Canon EOS R8 vs Canon EOS Rebel T3i

This is a full comparison between the cameras Canon EOS R8 and Canon EOS Rebel T3i. We compare them by looking at the categories you see below.

Canon EOS R8

Canon EOS Rebel T3i

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS R8 were released 2023 and Canon EOS Rebel T3i was released 2011. That is a 12 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS R8	2023
Canon EOS Rebel T3i	2011

Type of camera

Canon EOS R8 is a Mirrorless camera while Canon EOS Rebel T3i is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Canon EOS R8 has a "Canon Full Frame"-sensor while Canon EOS Rebel T3i 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 R8	50 mm Full-frame sensor No crop factor/focal length multiplier
Canon EOS Rebel T3i	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

Canon EOS R8 has a 24 MP (Megapixels) resolution while Canon EOS Rebel T3i has 18 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Canon EOS R8	24 MP 24000000 pixels 6000 x 4000
Canon EOS Rebel T3i	18 MP 17915904 pixels 5184 x 3456

Canon EOS R8 has a 34 % larger resolution than Canon EOS Rebel T3i. 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 R8 has a larger ISO-range than Canon EOS Rebel T3i. Canon EOS R8 has an ISO range that stretches from 100 to 102400 while Canon EOS Rebel T3i has 100 to 12800.

Camera	ISO Range
Canon EOS R8	100-102400
Canon EOS Rebel T3i	100-12800

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 R8 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 R8
Lens compatibility chart for Canon EOS Rebel T3i

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Canon EOS R8 can shoot up to 6 pictures per seconds and Canon EOS Rebel T3i can shoot up to 3,7 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS R8	6
Canon EOS Rebel T3i	3,7

Ability to record movies

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

In this case, both Canon EOS R8 and Canon EOS Rebel T3i 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 Rebel T3i weighs 570 gr (equal to 1.26 lb) which is 24% heavier than Canon EOS R8 and its 461 gr (or 1.02 lb).

Camera	Weight
Canon EOS R8	461 gr 1.02 lb
Canon EOS Rebel T3i	570 gr 1.26 lb