Sony a9 III vs Canon EOS R5

This is a full comparison between the cameras Sony a9 III and Canon EOS R5. We compare them by looking at the categories you see below.

Sony a9 III

Canon EOS R5

Manufacturing

Sony a9 III is manufacturered by Sony but Canon EOS R5 is from Canon. Both Sony and Canon are well known brands though.

Sony a9 III were released 2023 and Canon EOS R5 was released 2020. That is a 3 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a9 III	2023
Canon EOS R5	2020

Type of camera

Both these cameras are Mirrorless cameras. No difference there.

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 a9 III	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS R5	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 a9 III has a 25,2 MP (Megapixels) resolution while Canon EOS R5 has 45 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a9 III	25,2 MP 24000000 pixels 6000 x 4000
Canon EOS R5	45 MP 44761088 pixels 8192 x 5464

Canon EOS R5 has a 87 % larger resolution than Sony a9 III. 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

Canon EOS R5 has a larger ISO-range than Sony a9 III. Canon EOS R5 has an ISO range that stretches from 100 to 51200 while Sony a9 III has 125 to 51200.

Camera	ISO Range
Sony a9 III	125-51200
Canon EOS R5	100-51200

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.

Worth mentioning is that Canon EOS R5 belongs to the Canon EOS R-system and needs an adapter to work with Canons EF, EF-S, MP-E, and TS-E lenses. You can read more about this adapter here:
Canon Lens Mount Adapter EF-EOS R

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a9 III
Lens compatibility chart for Canon EOS R5

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a9 III can shoot up to 120 pictures per seconds and Canon EOS R5 can shoot up to 20 pictures per seconds.

Camera	FPS (Frames per second)
Sony a9 III	120
Canon EOS R5	20

Ability to record movies

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

In this case, both Sony a9 III and Canon EOS R5 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 R5 weighs 738 gr (equal to 1.63 lb) which is 20% heavier than Sony a9 III and its 617 gr (or 1.36 lb).

Camera	Weight
Sony a9 III	617 gr 1.36 lb
Canon EOS R5	738 gr 1.63 lb