DIY Photography

Your one stop shop for everything photo-video

  • News
  • Inspiration
  • Reviews
  • Tutorials
  • DIY
  • Gear
Search

Submit A Story

Metabones has released a Canon EF to RF speed booster to reduce the EOS R 4K crop factor

Mar 28, 2020 by John Aldred 2 Comments

  • Share
  • Tweet
  • Flipboard
  • WhatsApp

It might seem strange to produce a speed booster that converts full-frame lenses to full-frame. But with the Canon EOS R and EOS RP mirrorless cameras, when you’re shooting 4K video, you’re not exactly using the entire full-frame view of the sensor. The Canon EOS R has about a 1.75x crop factor, and the EOS RP has a 1.64x crop factor (similar to APS-C).

The new Metabones EF-RF Speed Booster ULTRA 0.71x, however, helps to reverse this problem. It widens the view when EF lenses are used on the EOS R and EOS RP to 1.24x and 1.15x respectively when shooting 4K video.

Unlike many other speed boosters, such as those for Canon EF to Sony APS-C E Mount and Micro Four Thirds mounts, these aren’t designed for shooting stills. With both the EOS R and EOS RP, when you’re using full-frame Canon EF lenses with the standard EF to RF adapter, you see the full-frame field of view. But when shooting video, you do not. And that’s specifically what this adapter is intended for.

As well as widening the field of view, you also gain about a stop of light coming in through the lens, as the wider field of view is now packed down into a smaller area of the sensor. Its optical makeup comprises 5 elements in 4 groups and supports autofocus, dual-pixel autofocus and video autofocus.

Although you’re still not quite seeing the entire full-frame field of view, it’s certainly much wider than it would otherwise be – even with native RF mount lenses, which also crop down when shooting 4K. Metabones says it adjusts the focal length and aperture in the EXIF data, too – although there are some exceptions with faster than f/1.4 lenses (see Note 3 on the product page).

As well as autofocus and EXIF adjustments, you also get support for Image Stabilisation, and there’s a built-in multifunction control wheel for adjusting ISO, shutter speed, aperture control or depth of field preview and an LED indicator to show communication status. Inside it’s flocked to reduce internal reflection, and the Arca Swiss, Markins and Photo Clam compatible tripod foot is removable.

A full list of compatibility, and specifically unsupported features – like FullHD video – which isn’t cropped, APS-C lenses, lens correction profiles, stacked M42 adapters, etc.

This would’ve been an awesome product a year ago. But now? I’m not so sure. With the EOS R5 on the way, and possibly a 6D-like EOS R6, the former of which will utilise the entire sensor for 4K and higher resolution video and the latter expected to offer full-frame 4K, is this adapter quickly going to become a redundant product?

The Metabones EF-RF Speed Booster ULTRA 0.71x is available to buy now for $479.

[via DPReview]

FIND THIS INTERESTING? SHARE IT WITH YOUR FRIENDS!

  • Share
  • Tweet
  • Flipboard
  • WhatsApp

Related posts:

Canon has released a 0.71x EF to RF speed booster adapter Metabones has announced a new set of Speed Boosters specifically for the Blackmagic Pocket 4K This handy Crop Factor Calculator shows how your lens will look on different size sensors Dispelling myths on sensor size, crop factor, and depth of field

Filed Under: news Tagged With: EF Mount, lens adapter, metabones, RF Mount, speedbooster

John Aldred: from diyphotography.net

About John Aldred

John Aldred is a photographer with over 20 years of experience in the portrait and commercial worlds. He is based in Scotland and has been an early adopter - and occasional beta tester - of almost every digital imaging technology in that time. As well as his creative visual work, John uses 3D printing, electronics and programming to create his own photography and filmmaking tools and consults for a number of brands across the industry.

« Photographer creates goofy and emotional portraits of his friends in quarantine
How to shoot and stitch a Milky Way panorama in Lightroom »

Submit A Story

Get our FREE Lighting Book

DIYP lighting book cover

* download requires newsletter signup

Recent Comments

Free Resources

Advanced lighting book

Learn photography

Recent Posts

  • iPhone 15 Pro Max: First impressions
  • Blackmagic’s new app turns your iPhone into a cinema camera (kinda)
  • Nikon announces Zf shortage (Surprise!)
  • Finally! Sennheiser EW-DP SKP plug-on transmitter offers 32-bit float recording
  • Photographing an abandoned Italian villa: A time capsule of history and mystery

Udi Tirosh: from diyphotography.netUdi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

Alex Baker: from diyphotography.netAlex Baker is a portrait and lifestyle driven photographer based in Valencia, Spain. She works on a range of projects from commercial to fine art and has had work featured in publications such as The Daily Mail, Conde Nast Traveller and El Mundo, and has exhibited work across Europe

David Williams: from diyphotography.netDave Williams is an accomplished travel photographer, writer, and best-selling author from the UK. He is also a photography educator and published Aurora expert. Dave has traveled extensively in recent years, capturing stunning images from around the world in a modified van. His work has been featured in various publications and he has worked with notable brands such as Skoda, EE, Boeing, Huawei, Microsoft, BMW, Conde Nast, Electronic Arts, Discovery, BBC, The Guardian, ESPN, NBC, and many others.

John Aldred: from diyphotography.netJohn Aldred is a photographer with over 20 years of experience in the portrait and commercial worlds. He is based in Scotland and has been an early adopter - and occasional beta tester - of almost every digital imaging technology in that time. As well as his creative visual work, John uses 3D printing, electronics and programming to create his own photography and filmmaking tools and consults for a number of brands across the industry.

Dunja Djudjic: from diyphotography.netDunja Djudjic is a multi-talented artist based in Novi Sad, Serbia. With 15 years of experience as a photographer, she specializes in capturing the beauty of nature, travel, and fine art. In addition to her photography, Dunja also expresses her creativity through writing, embroidery, and jewelry making.

Copyright © DIYPhotography 2006 - 2023 | About | Contact | Advertise | Write for DIYP | Full Disclosure | Privacy Policy