Canon EOS Rebel T4i vs Canon EOS 20D Astrophotography

This is a full comparison between the cameras Canon EOS Rebel T4i and Canon EOS 20D Astrophotography. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Canon.

Canon EOS Rebel T4i were released 2012 and Canon EOS 20D Astrophotography was released 2005. That is a 7 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Canon EOS Rebel T4i 2012
Canon EOS 20D Astrophotography 2005

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-C") 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 Rebel T4i 80 mm
Canon APS-C sensor
Crop factor/focal length multiplier by * 1.6
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

Canon EOS Rebel T4i has a 18 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 Rebel T4i 18 MP
17915904 pixels
5184 x 3456
Canon EOS 20D Astrophotography 8,2 MP
8185344 pixels
3504 x 2336

Canon EOS Rebel T4i has a 119 % 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

Canon EOS Rebel T4i has a larger ISO-range than Canon EOS 20D Astrophotography. Canon EOS Rebel T4i has an ISO range that stretches from 100 to 12800 while Canon EOS 20D Astrophotography has 100 to 3200.

Camera ISO Range
Canon EOS Rebel T4i 100-12800
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 Rebel T4i
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 Rebel T4i can shoot up to 5 pictures per seconds and Canon EOS 20D Astrophotography can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Canon EOS Rebel T4i 5
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 Canon EOS Rebel T4i. Unfortunately Canon EOS 20D Astrophotography does not support recording movies and movie clips.

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 20D Astrophotography weighs 770 gr (equal to 1.7 lb) which is 34% heavier than Canon EOS Rebel T4i and its 575 gr (or 1.27 lb).

Camera Weight
Canon EOS Rebel T4i 575 gr
1.27 lb
Canon EOS 20D Astrophotography 770 gr
1.7 lb

Canon EOS Rebel T4i vs Canon EOS 20D Astrophotography Specs

Below you will find the complete and detailed technical specs for both Canon EOS Rebel T4i 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 Rebel T4i
Canon EOS 20D Astrophotography
Name Canon EOS Rebel T4i Canon EOS 20D Astrophotography
Manufacturer Canon Canon
Release Date and Price
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Release Year 2012 2005
Release Date 2012-06-08 2005-06-01
MSRP 849 USD 1499 USD
Buy it today
Camera Type
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Camera Type DSLR DSLR
Sensor
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Sensor Size APS-C (approx 22.3 x 14.9 mm) APS-C (approx 22.3 x 14.9 mm)
Sensor Type CMOS CMOS
Resolution 5184 x 3456 pixels 3504 x 2336 pixels
Megapixels 18 MP 8,2 MP
Image Processor DIGIC 5 DIGIC 2
Image
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
ISO Range 100 - 12800 100 - 3200
White Balance Presets 6 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 Rebel T4i
Canon EOS 20D Astrophotography
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Face Detection
LiveView
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Focus Points 9 9
Lens Mount Canon EF
Canon EF-S

See Compatible Lenses
Canon EF
Canon EF-S

See Compatible Lenses
Focal Length Multiplier 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
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 Rebel T4i
Canon EOS 20D Astrophotography
Articulated LCD Fully articulated Fixed
Screen size 3” 1.8”
Screen dots 1040000 118000
Touch screen Yes No
Screen type Clear View II TFT LCD N/A
Live view Yes No
Viewfinder Type Optical (pentamirror) Optical (pentaprism)
Viewfinder Coverage 95% 95%
Viewfinder Magnification 0.85× (0.53× 35mm equiv.) 0.9× (0.56× 35mm equiv.)
Viewfinder Resolution 0 N/A
Photography features
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Frames per second 5 fps 5 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/4000 seconds 1/8000 seconds
Built-in Flash Yes Yes
Built-in Flash Range 13 meters 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 +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 2 (at 1/3 EV, 1/2 EV steps)
Videography features
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Video recording Yes No
Video format Motion JPEG
H.264
N/A
Video resolution 1280 x 720
1920 x 1080
N/A
Built-in Microphone Yes No
Built-in Speakers Yes No
Storage
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Memory Card SD/SDHC
Compact Flash
Connectivity
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
HDMI Output Yes No
Microphone Port No No
Headphone Port No No
Wireless Yes
Eye-Fi Connected
No
Remote Control Yes (E3 connector, InfraRed) Yes (N3 connector)
GPS Yes
Optional via GP-E2
No
Body & Dimensions
Canon EOS Rebel T4i
Canon EOS 20D Astrophotography
Enviromentally sealed No No
Battery Battery Pack Battery Pack
Battery Details Lithium-Ion LP-E8 rechargeable battery & charger
Battery Pack BP-511A
Battery Life (CIPA) 440 shots 1000 shots
Width 133 mm 144 mm
Height 100 mm 106 mm
Depth 79 mm 72 mm
Weight 575 gram 770 gram