Canon EOS R3 vs Nikon D5100

This is a full comparison between the cameras Canon EOS R3 and Nikon D5100. We compare them by looking at the categories you see below.

Canon EOS R3
Nikon D5100

Manufacturing

Canon EOS R3 is manufacturered by Canon but Nikon D5100 is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS R3 were released 2021 and Nikon D5100 was released 2011. That is a 10 years difference. In tech, this period of time can be of interest since technology is always improving etc.

Camera Manufacturer Released
Canon EOS R3 Canon 2021
Nikon D5100 Nikon 2011

Type of camera

Canon EOS R3 is a Mirrorless camera while Nikon D5100 is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Canon EOS R3 has a "FF"-sensor while Nikon D5100 has a "DX"-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 R3 50 mm (a fullframe sensor does not have a crop factor / focal length multiplier)
Nikon D5100 75 mm (a Nikon DX sensor have a crop factor / focal length multiplier by * 1.5)

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 R3 has a 24 MP (Megapixels) resolution while Nikon D5100 has 16,2 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 R3 24 MP 24000000 6000 4000
Nikon D5100 16,2 MP 16084992 4928 3264

Canon EOS R3 has a 49 % larger resolution than Nikon D5100. 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 R3 has a larger ISO-range than Nikon D5100. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Nikon D5100 has 100 to 6400.

Camera ISO Range
Canon EOS R3 100-102400
Nikon D5100 100-6400

Autofocus and lens compatibility

There is a big diffence between these two cameras. Canon EOS R3 has a built-in autofocus motor but Nikon D5100 does not. If you want to be able to use autofocus on Nikon D5100 there is a need for having an autofocus motor inside the lens. We really encourage you to look closely at our lens compatibility charts at the links below.

Worth mentioning is that Canon EOS R3 belong to the Canon EOS R-system and need an adapter to work with Canons EF, EF-S, MP-E and TS-E lenses. You can read more about this adapter here:
Read more about Canon Lens Mount Adapter EF-EOS R

Here is a complete overview of which lenses that work with each camera:
Lens compatibility chart for Canon EOS R3
Lens compatibility chart for Nikon D5100

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definately be of interest. Canon EOS R3 can shoot up to 30 pictures per seconds and Nikon D5100 can shoot up to 4 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS R3 30
Nikon D5100 4

Ability to record movies

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

In this case, both Canon EOS R3 and Nikon D5100 can shoot movies.

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 R3 weighs 1015 gr (equal to 2,24 lb) which is 66% heavier than Nikon D5100 and its 611 gr (or 1,35 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS R3 1015 gr 2,24 lb
Nikon D5100 611 gr 1,35 lb