Sony a7R III vs Canon EOS 1D Mark IV

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

Sony a7R III

Canon EOS 1D Mark IV

Manufacturing

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

Sony a7R III were released 2017 and Canon EOS 1D Mark IV was released 2009. That is a 8 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Sony a7R III	2017
Canon EOS 1D Mark IV	2009

Type of camera

Sony a7R III is a Mirrorless camera while Canon EOS 1D Mark IV is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Sony a7R III has a "Sony Full Frame"-sensor while Canon EOS 1D Mark IV has a "Canon APS-H"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

Camera	Focal length, 50mm f/1.8 **
Sony a7R III	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS 1D Mark IV	65 mm Canon APS-H sensor Crop factor/focal length multiplier by * 1.3

** 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 III has a 42 MP (Megapixels) resolution while Canon EOS 1D Mark IV has 16,1 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Sony a7R III	42 MP 42177408 pixels 7952 x 5304
Canon EOS 1D Mark IV	16,1 MP 15980544 pixels 4896 x 3264

Sony a7R III has a 164 % larger resolution than Canon EOS 1D Mark IV. 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 1D Mark IV has a larger ISO-range than Sony a7R III. Canon EOS 1D Mark IV has an ISO range that stretches from 50 to 102400 while Sony a7R III has 100 to 32000.

Camera	ISO Range
Sony a7R III	100-32000
Canon EOS 1D Mark IV	50-102400

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 III
Lens compatibility chart for Canon EOS 1D Mark IV

Pictures per second

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

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

Ability to record movies

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

In this case, both Sony a7R III and Canon EOS 1D Mark IV 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 1D Mark IV weighs 1230 gr (equal to 2.71 lb) which is 87% heavier than Sony a7R III and its 657 gr (or 1.45 lb).

Camera	Weight
Sony a7R III	657 gr 1.45 lb
Canon EOS 1D Mark IV	1230 gr 2.71 lb