Sony a7R IIIA vs Canon EOS 5DS R

This is a full comparison between the cameras Sony a7R IIIA and Canon EOS 5DS R. We compare them by looking at the categories you see below.

Sony a7R IIIA

Canon EOS 5DS R

Manufacturing

Sony a7R IIIA is manufacturered by Sony but Canon EOS 5DS R is from Canon. Both Sony and Canon are well known brands though.

Sony a7R IIIA were released 2021 and Canon EOS 5DS R was released 2015. That is a 6 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R IIIA	2021
Canon EOS 5DS R	2015

Type of camera

Sony a7R IIIA is a Mirrorless camera while Canon EOS 5DS R is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

Even though the camera sensors might be called differently they are both considered Full frame which means that the focal length of the lenses is not affected. There is no crop factor on any of these cameras and sensors.

Camera	Focal length, 50mm f/1.8 **
Sony a7R IIIA	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS 5DS R	50 mm Full-frame sensor No crop factor/focal length multiplier

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Sony)
Camera selection can affect the focal length (Canon)

Resolution

Sony a7R IIIA has a 42 MP (Megapixels) resolution while Canon EOS 5DS R has 51 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R IIIA	42 MP 42177408 pixels 7952 x 5304
Canon EOS 5DS R	51 MP 50320896 pixels 8688 x 5792

Canon EOS 5DS R has a 19 % larger resolution than Sony a7R IIIA. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Sony a7R IIIA has a larger ISO-range than Canon EOS 5DS R. Sony a7R IIIA has an ISO range that stretches from 100 to 32000 while Canon EOS 5DS R has 100 to 6400.

Camera	ISO Range
Sony a7R IIIA	100-32000
Canon EOS 5DS R	100-6400

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a7R IIIA
Lens compatibility chart for Canon EOS 5DS R

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R IIIA can shoot up to 10 pictures per seconds and Canon EOS 5DS R can shoot up to 5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R IIIA	10
Canon EOS 5DS R	5

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

In this case, both Sony a7R IIIA and Canon EOS 5DS R can shoot movies.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Canon EOS 5DS R weighs 930 gr (equal to 2.05 lb) which is 42% heavier than Sony a7R IIIA and its 657 gr (or 1.45 lb).

Camera	Weight
Sony a7R IIIA	657 gr 1.45 lb
Canon EOS 5DS R	930 gr 2.05 lb