Canon EOS Rebel T7i vs Canon EOS 1D Mark III

This is a full comparison between the cameras Canon EOS Rebel T7i and Canon EOS 1D Mark III. We compare them by looking at the categories you see below.

Canon EOS Rebel T7i
Canon EOS 1D Mark III

Manufacturing

These cameras are both manufacturered by Canon.

Canon EOS Rebel T7i were released 2017 and Canon EOS 1D Mark III was released 2007. 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 Rebel T7i Canon 2017
Canon EOS 1D Mark III Canon 2007

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS Rebel T7i has a "APSC"-sensor while Canon EOS 1D Mark III has a "APSH"-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 Rebel T7i 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)
Canon EOS 1D Mark III 65 mm (a Canon APS-H sensor have a crop factor / focal length multiplier by * 1.3)

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Canon)

Resolution

Canon EOS Rebel T7i has a 24 MP (Megapixels) resolution while Canon EOS 1D Mark III has 10,1 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 Rebel T7i 24 MP 24000000 6000 4000
Canon EOS 1D Mark III 10,1 MP 10077696 3888 2592

Canon EOS Rebel T7i has a 138 % larger resolution than Canon EOS 1D Mark III. 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 Rebel T7i has a larger ISO-range than Canon EOS 1D Mark III. Canon EOS Rebel T7i has an ISO range that stretches from 100 to 25600 while Canon EOS 1D Mark III has 50 to 6400.

Camera ISO Range
Canon EOS Rebel T7i 100-25600
Canon EOS 1D Mark III 50-6400

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that supports autofocus, does not have a autofocus motor of their own but this wont cause any problems with these two cameras.

Here is a complete overview of which lenses that work with each camera:
Lens compatibility chart for Canon EOS Rebel T7i
Lens compatibility chart for Canon EOS 1D Mark III

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definately be of interest. Canon EOS Rebel T7i can shoot up to 6 pictures per seconds and Canon EOS 1D Mark III can shoot up to 10 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS Rebel T7i 6
Canon EOS 1D Mark III 10

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 Rebel T7i. Unfortunately Canon EOS 1D Mark III 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, carried around, for several hours at the time.

Canon EOS 1D Mark III weighs 1155 gr (equal to 2,55 lb) which is 117% heavier than Canon EOS Rebel T7i and its 532 gr (or 1,17 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS Rebel T7i 532 gr 1,17 lb
Canon EOS 1D Mark III 1155 gr 2,55 lb