Nikon D3s vs Canon EOS R

This is a full comparison between the cameras Nikon D3s and Canon EOS R. We compare them by looking at the categories you see below.

Nikon D3s

Canon EOS R

Manufacturing

Nikon D3s is manufacturered by Nikon but Canon EOS R is from Canon. Both Nikon and Canon are well known brands though.

Nikon D3s were released 2009 and Canon EOS R was released 2018. That is a 9 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Nikon D3s	2009
Canon EOS R	2018

Type of camera

Nikon D3s is a DSLR camera while Canon EOS R is a Mirrorless 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 **
Nikon D3s	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS R	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 (Nikon)
Camera selection can affect the focal length (Canon)

Resolution

Nikon D3s has a 12,1 MP (Megapixels) resolution while Canon EOS R has 30 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Nikon D3s	12,1 MP 12052992 pixels 4256 x 2832
Canon EOS R	30 MP 30105600 pixels 6720 x 4480

Canon EOS R has a 150 % larger resolution than Nikon D3s. 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

Nikon D3s has a larger ISO-range than Canon EOS R. Nikon D3s has an ISO range that stretches from 200 to 102400 while Canon EOS R has 100 to 40000.

Camera	ISO Range
Nikon D3s	200-102400
Canon EOS R	100-40000

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 R 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 Nikon D3s
Lens compatibility chart for Canon EOS R

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Nikon D3s can shoot up to 11 pictures per seconds and Canon EOS R can shoot up to 8 pictures per seconds.

Camera	FPS (Frames per second)
Nikon D3s	11
Canon EOS R	8

Ability to record movies

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

In this case, both Nikon D3s and Canon EOS R 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.

Nikon D3s weighs 1240 gr (equal to 2.73 lb) which is 88% heavier than Canon EOS R and its 660 gr (or 1.46 lb).

Camera	Weight
Nikon D3s	1240 gr 2.73 lb
Canon EOS R	660 gr 1.46 lb