Canon EOS R3 vs Nikon D300

This is a full comparison between the cameras Canon EOS R3 and Nikon D300. We compare them by looking at the categories you see below.

Canon EOS R3

Nikon D300

Manufacturing

Canon EOS R3 is manufacturered by Canon but Nikon D300 is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS R3 were released 2021 and Nikon D300 was released 2006. That is a 15 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS R3	2021
Nikon D300	2006

Type of camera

Canon EOS R3 is a Mirrorless camera while Nikon D300 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 "Canon Full Frame"-sensor while Nikon D300 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 R3	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D300	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 R3 has a 24 MP (Megapixels) resolution while Nikon D300 has 12,3 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Canon EOS R3	24 MP 24000000 pixels 6000 x 4000
Nikon D300	12,3 MP 12212224 pixels 4288 x 2848

Canon EOS R3 has a 97 % larger resolution than Nikon D300. 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 R3 has a larger ISO-range than Nikon D300. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Nikon D300 has 200 to 6400.

Camera	ISO Range
Canon EOS R3	100-102400
Nikon D300	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.

Worth mentioning is that Canon EOS R3 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 Canon EOS R3
Lens compatibility chart for Nikon D300

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Canon EOS R3 can shoot up to 30 pictures per seconds and Nikon D300 can shoot up to 6 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS R3	30
Nikon D300	6

Ability to record movies

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

When comparing these two cameras there is only one of them that can shoot movies and that is Canon EOS R3. Unfortunately Nikon D300 does not support recording movies and movie clips.

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 R3 weighs 1015 gr (equal to 2.24 lb) which is 10% heavier than Nikon D300 and its 925 gr (or 2.04 lb).

Camera	Weight
Canon EOS R3	1015 gr 2.24 lb
Nikon D300	925 gr 2.04 lb