Sony a7R IIIA vs Canon EOS 20Da

This is a full comparison between the cameras Sony a7R IIIA and Canon EOS 20Da. We compare them by looking at the categories you see below.

Manufacturing

Sony a7R IIIA is manufacturered by Sony but Canon EOS 20Da is from Canon. Both Sony and Canon are well known brands though.

Type of camera

Sony a7R IIIA is a Mirrorless camera while Canon EOS 20Da is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Sony a7R IIIA has a "Sony Full Frame"-sensor while Canon EOS 20Da 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.

** 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 a7R IIIA has a 42 MP (Megapixels) resolution while Canon EOS 20Da has 8,2 MP. If we break down this in more detail this is the data behind the numbers:

Sony a7R IIIA has a 415 % larger resolution than Canon EOS 20Da. 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 a7R IIIA has a larger ISO-range than Canon EOS 20Da. Sony a7R IIIA has an ISO range that stretches from 100 to 32000 while Canon EOS 20Da 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 Sony a7R IIIA
Lens compatibility chart for Canon EOS 20Da

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R IIIA can shoot up to 10 pictures per seconds and Canon EOS 20Da 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 Sony a7R IIIA. Unfortunately Canon EOS 20Da 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 20Da weighs 770 gr (equal to 1.7 lb) which is 17% heavier than Sony a7R IIIA and its 657 gr (or 1.45 lb).

Sony a7R IIIA vs Canon EOS 20Da Specs

Below you will find the complete and detailed technical specs for both Sony a7R IIIA and Canon EOS 20Da, 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 a7R IIIA	Canon EOS 20Da
Name	Sony a7R IIIA	Canon EOS 20Da
Manufacturer	Sony	Canon
Release Date and Price	Sony a7R IIIA	Canon EOS 20Da
Release Year	2021	2005
Release Date	2021-04-07	2005-06-01
MSRP	3199 USD	2549 USD
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Camera Type	Sony a7R IIIA	Canon EOS 20Da
Camera Type	Mirrorless	DSLR
Sensor	Sony a7R IIIA	Canon EOS 20Da
Sensor Size	Full Frame (approx 36 x 24 mm)	APS-C (approx 22.3 x 14.9 mm)
Sensor Type	BSI-CMOS	CMOS
Resolution	7952 x 5304 pixels	3504 x 2336 pixels
Megapixels	42 MP	8,2 MP
Image Processor	BIONZ X	DIGIC 2
Image	Sony a7R IIIA	Canon EOS 20Da
ISO Range	100 - 32000	100 - 3200
White Balance Presets	10	6
Custom White Balance	Yes	Yes
Image Stabilization	Yes (Sensor-Shift (5-axis))	No
Image Stabilization CIPA Rating	5.5 stops	0 stops
Uncompressed format	RAW	RAW
Optics & Focus	Sony a7R IIIA	Canon EOS 20Da
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	399	9
Lens Mount	Sony E See Compatible Lenses	Canon EF Canon EF-S See Compatible Lenses
Focal Length Multiplier	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	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 a7R IIIA	Canon EOS 20Da
Articulated LCD	Tilting	Fixed
Screen size	3”	1.8”
Screen dots	2360000	118000
Touch screen	Yes	No
Screen type	TFT LCD	N/A
Live view	Yes	No
Viewfinder Type	Electronic	Optical (pentaprism)
Viewfinder Coverage	100%	95%
Viewfinder Magnification	0.78x	0.9× (0.56× 35mm equiv.)
Viewfinder Resolution	3686400	N/A
Photography features	Sony a7R IIIA	Canon EOS 20Da
Frames per second	10 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	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 a7R IIIA	Canon EOS 20Da
Video recording	Yes	No
Video format	MPEG4 XAVC-S AVCHD	N/A
Video resolution	1920 x 1080 3840 x 2160	N/A
Built-in Microphone	Yes	No
Built-in Speakers	Yes	No
Storage	Sony a7R IIIA	Canon EOS 20Da
Memory Card	SD/SDHC	Compact Flash
Connectivity	Sony a7R IIIA	Canon EOS 20Da
HDMI Output	Yes	No
Microphone Port	Yes	No
Headphone Port	Yes	No
Wireless	Yes Built-in (802.11b/g/n + NFC + Bluetooth)	No
Remote Control	Yes (wired, wireless, smartphone)	Yes (N3 connector)
GPS	No	No
Body & Dimensions	Sony a7R IIIA	Canon EOS 20Da
Enviromentally sealed	Yes	No
Battery	Battery Pack	Battery Pack
Battery Details	NP-FZ100 lithium-ion battery and charger	Lithium-Ion BP-511A rechargeable battery
Battery Life (CIPA)	650 shots	N/A
Width	127 mm	144 mm
Height	96 mm	106 mm
Depth	74 mm	72 mm
Weight	657 gram	770 gram