Canon EOS 1D X Mark III vs Nikon D300s

This is a full comparison between the cameras Canon EOS 1D X Mark III and Nikon D300s. We compare them by looking at the categories you see below.

Canon EOS 1D X Mark III

Nikon D300s

Manufacturing

Canon EOS 1D X Mark III is manufacturered by Canon but Nikon D300s is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS 1D X Mark III were released 2020 and Nikon D300s was released 2009. That is a 11 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS 1D X Mark III	2020
Nikon D300s	2009

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 1D X Mark III has a "Canon Full Frame"-sensor while Nikon D300s has a "Nikon DX"-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 **
Canon EOS 1D X Mark III	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D300s	75 mm Nikon DX sensor Crop factor/focal length multiplier by * 1.5

** 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 (Canon)
Camera selection can affect the focal length (Nikon)

Resolution

Canon EOS 1D X Mark III has a 20 MP (Megapixels) resolution while Nikon D300s has 12,3 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Canon EOS 1D X Mark III	20 MP 19961856 pixels 5472 x 3648
Nikon D300s	12,3 MP 12212224 pixels 4288 x 2848

Canon EOS 1D X Mark III has a 63 % larger resolution than Nikon D300s. 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 X Mark III has a larger ISO-range than Nikon D300s. Canon EOS 1D X Mark III has an ISO range that stretches from 100 to 102400 while Nikon D300s has 200 to 6400.

Camera	ISO Range
Canon EOS 1D X Mark III	100-102400
Nikon D300s	200-6400

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 Canon EOS 1D X Mark III
Lens compatibility chart for Nikon D300s

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Canon EOS 1D X Mark III can shoot up to 20 pictures per seconds and Nikon D300s can shoot up to 7 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS 1D X Mark III	20
Nikon D300s	7

Ability to record movies

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

In this case, both Canon EOS 1D X Mark III and Nikon D300s 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 X Mark III weighs 1440 gr (equal to 3.17 lb) which is 54% heavier than Nikon D300s and its 938 gr (or 2.07 lb).

Camera	Weight
Canon EOS 1D X Mark III	1440 gr 3.17 lb
Nikon D300s	938 gr 2.07 lb