Canon EOS 20D Astrophotography vs Nikon D2Xs

This is a full comparison between the cameras Canon EOS 20D Astrophotography and Nikon D2Xs. We compare them by looking at the categories you see below.

Canon EOS 20D Astrophotography
Nikon D2Xs


Canon EOS 20D Astrophotography is manufacturered by Canon but Nikon D2Xs is from Nikon. Both Canon and Nikon are well known brands though.

Canon EOS 20D Astrophotography were released 2005 and Nikon D2Xs was released 2006. That is a 1 years difference. In tech, this period of time can be of interest since technology is always improving etc.

Camera Manufacturer Released
Canon EOS 20D Astrophotography Canon 2005
Nikon D2Xs Nikon 2006

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 20D Astrophotography has a "APSC"-sensor while Nikon D2Xs has a "DX"-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 20D Astrophotography 80 mm (a Canon APS-C sensor have a crop factor / focal length multiplier by * 1.6)
Nikon D2Xs 75 mm (a Nikon DX sensor have a crop factor / focal length multiplier by * 1.5)

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)


Canon EOS 20D Astrophotography has a 8,2 MP (Megapixels) resolution while Nikon D2Xs has 12,2 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 20D Astrophotography 8,2 MP 8185344 3504 2336
Nikon D2Xs 12,2 MP 12212224 4288 2848

Nikon D2Xs has a 49 % larger resolution than Canon EOS 20D Astrophotography. 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

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

Camera ISO Range
Canon EOS 20D Astrophotography 100-3200
Nikon D2Xs 100-3200

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.

Here is a complete overview of which lenses that work with each camera:
Lens compatibility chart for Canon EOS 20D Astrophotography
Lens compatibility chart for Nikon D2Xs

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definately be of interest. Canon EOS 20D Astrophotography can shoot up to 5 pictures per seconds and Nikon D2Xs can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 20D Astrophotography 5
Nikon D2Xs 5

Ability to record movies

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

Though, neither Canon EOS 20D Astrophotography or Nikon D2Xs can shoot movies so if that is a functionality that you are really looking for you should look elsewhere.


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 D2Xs weighs 1200 gr (equal to 2,65 lb) which is 56% heavier than Canon EOS 20D Astrophotography and its 770 gr (or 1,7 lb).

Camera Weight (in gram) Weight (in pounds)
Canon EOS 20D Astrophotography 770 gr 1,7 lb
Nikon D2Xs 1200 gr 2,65 lb