Canon EOS 1D Mark IIn vs Canon EOS 20D Astrophotography

This is a full comparison between the cameras Canon EOS 1D Mark IIn and Canon EOS 20D Astrophotography. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Canon.

These two camera models were both released 2005.

Camera Released
Canon EOS 1D Mark IIn 2005
Canon EOS 20D Astrophotography 2005

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Canon EOS 1D Mark IIn has a "Canon APS-H"-sensor while Canon EOS 20D Astrophotography 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 Mark IIn 65 mm
Canon APS-H sensor
Crop factor/focal length multiplier by * 1.3
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 (Canon)

Resolution

Both these cameras have the exact same resolution. Canon EOS 1D Mark IIn has a 8,2 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
Canon EOS 1D Mark IIn 8,2 MP
8185344 pixels
3504 x 2336
Canon EOS 20D Astrophotography 8,2 MP
8185344 pixels
3504 x 2336

ISO range

Canon EOS 1D Mark IIn has a larger ISO-range than Canon EOS 20D Astrophotography. Canon EOS 1D Mark IIn has an ISO range that stretches from 50 to 3200 while Canon EOS 20D Astrophotography has 100 to 3200.

Camera ISO Range
Canon EOS 1D Mark IIn 50-3200
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 Canon EOS 1D Mark IIn
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. Canon EOS 1D Mark IIn can shoot up to 8,5 pictures per seconds and Canon EOS 20D Astrophotography can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS 1D Mark IIn 8,5
Canon EOS 20D Astrophotography 5

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 20D Astrophotography 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 103% heavier than Canon EOS 20D Astrophotography and its 770 gr (or 1.7 lb).

Camera Weight
Canon EOS 1D Mark IIn 1565 gr
3.45 lb
Canon EOS 20D Astrophotography 770 gr
1.7 lb

Canon EOS 1D Mark IIn vs Canon EOS 20D Astrophotography Specs

Below you will find the complete and detailed technical specs for both Canon EOS 1D Mark IIn and Canon EOS 20D Astrophotography, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Name Canon EOS 1D Mark IIn Canon EOS 20D Astrophotography
Manufacturer Canon Canon
Release Date and Price
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Release Year 2005 2005
Release Date 2005-08-22 2005-06-01
MSRP 3999 USD 1499 USD
Buy it today
Camera Type
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Camera Type DSLR DSLR
Sensor
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Sensor Size APS-H (approx 27.9 x 18.6 mm) APS-C (approx 22.3 x 14.9 mm)
Sensor Type CMOS CMOS
Resolution 3504 x 2336 pixels 3504 x 2336 pixels
Megapixels 8,2 MP 8,2 MP
Image Processor DIGIC 2 DIGIC 2
Image
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
ISO Range 50 - 3200 100 - 3200
White Balance Presets 8 6
Custom White Balance Yes Yes
Image Stabilization No No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Autofocus Motor Yes Yes
Autofocus Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Focus Points 45 9
Lens Mount Canon EF

See Compatible Lenses
Canon EF
Canon EF-S

See Compatible Lenses
Focal Length Multiplier APS-H Sensor
1.3x multiplier
Example:
24 mm becomes 31 mm
50 mm becomes 65 mm
100 mm becomes 130 mm
200 mm becomes 260 mm
APS-C Sensor
1.6x multiplier
Example:
24 mm becomes 38 mm
50 mm becomes 80 mm
100 mm becomes 160 mm
200 mm becomes 320 mm
Screen & Viewfinder
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Articulated LCD Fixed Fixed
Screen size 2.5” 1.8”
Screen dots 230000 118000
Touch screen No No
Screen type N/A N/A
Live view No No
Viewfinder Type Optical (pentaprism) Optical (pentaprism)
Viewfinder Coverage 100% 95%
Viewfinder Magnification 0.72× (0.55× 35mm equiv.) 0.9× (0.56× 35mm equiv.)
Viewfinder Resolution N/A N/A
Photography features
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Frames per second 8,5 fps 5 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 seconds 1/8000 seconds
Built-in Flash No Yes
Built-in Flash Range N/A 12 meters
External Flash Yes Yes
Self-Timer Yes Yes
Time-lapse Yes Yes
Metering modes Multi
Center Weighted
Spot
Partial
Multi
Center Weighted
Partial
Exposure Compensation +/- 3 (at 1/3 EV, 1/2 EV steps) +/- 2 (at 1/3 EV, 1/2 EV steps)
Videography features
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Video recording No No
Video format N/A N/A
Video resolution N/A N/A
Built-in Microphone No No
Built-in Speakers No No
Storage
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Memory Card Compact Flash
Compact Flash
Connectivity
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
HDMI Output No No
Microphone Port No No
Headphone Port No No
Wireless No No
Remote Control Yes (N3 connector) Yes (N3 connector)
GPS No No
Body & Dimensions
Canon EOS 1D Mark IIn
Canon EOS 20D Astrophotography
Enviromentally sealed No No
Battery Battery Pack Battery Pack
Battery Details Ni-MH Pack NP-E3
Battery Pack BP-511A
Battery Life (CIPA) N/A 1000 shots
Width 156 mm 144 mm
Height 158 mm 106 mm
Depth 80 mm 72 mm
Weight 1565 gram 770 gram