Canon EOS 40D vs Canon EOS Rebel T3i

This is a full comparison between the cameras Canon EOS 40D and Canon EOS Rebel T3i. We compare them by looking at the categories you see below.

Canon EOS 40D
Canon EOS Rebel T3i

Manufacturing

These cameras are both manufacturered by Canon.

Canon EOS 40D were released 2007 and Canon EOS Rebel T3i was released 2011. That is a 4 years difference. In tech, this period of time can be of interest since technology is always improving etc.

Camera Manufacturer Released
Canon EOS 40D Canon 2007
Canon EOS Rebel T3i Canon 2011

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

Both these cameras have the same sorts sensor (called "APSC") which means that if you compare the cameras side by side the lenses will also have the same experienced focal length. Neither of the cameras have a Full frame sensor which means that you will get a "crop factor" where the cameras sensor size effect the focal length with a multiplier.

Camera Experienced focal length when using a lens with 50mm focal length (ex a common "50mm f/1.8")
Canon EOS 40D 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)
Canon EOS Rebel T3i 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)

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

Resolution

Canon EOS 40D has a 10,1 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 Pixel (total) Pixels (width) Pixels (height)
Canon EOS 40D 10,1 MP 10077696 3888 2592
Canon EOS Rebel T3i 18 MP 17915904 5184 3456

Canon EOS Rebel T3i has a 78 % larger resolution than Canon EOS 40D. 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 T3i has a larger ISO-range than Canon EOS 40D. Canon EOS Rebel T3i has an ISO range that stretches from 100 to 12800 while Canon EOS 40D has 100 to 3200.

Camera ISO Range
Canon EOS 40D 100-3200
Canon EOS Rebel T3i 100-12800

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.

Lens compatibility chart for Canon EOS 40D
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 definately be of interest. Canon EOS 40D can shoot up to 6,5 pictures per seconds and Canon EOS Rebel T3i can shoot up to 3,7 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 40D 6,5
Canon EOS Rebel T3i 3,7

Ability to record movies

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

It is only one of these two cameras that support recording of movies and movie clips and that is Canon EOS Rebel T3i. Sadly, the Canon EOS 40D does not support this.

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 40D weighs 822 gr (equal to 1,81 lb) which is 44% heavier than Canon EOS Rebel T3i and its 570 gr (or 1,26 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS 40D 822 gr 1,81 lb
Canon EOS Rebel T3i 570 gr 1,26 lb