Sony a77 vs Canon EOS 20D

This is a full comparison between the cameras Sony a77 and Canon EOS 20D. We compare them by looking at the categories you see below.

Manufacturing

Sony a77 is manufacturered by Sony but Canon EOS 20D is from Canon. Both Sony and Canon are well known brands though.

Sony a77 were released 2011 and Canon EOS 20D was released 2004. That is a 7 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Sony a77 2011
Canon EOS 20D 2004

Type of camera

Sensors / crop factor

These cameras have different sensors. Sony a77 has a "Sony APS-C"-sensor while Canon EOS 20D 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 **
Sony a77 75 mm
Sony APS-C sensor
Crop factor/focal length multiplier by * 1.5
Canon EOS 20D 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 (Sony)
Camera selection can affect the focal length (Canon)

Resolution

Sony a77 has a 24 MP (Megapixels) resolution while Canon EOS 20D has 8,2 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Sony a77 24 MP
24000000 pixels
6000 x 4000
Canon EOS 20D 8,2 MP
8185344 pixels
3504 x 2336

Sony a77 has a 193 % larger resolution than Canon EOS 20D. 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

Sony a77 has a larger ISO-range than Canon EOS 20D. Sony a77 has an ISO range that stretches from 100 to 16000 while Canon EOS 20D has 100 to 3200.

Camera ISO Range
Sony a77 100-16000
Canon EOS 20D 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 Sony a77
Lens compatibility chart for Canon EOS 20D

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a77 can shoot up to 12 pictures per seconds and Canon EOS 20D can shoot up to 5 pictures per seconds.

Camera FPS (Frames per second)
Sony a77 12
Canon EOS 20D 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 Sony a77. Unfortunately Canon EOS 20D 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 weighs 770 gr (equal to 1.7 lb) which is 5% heavier than Sony a77 and its 732 gr (or 1.61 lb).

Camera Weight
Sony a77 732 gr
1.61 lb
Canon EOS 20D 770 gr
1.7 lb

Sony a77 vs Canon EOS 20D Specs

Below you will find the complete and detailed technical specs for both Sony a77 and Canon EOS 20D, 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
Sony a77
Canon EOS 20D
Name Sony a77 Canon EOS 20D
Manufacturer Sony Canon
Release Date and Price
Sony a77
Canon EOS 20D
Release Year 2011 2004
Release Date 2011-08-24 2004-08-19
MSRP 1399 USD 1499 USD
Buy it today
Camera Type
Sony a77
Canon EOS 20D
Camera Type SLT DSLR
Sensor
Sony a77
Canon EOS 20D
Sensor Size APS-C (approx 23.5 x 15.6 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 Bionz DIGIC 2
Image
Sony a77
Canon EOS 20D
ISO Range 100 - 16000 100 - 3200
White Balance Presets 8 6
Custom White Balance Yes Yes
Image Stabilization Yes
(Sensor-Shift)
No
Image Stabilization CIPA Rating 0 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Sony a77
Canon EOS 20D
Autofocus Motor Yes Yes
Autofocus Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Face Detection
LiveView
Phase Detect
Multi Area
Selective Single Point
Single
Continuous
Focus Points 19 9
Lens Mount Sony A

See Compatible Lenses
Canon EF
Canon EF-S

See Compatible Lenses
Focal Length Multiplier APS-C Sensor (1.5x)
1.5x multiplier
Example:
24 mm becomes 36 mm
50 mm becomes 75 mm
100 mm becomes 150 mm
200 mm becomes 300 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
Sony a77
Canon EOS 20D
Articulated LCD Fully articulated Fixed
Screen size 3” 1,8”
Screen dots 921000 118000
Touch screen No No
Screen type N/A N/A
Live view Yes No
Viewfinder Type Electronic Optical (pentaprism)
Viewfinder Coverage 100% 95%
Viewfinder Magnification 1.1× (0.73× 35mm equiv.) 0.9× (0.56× 35mm equiv.)
Viewfinder Resolution N/A N/A
Photography features
Sony a77
Canon EOS 20D
Frames per second 12 fps 5 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 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
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
Sony a77
Canon EOS 20D
Video recording Yes No
Video format MPEG4
H.264
AVCHD
N/A
Video resolution 1440 x 1080
1920 x 1080
N/A
Built-in Microphone Yes No
Built-in Speakers Yes No
Storage
Sony a77
Canon EOS 20D
Memory Card Memory Stick Pro Duo
SD/SDHC
Compact Flash
Connectivity
Sony a77
Canon EOS 20D
HDMI Output Yes No
Microphone Port No No
Headphone Port No No
Wireless Yes
Eye-Fi Connected
No
Remote Control Yes (Optional) Yes (N3 connector)
GPS Yes
Built-in
No
Body & Dimensions
Sony a77
Canon EOS 20D
Enviromentally sealed Yes No
Battery Battery Pack Battery Pack
Battery Details Rechargeable NP-FM500H battery & charger
BP-511A Lithium-Ion battery pack
Battery Life (CIPA) 470 shots 700 shots
Width 143 mm 144 mm
Height 104 mm 106 mm
Depth 81 mm 72 mm
Weight 732 gram 770 gram