all my old ones get an extra stop of light now. Auto focus is still working great with this, no complaints.

Works great on RED Komodo

By Eric
Rated 5 out of 5
Date: 2022-05-27

Much better FOV and more light. Perfect fit.

Great product

By Clynton
Rated 4 out of 5
Date: 2022-04-25

Works great. Just beware of using a too wide lens cause you will experience some vignetting. Other than that it works great. Gives a wider field of view and lets in more light.

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When it says that it makes the lens a stop ...

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What are the three Canon EF lenses that receive ...

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Asked by: Anonymous
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Answered by: Nicholas
Date published: 2021-05-09

how does it work for a Sigma Art 20mm 1.4 on EOS ...

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Will this be compatible with the Komodo?

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