Sony a55 vs Canon EOS R3

This is a full comparison between the cameras Sony a55 and Canon EOS R3. We compare them by looking at the categories you see below.

Manufacturing

Sony a55 is manufacturered by Sony but Canon EOS R3 is from Canon. Both Sony and Canon are well known brands though.

Type of camera

Sensors / crop factor

These cameras have different sensors. Sony a55 has a "Sony APS-C"-sensor while Canon EOS R3 has a "Canon Full Frame"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

** 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 a55 has a 16 MP (Megapixels) resolution while Canon EOS R3 has 24 MP. If we break down this in more detail this is the data behind the numbers:

Canon EOS R3 has a 50 % larger resolution than Sony a55. 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 R3 has a larger ISO-range than Sony a55. Canon EOS R3 has an ISO range that stretches from 100 to 102400 while Sony a55 has 100 to 12800.

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.

Worth mentioning is that Canon EOS R3 belongs to the Canon EOS R-system and needs an adapter to work with Canons EF, EF-S, MP-E, and TS-E lenses. You can read more about this adapter here:
Canon Lens Mount Adapter EF-EOS R

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a55
Lens compatibility chart for Canon EOS R3

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a55 can shoot up to 10 pictures per seconds and Canon EOS R3 can shoot up to 30 pictures per seconds.

Ability to record movies

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

In this case, both Sony a55 and Canon EOS R3 can shoot movies.

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 R3 weighs 1015 gr (equal to 2.24 lb) which is 103% heavier than Sony a55 and its 500 gr (or 1.1 lb).

Sony a55 vs Canon EOS R3 Specs

Below you will find the complete and detailed technical specs for both Sony a55 and Canon EOS R3, 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 a55	Canon EOS R3
Name	Sony a55	Canon EOS R3
Manufacturer	Sony	Canon
Release Date and Price	Sony a55	Canon EOS R3
Release Year	2010	2021
Release Date	2010-08-24	2021-04-14
MSRP	749 USD	5999 USD
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Camera Type	Sony a55	Canon EOS R3
Camera Type	SLT	Mirrorless
Sensor	Sony a55	Canon EOS R3
Sensor Size	APS-C (approx 23.5 x 15.6 mm)	Full Frame (approx 36 x 24 mm)
Sensor Type	CMOS	Stacked CMOS
Resolution	4912 x 3264 pixels	6000 x 4000 pixels
Megapixels	16 MP	24 MP
Image Processor	Bionz	DIGIC X
Image	Sony a55	Canon EOS R3
ISO Range	100 - 12800	100 - 102400
White Balance Presets	6	6
Custom White Balance	Yes	No
Image Stabilization	Yes (Sensor-Shift)	Yes (Sensor-Shift)
Image Stabilization CIPA Rating	0 stops	0 stops
Uncompressed format	RAW	RAW
Optics & Focus	Sony a55	Canon EOS R3
Autofocus Motor	Yes	Yes
Autofocus	Phase Detect Multi Area Selective Single Point Single Continuous Face Detection LiveView	Contract Detect (sensor) Phase Detect Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView
Focus Points	15	1053
Lens Mount	Sony A See Compatible Lenses	Canon RF 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	Full frame No multiplier Example: 24 mm remains 24 mm 50 mm remains 50 mm 100 mm remains 100 mm 200 mm remains 200 mm
Screen & Viewfinder	Sony a55	Canon EOS R3
Articulated LCD	Fully articulated	Fully articulated
Screen size	3”	3.2”
Screen dots	921000	4150000
Touch screen	No	Yes
Screen type	N/A	TFT LCD
Live view	Yes	Yes
Viewfinder Type	Electronic	Electronic
Viewfinder Coverage	100%	100%
Viewfinder Magnification	1.1× (0.73× 35mm equiv.)	0.76×
Viewfinder Resolution	N/A	5760000
Photography features	Sony a55	Canon EOS R3
Frames per second	10 fps	30 fps
Minimum Shutter Speed	30 seconds	30 seconds
Maximum Shutter Speed	1/4000 seconds	1/8000 seconds
Built-in Flash	Yes	No
Built-in Flash Range	10 meters	N/A
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	No	Yes
Metering modes	Multi Center Weighted Spot	Multi Center Weighted Spot Partial
Exposure Compensation	+/- 2 (at 1/3 EV steps)	+/- 3 (at 1/3 EV, 1/2 EV steps)
Videography features	Sony a55	Canon EOS R3
Video recording	Yes	Yes
Video format	MPEG4 H.264 AVCHD	MPEG4 H.264 H.265
Video resolution	1440 x 1080 1920 x 1080	1920 x 1080 3840 x 2160 4096 x 2160
Built-in Microphone	Yes	Yes
Built-in Speakers	No	Yes
Storage	Sony a55	Canon EOS R3
Memory Card	Memory Stick Pro Duo SD/SDHC	Compact Flash Express SD/SDHC
Connectivity	Sony a55	Canon EOS R3
HDMI Output	Yes	Yes
Microphone Port	No	Yes
Headphone Port	No	Yes
Wireless	Yes Eye-Fi Connected	Yes Built-in (802.11ac + Bluetooth)
Remote Control	Yes (Optional)	Yes (via smartphone)
GPS	Yes Built-in	Yes Built-in
Body & Dimensions	Sony a55	Canon EOS R3
Enviromentally sealed	No	Yes
Battery	Battery Pack	Built-in
Battery Details	Rechargeable NP-FW50 battery & charger	LP-E19 lithium-ion battery & charger
Battery Life (CIPA)	380 shots	760 shots
Width	124 mm	150 mm
Height	92 mm	143 mm
Depth	85 mm	87 mm
Weight	500 gram	1015 gram