Canon EOS 1D vs Canon EOS 40D

This is a full comparison between the cameras Canon EOS 1D and Canon EOS 40D. We compare them by looking at the categories you see below.

Canon EOS 1D

Canon EOS 40D

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS 1D were released 2001 and Canon EOS 40D was released 2007. That is a 6 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS 1D	2001
Canon EOS 40D	2007

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 1D has a "Canon APS-H"-sensor while Canon EOS 40D 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 1D	65 mm Canon APS-H sensor Crop factor/focal length multiplier by * 1.3
Canon EOS 40D	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 1D has a 4,1 MP (Megapixels) resolution while Canon EOS 40D has 10,1 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Canon EOS 1D	4,1 MP 4060672 pixels 2464 x 1648
Canon EOS 40D	10,1 MP 10077696 pixels 3888 x 2592

Canon EOS 40D has a 148 % larger resolution than Canon EOS 1D. 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

Both of these cameras offer the exact same ISO range. They both have 100 to 3200.

Camera	ISO Range
Canon EOS 1D	100-3200
Canon EOS 40D	100-3200

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 1D
Lens compatibility chart for Canon EOS 40D

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Canon EOS 1D can shoot up to 8 pictures per seconds and Canon EOS 40D can shoot up to 6,5 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS 1D	8
Canon EOS 40D	6,5

Ability to record movies

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

Though, neither Canon EOS 1D or Canon EOS 40D can shoot movies so if that is a functionality that you are really looking for you should look elsewhere.

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 1D weighs 1585 gr (equal to 3.49 lb) which is 93% heavier than Canon EOS 40D and its 822 gr (or 1.81 lb).

Camera	Weight
Canon EOS 1D	1585 gr 3.49 lb
Canon EOS 40D	822 gr 1.81 lb