Nikon Z6 II vs Canon EOS 20D Astrophotography

This is a full comparison between the cameras Nikon Z6 II and Canon EOS 20D Astrophotography. We compare them by looking at the categories you see below.


Nikon Z6 II is manufacturered by Nikon but Canon EOS 20D Astrophotography is from Canon. Both Nikon and Canon are well known brands though.

Nikon Z6 II were released 2020 and Canon EOS 20D Astrophotography was released 2005. That is a 15 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Nikon Z6 II 2020
Canon EOS 20D Astrophotography 2005

Type of camera

Nikon Z6 II is a Mirrorless camera while Canon EOS 20D Astrophotography is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Nikon Z6 II has a "FX"-sensor while Canon EOS 20D Astrophotography has a "APSC"-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 **
Nikon Z6 II 50 mm
Full-frame sensor
No crop factor/focal length multiplier
Canon EOS 20D Astrophotography 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 (Nikon)
Camera selection can affect the focal length (Canon)


Nikon Z6 II has a 25 MP (Megapixels) resolution while Canon EOS 20D Astrophotography has 8,2 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Nikon Z6 II 25 MP
24337152 pixels
6048 x 4024
Canon EOS 20D Astrophotography 8,2 MP
8185344 pixels
3504 x 2336

Nikon Z6 II has a 197 % 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, afterward while editing the pictures, if needed that is.

ISO range

Nikon Z6 II has a larger ISO-range than Canon EOS 20D Astrophotography. Nikon Z6 II has an ISO range that stretches from 100 to 51200 while Canon EOS 20D Astrophotography has 100 to 3200.

Camera ISO Range
Nikon Z6 II 100-51200
Canon EOS 20D Astrophotography 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 Nikon Z6 II
Lens compatibility chart for Canon EOS 20D Astrophotography

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Nikon Z6 II can shoot up to 14 pictures per seconds and Canon EOS 20D Astrophotography can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Nikon Z6 II 14
Canon EOS 20D Astrophotography 5

Ability to record movies

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

When comparing these two cameras there is only one of them that can shoot movies and that is Nikon Z6 II. Unfortunately Canon EOS 20D Astrophotography does not support recording movies and movie clips.


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 20D Astrophotography weighs 770 gr (equal to 1,7 lb) which is 9% heavier than Nikon Z6 II and its 705 gr (or 1,55 lb).

Camera Weight
Nikon Z6 II 705 gr
1,55 lb
Canon EOS 20D Astrophotography 770 gr
1,7 lb