Using the Canon EOS-R as a Medium Format Camera

By gunpowdervideo Mar 3, 2019 / 13 Comments

The Kipon Baveyes Medium Format Focal Reducer lets me use my lovely Mamiya645 lenses on my Canon EOS-R. And it also reduces the crop factor from x1 to x0.7, giving me the full Medium Format Experience.

Kipon Baveyes Medium Format Review

Medium Format on a Budget!

The Kipon adapter lets you shoot a x0.7 crop of medium format lenses on pretty much any mirrorless full frame camera. Its available for Sony-E, Canon-RF, Nikon-Z, Fuji-GF and Leica-SL. The later meaning that it will work also on the Panasonic S1 and the upcoming offerings from Sigma.

You can find the Mamiya645 versions of adapter here:
Mamiya 645 – Canon EOS-R
Mamiya 645 – Nikon Z6/7
Mamiya 645 – Sony E
Mamiya 645 – Leica SL (Panasonic/Sigma L)

The Kipon Baveyes comes in a nice looking box.
The heft and tripod foot contributes to a well balanced kit.
Being able to use it on my EOS-R is a big step up from the A7 mainly because of the better screen, EVF and peaking. The higher resolution and video codec is just a bonus.

Canon Medium Format Samples

Just like the excellent build quality the image doesn’t disappoint .

Canon EOS-R + Kipon Baveyes + Mamiya 55mm f2.8
Rendering in the dark is just as lovley.
The 80mm f1.9 is still a bit of a favorite.
The 150mm f3.5 is both sharp and affordable.

Medium Format Sony A7

In case you missed it, here is the review I made of the Sony version.

This review will be evolving as time moves on with more info and samples.


  • Ralf Matz

    A few month ago I purchased the Kipon Baveyes medium format adapter (Leica M mount) along with some Pentax 67 lenses. So it is easy for me to switch for example from Sony A to Canon RF or Nikon Z or Panasonic with Leica L mount. I appreciate the image quality of this adapter.

    • Mattias Burling

      That’s probably the smartest way to do it. Mamiya 645-Leica M gives you maximum camera and lens compatibility.

      • Alpicat

        I’m wondering where you can get the Mamiya 645-Leica M focal reducer? I haven’t been able to find that specific combination yet. All the other combinations seem to be available but not this one unfortunately.

        • Mattias Burling

          I’ve seen them on eBay from time to time.

          • Alpicat

            Thanks, I’ll keep looking it out for it! For now all the other mount combinations are available on ebay but not this specific one.

    • Kaiyan Tsang

      How well does does your adapters inter-connect? Any play between the adapters?

      • Mattias Burling

        Mine is very firm.

        • Kaiyan Tsang

          Thanks. That is good news.

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  • Nick Lam

    What are the exact models of the lenses you used with this adapter?

    • Mattias Burling

      Mamiya 645 55mm, 80mm and 150mm.

  • MB

    Strange question here, how different do you think the glass element in the speedbooster is between this and a aps-c to fullframe speedbooster element, could it be the same? I want to hard convert my Mamiya 645 to EF mount for a filmmaking kit and then use EF speedboosters instead, what do you think?