Canon EOS 1D Mark IIn vs Canon EOS 1D Mark III

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

Canon EOS 1D Mark IIn

Canon EOS 1D Mark III

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS 1D Mark IIn were released 2005 and Canon EOS 1D Mark III was released 2007. That is a 2 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Canon EOS 1D Mark IIn	2005
Canon EOS 1D Mark III	2007

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-H") 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 1D Mark IIn	65 mm Canon APS-H sensor Crop factor/focal length multiplier by * 1.3
Canon EOS 1D Mark III	65 mm Canon APS-H sensor Crop factor/focal length multiplier by * 1.3

** 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 Mark IIn has a 8,2 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
Canon EOS 1D Mark IIn	8,2 MP 8185344 pixels 3504 x 2336
Canon EOS 1D Mark III	10,1 MP 10077696 pixels 3888 x 2592

Canon EOS 1D Mark III has a 23 % larger resolution than Canon EOS 1D Mark IIn. 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 1D Mark III has a larger ISO-range than Canon EOS 1D Mark IIn. Canon EOS 1D Mark III has an ISO range that stretches from 50 to 6400 while Canon EOS 1D Mark IIn has 50 to 3200.

Camera	ISO Range
Canon EOS 1D Mark IIn	50-3200
Canon EOS 1D Mark III	50-6400

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 Mark IIn
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 definitely be of interest. Canon EOS 1D Mark IIn can shoot up to 8,5 pictures per seconds and Canon EOS 1D Mark III can shoot up to 10 pictures per seconds.

Camera	FPS (Frames per second)
Canon EOS 1D Mark IIn	8,5
Canon EOS 1D Mark III	10

Ability to record movies

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

Though, neither Canon EOS 1D Mark IIn or Canon EOS 1D Mark III 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 Mark IIn weighs 1565 gr (equal to 3.45 lb) which is 35% heavier than Canon EOS 1D Mark III and its 1155 gr (or 2.55 lb).

Camera	Weight
Canon EOS 1D Mark IIn	1565 gr 3.45 lb
Canon EOS 1D Mark III	1155 gr 2.55 lb