Canon EOS R3 vs Canon EOS M100

This is a full comparison between the cameras Canon EOS R3 and Canon EOS M100. We compare them by looking at the categories you see below.

Canon EOS R3

Canon EOS M100

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS R3 were released 2021 and Canon EOS M100 was released 2017. That is a 4 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS R3	2021
Canon EOS M100	2017

Type of camera

Both these cameras are Mirrorless cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS R3 has a "Canon Full Frame"-sensor while Canon EOS M100 has a "Canon APS-C"-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
Canon EOS M100	80 mm Canon APS-C sensor Crop factor/focal length multiplier by * 1.6

** 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)

Resolution

Both these cameras have the exact same resolution. Canon EOS R3 has a 24 MP (Megapixels) resolution while Canon EOS M100 has 24 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
Canon EOS M100	24 MP 24000000 pixels 6000 x 4000

ISO range

Canon EOS R3 has a larger ISO-range than Canon EOS M100. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Canon EOS M100 has 100 to 25600.

Camera	ISO Range
Canon EOS R3	100-102400
Canon EOS M100	100-25600

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

Worth mentioning is that Canon EOS M100 belongs to the Canon EOS M-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 M

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Canon EOS R3
Lens compatibility chart for Canon EOS M100

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 Canon EOS M100 can shoot up to 6,1 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS R3	30
Canon EOS M100	6,1

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 Canon EOS M100 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 R3 weighs 1015 gr (equal to 2.24 lb) which is 236% heavier than Canon EOS M100 and its 302 gr (or 0.67 lb).

Camera	Weight
Canon EOS R3	1015 gr 2.24 lb
Canon EOS M100	302 gr 0.67 lb