Canon EOS 40D vs Nikon D3s

This is a full comparison between the cameras Canon EOS 40D and Nikon D3s. We compare them by looking at the categories you see below.

Canon EOS 40D
Nikon D3s

Manufacturing

Canon EOS 40D is manufacturered by Canon but Nikon D3s is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS 40D were released 2007 and Nikon D3s was released 2009. That is a 2 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
Nikon D3s Nikon 2009

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 40D has a "APSC"-sensor while Nikon D3s has a "FX"-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 40D 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)
Nikon D3s 50 mm (a fullframe sensor does not have a crop factor / focal length multiplier)

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

Resolution

Canon EOS 40D has a 10,1 MP (Megapixels) resolution while Nikon D3s has 12,1 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 40D 10,1 MP 10077696 3888 2592
Nikon D3s 12,1 MP 12052992 4256 2832

Nikon D3s has a 20 % 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

Nikon D3s has a larger ISO-range than Canon EOS 40D. Nikon D3s has an ISO range that stretches from 200 to 102400 while Canon EOS 40D has 100 to 3200.

Camera ISO Range
Canon EOS 40D 100-3200
Nikon D3s 200-102400

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 Nikon D3s

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 Nikon D3s can shoot up to 9-11 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 40D 6,5
Nikon D3s 9-11

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 Nikon D3s. 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.

Nikon D3s weighs 1240 gr (equal to 2,73 lb) which is 51% heavier than Canon EOS 40D and its 822 gr (or 1,81 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS 40D 822 gr 1,81 lb
Nikon D3s 1240 gr 2,73 lb