Canon EOS 20D vs Canon EOS 7D

This is a full comparison between the cameras Canon EOS 20D and Canon EOS 7D. We compare them by looking at the categories you see below.

Canon EOS 20D

Canon EOS 7D

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS 20D were released 2004 and Canon EOS 7D was released 2009. That is a 5 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS 20D	2004
Canon EOS 7D	2009

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

Both these cameras have the same sorts of sensor (called "Canon APS-C") which means that if you compare these cameras side by side the lenses will also have the same experienced focal length. Neither of the cameras has a Full frame sensor which means that you will get a "crop factor" where the camera's sensor size affect the focal length with a multiplier.

Camera	Focal length, 50mm f/1.8 **
Canon EOS 20D	80 mm Canon APS-C sensor Crop factor/focal length multiplier by * 1.6
Canon EOS 7D	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 20D has a 8,2 MP (Megapixels) resolution while Canon EOS 7D has 18 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Canon EOS 20D	8,2 MP 8185344 pixels 3504 x 2336
Canon EOS 7D	18 MP 17915904 pixels 5184 x 3456

Canon EOS 7D has a 119 % larger resolution than Canon EOS 20D. 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 7D has a larger ISO-range than Canon EOS 20D. Canon EOS 7D has an ISO range that stretches from 100 to 12800 while Canon EOS 20D has 100 to 3200.

Camera	ISO Range
Canon EOS 20D	100-3200
Canon EOS 7D	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.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Canon EOS 20D
Lens compatibility chart for Canon EOS 7D

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Canon EOS 20D can shoot up to 5 pictures per seconds and Canon EOS 7D can shoot up to 8 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS 20D	5
Canon EOS 7D	8

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 movies and movie clips and that is Canon EOS 7D. Sadly, the Canon EOS 20D 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, or carried around, for several hours at a time.

Canon EOS 7D weighs 860 gr (equal to 1.9 lb) which is 12% heavier than Canon EOS 20D and its 770 gr (or 1.7 lb).

Camera	Weight
Canon EOS 20D	770 gr 1.7 lb
Canon EOS 7D	860 gr 1.9 lb