Sony a7R IV vs Canon EOS 1Ds Mark III

This is a full comparison between the cameras Sony a7R IV and Canon EOS 1Ds Mark III. We compare them by looking at the categories you see below.

Sony a7R IV

Canon EOS 1Ds Mark III

Manufacturing

Sony a7R IV is manufacturered by Sony but Canon EOS 1Ds Mark III is from Canon. Both Sony and Canon are well known brands though.

Sony a7R IV were released 2019 and Canon EOS 1Ds Mark III was released 2007. That is a 12 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R IV	2019
Canon EOS 1Ds Mark III	2007

Type of camera

Sony a7R IV is a Mirrorless camera while Canon EOS 1Ds Mark III 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 IV	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS 1Ds Mark III	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 IV has a 61 MP (Megapixels) resolution while Canon EOS 1Ds Mark III has 21,1 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R IV	61 MP 60217344 pixels 9504 x 6336
Canon EOS 1Ds Mark III	21,1 MP 21026304 pixels 5616 x 3744

Sony a7R IV has a 186 % larger resolution than Canon EOS 1Ds Mark 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

Sony a7R IV has a larger ISO-range than Canon EOS 1Ds Mark III. Sony a7R IV has an ISO range that stretches from 100 to 32000 while Canon EOS 1Ds Mark III has 50 to 3200.

Camera	ISO Range
Sony a7R IV	100-32000
Canon EOS 1Ds Mark III	50-3200

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 IV
Lens compatibility chart for Canon EOS 1Ds Mark III

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R IV can shoot up to 10 pictures per seconds and Canon EOS 1Ds Mark III can shoot up to 5 pictures per seconds.

Camera	FPS (Frames per second)
Sony a7R IV	10
Canon EOS 1Ds Mark III	5

Ability to record movies

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

When comparing these two cameras there is only one of them that can shoot movies and that is Sony a7R IV. Unfortunately Canon EOS 1Ds Mark III does not support recording movies and movie clips.

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 1Ds Mark III weighs 1385 gr (equal to 3.05 lb) which is 108% heavier than Sony a7R IV and its 665 gr (or 1.47 lb).

Camera	Weight
Sony a7R IV	665 gr 1.47 lb
Canon EOS 1Ds Mark III	1385 gr 3.05 lb