Canon EOS R Vs Sony Alpha A7 Mark III - How Do They Compare?

The Canon EOS R and the Sony Alpha A7 Mark III are both new full-frame mirrorless cameras but when you sit them next to each other, how do they compare? To find out, we've compared the specs of each camera side-by-side to see how they face-off. 

We've also compared the Canon EOS R with the new Nikon Z6, too. 

Camera Body Weight, Size & Design 

There's only a 10g weight difference between the Canon EOS R (660g) and the Sony Alpha A7 Mark III (650g) and they're quite similar in size, too. Although, the Alpha A7 Mark III does have a much more box-style body than the Canon EOS R which has a few more curves to it. 

Image Sensor & Resolution

A 30Mp CMOS sensor can be found in the Canon EOS R while inside the Sony Alpha A7 Mark III is a 24MP back-lit CMOS sensor. 

ISO Range

The ISO range of both cameras starts at ISO50 but the Sony Alpha A7 Mark III offers a slightly bigger ISO range overall reaching 204800 compared with the Canon EOS R's max ISO of 102400. You can take a look at the below ISO images to decide for yourself how well, you think, each camera performs. Once we've written our full review of the Canon EOS R, we'll be able to compare the shooting capabilities of both cameras in more detail. 

Canon EOS R ISO

Sony Alpha 7 III ISO test images

Continuous Shooting

If the frames per second you can shoot at is important to you then the Sony Alpha A7 Mark III may be the camera for you as it offers 10fps compared with the Canon EOS R's 8fps. Although, an extra 2fps isn't a massive difference. 

Screen & Electronic Viewfinder

The viewfinder on the Canon EOS R offers a better resolution than the one found on the Sony Alpha A7 Mark III and the LCD monitor also offers a better resolution, too. Although they both measure 3-inch and are touch-sensitive. 

Video

As you'd expect from modern cameras, both offer 4K video recording along with FullHD and various other options. Both cameras also record in stereo sound.

Image Quality

Here you'll find a range of full-size sample photos, taken with the Canon EOS R and Sony Alpha A7 Mark III so you can decide for yourself how well, you think, each camera performs. As we said when commenting on the ISO ranges of each camera, when we've written our full review of the Canon EOS R, we'll be able to compare the shooting capabilities of both cameras in more detail. 

Canon EOS R Other sample images

Sony Alpha 7 III Other sample images

Battery 

The Sony Alpha A7 Mark III can, almost, capture double the number of shots the Canon EOS R can on one charge. The official CIPA rating for each camera is as follows: Sony - 710, Canon - 370. 

Price

You'll be able to purchase the Canon EOS R, with a mount adapter, for £2,349.99 which is £149.99 more than the Sony Alpha A7 Mark III was first available for (£2200 body only). Over on Amazon UK, the Sony Alpha A7 Mark III is currently priced at just under £2K (at the time of writing). 

You can compare more of the specs in the table below.