Canon EOS Rebel T6i vs Canon EOS 20D Astrophotography

This is a full comparison between the cameras Canon EOS Rebel T6i and Canon EOS 20D Astrophotography. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Canon.

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.

** 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 T6i has a 24 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:

Canon EOS Rebel T6i has a 193 % 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 T6i has a larger ISO-range than Canon EOS 20D Astrophotography. Canon EOS Rebel T6i has an ISO range that stretches from 100 to 12800 while Canon EOS 20D Astrophotography has 100 to 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 T6i
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 T6i can shoot up to 5 pictures per seconds and Canon EOS 20D Astrophotography can shoot up to 5 pictures per seconds.

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 T6i. 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 39% heavier than Canon EOS Rebel T6i and its 555 gr (or 1.22 lb).

Canon EOS Rebel T6i vs Canon EOS 20D Astrophotography Specs

Below you will find the complete and detailed technical specs for both Canon EOS Rebel T6i 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 T6i	Canon EOS 20D Astrophotography
Name	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
Manufacturer	Canon	Canon
Release Date and Price	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
Release Year	2015	2005
Release Date	2015-02-06	2005-06-01
MSRP	749 USD	1499 USD
Buy it today
Camera Type	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
Camera Type	DSLR	DSLR
Sensor	Canon EOS Rebel T6i	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	6000 x 4000 pixels	3504 x 2336 pixels
Megapixels	24 MP	8,2 MP
Image Processor	DIGIC 6	DIGIC 2
Image	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
ISO Range	100 - 12800	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 Rebel T6i	Canon EOS 20D Astrophotography
Autofocus Motor	Yes	Yes
Autofocus	Contract Detect (sensor) Phase Detect Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView	Phase Detect Multi Area Selective Single Point Single Continuous
Focus Points	19	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 T6i	Canon EOS 20D Astrophotography
Articulated LCD	Fully articulated	Fixed
Screen size	3”	1.8”
Screen dots	1040000	118000
Touch screen	Yes	No
Screen type	TFT LCD	N/A
Live view	Yes	No
Viewfinder Type	Optical (pentamirror)	Optical (pentaprism)
Viewfinder Coverage	95%	95%
Viewfinder Magnification	0.82× (0.51× 35mm equiv.)	0.9× (0.56× 35mm equiv.)
Viewfinder Resolution	0	N/A
Photography features	Canon EOS Rebel T6i	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	12 meters	12 meters
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	No	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 T6i	Canon EOS 20D Astrophotography
Video recording	Yes	No
Video format	MPEG4 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 T6i	Canon EOS 20D Astrophotography
Memory Card	SD/SDHC	Compact Flash
Connectivity	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
HDMI Output	Yes	No
Microphone Port	Yes	No
Headphone Port	No	No
Wireless	Yes Built-in (802.11b/g/n with NFC)	No
Remote Control	Yes (wired or via smartphone)	Yes (N3 connector)
GPS	No	No
Body & Dimensions	Canon EOS Rebel T6i	Canon EOS 20D Astrophotography
Enviromentally sealed	No	No
Battery	Battery Pack	Battery Pack
Battery Details	LP-E17 lithium-ion battery and charger	Battery Pack BP-511A
Battery Life (CIPA)	440 shots	1000 shots
Width	132 mm	144 mm
Height	101 mm	106 mm
Depth	78 mm	72 mm
Weight	555 gram	770 gram