Canon EOS 40D vs Canon EOS 1D X Mark III

This is a full comparison between the cameras Canon EOS 40D and Canon EOS 1D X Mark III. We compare them by looking at the categories you see below.

Canon EOS 40D
Canon EOS 1D X Mark III

Manufacturing

These cameras are both manufacturered by Canon.

Canon EOS 40D were released 2007 and Canon EOS 1D X Mark III was released 2020. That is a 13 years difference. In tech, this period of time can be of interest since technology is always improving etc.

Camera Manufacturer Released
Canon EOS 40D Canon 2007
Canon EOS 1D X Mark III Canon 2020

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 40D has a "APSC"-sensor while Canon EOS 1D X Mark III has a "FF"-sensor, and their difference in sensors will also effect the crop factor and experience focal length. See the table below.

Camera Experienced focal length when using a lens with 50mm focal length (ex a common "50mm f/1.8")
Canon EOS 40D 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)
Canon EOS 1D X Mark III 50 mm (a fullframe sensor does not have a crop factor / focal length multiplier)

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

Resolution

Canon EOS 40D has a 10,1 MP (Megapixels) resolution while Canon EOS 1D X Mark III has 20 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels Pixel (total) Pixels (width) Pixels (height)
Canon EOS 40D 10,1 MP 10077696 3888 2592
Canon EOS 1D X Mark III 20 MP 19961856 5472 3648

Canon EOS 1D X Mark III has a 98 % larger resolution than Canon EOS 40D. This could give you more details in the picture but also a possibility to crop more in the pictures, afterwards while editing the pictures, if needed that is.

ISO range

Canon EOS 1D X Mark III has a larger ISO-range than Canon EOS 40D. Canon EOS 1D X Mark III has an ISO range that stretches from 100 to 102400 while Canon EOS 40D has 100 to 3200.

Camera ISO Range
Canon EOS 40D 100-3200
Canon EOS 1D X Mark III 100-102400

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that supports autofocus, does not have a autofocus motor of their own but this wont cause any problems with these two cameras.

Lens compatibility chart for Canon EOS 40D
Lens compatibility chart for Canon EOS 1D X Mark III

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definately be of interest. Canon EOS 40D can shoot up to 6,5 pictures per seconds and Canon EOS 1D X Mark III can shoot up to 20 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 40D 6,5
Canon EOS 1D X Mark III 20

Ability to record movies

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

It is only one of these two cameras that support recording of movies and movie clips and that is Canon EOS 1D X Mark III. Sadly, the Canon EOS 40D does not support this.

Weight

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

Canon EOS 1D X Mark III weighs 1440 gr (equal to 3,17 lb) which is 75% heavier than Canon EOS 40D and its 822 gr (or 1,81 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS 40D 822 gr 1,81 lb
Canon EOS 1D X Mark III 1440 gr 3,17 lb