Sony a7 III vs Canon EOS M

This is a full comparison between the cameras Sony a7 III and Canon EOS M. We compare them by looking at the categories you see below.

Manufacturing

Sony a7 III is manufacturered by Sony but Canon EOS M is from Canon. Both Sony and Canon are well known brands though.

Type of camera

Both these cameras are Mirrorless cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Sony a7 III has a "Sony Full Frame"-sensor while Canon EOS M 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 a7 III has a 24 MP (Megapixels) resolution while Canon EOS M has 18 MP. If we break down this in more detail this is the data behind the numbers:

Sony a7 III has a 34 % larger resolution than Canon EOS M. 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 a7 III has a larger ISO-range than Canon EOS M. Sony a7 III has an ISO range that stretches from 100 to 51200 while Canon EOS M 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 M belongs to the Canon EOS M-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 M

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a7 III
Lens compatibility chart for Canon EOS M

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7 III can shoot up to 10 pictures per seconds and Canon EOS M can shoot up to 4,3 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 a7 III and Canon EOS M 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.

Sony a7 III weighs 650 gr (equal to 1.43 lb) which is 118% heavier than Canon EOS M and its 298 gr (or 0.66 lb).

Sony a7 III vs Canon EOS M Specs

Below you will find the complete and detailed technical specs for both Sony a7 III and Canon EOS M, 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 a7 III	Canon EOS M
Name	Sony a7 III	Canon EOS M
Manufacturer	Sony	Canon
Release Date and Price	Sony a7 III	Canon EOS M
Release Year	2018	2012
Release Date	2018-02-27	2012-07-23
MSRP	1999 USD	799 USD
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Camera Type	Sony a7 III	Canon EOS M
Camera Type	Mirrorless	Mirrorless
Sensor	Sony a7 III	Canon EOS M
Sensor Size	Full Frame (approx 36 x 24 mm)	APS-C (approx 22.3 x 14.9 mm)
Sensor Type	BSI-CMOS	CMOS
Resolution	6000 x 4000 pixels	5184 x 3456 pixels
Megapixels	24 MP	18 MP
Image Processor	Bionz X	DIGIC 5
Image	Sony a7 III	Canon EOS M
ISO Range	100 - 51200	100 - 12800
White Balance Presets	11	6
Custom White Balance	Yes	Yes
Image Stabilization	Yes (Sensor-Shift)	No
Image Stabilization CIPA Rating	5 stops	0 stops
Uncompressed format	RAW	RAW
Optics & Focus	Sony a7 III	Canon EOS M
Autofocus Motor	Yes	Yes
Autofocus	Contract Detect (sensor) Phase Detect Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView	Contract Detect (sensor) Phase Detect Multi Area Selective Single Point Single Continuous Face Detection LiveView
Focus Points	693	31
Lens Mount	Sony E See Compatible Lenses	Canon EF-M 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 a7 III	Canon EOS M
Articulated LCD	Tilting	Fixed
Screen size	3”	3”
Screen dots	921600	1040000
Touch screen	Yes	Yes
Screen type	N/A	Clear View II TFT LCD
Live view	Yes	Yes
Viewfinder Type	Electronic	No Viewfinder
Viewfinder Coverage	100%
Viewfinder Magnification	0.78x
Viewfinder Resolution	2359296	0
Photography features	Sony a7 III	Canon EOS M
Frames per second	10 fps	4,3 fps
Minimum Shutter Speed	30 seconds	60 seconds
Maximum Shutter Speed	1/8000 seconds	1/4000 seconds
Built-in Flash	No	No
Built-in Flash Range	N/A	N/A
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	No	No
Metering modes	Multi Center Weighted Highlight Weighted Spot Average	Multi Center Weighted Spot Partial
Exposure Compensation	+/- 5 (at 1/3 EV, 1/2 EV steps)	+/- 3 (at 1/3 EV, 1/2 EV steps)
Videography features	Sony a7 III	Canon EOS M
Video recording	Yes	Yes
Video format	MPEG4 H.264 XAVC-S AVCHD	MPEG4 H.264
Video resolution	1920 x 1080 3840 x 2160	1280 x 720 1920 x 1080
Built-in Microphone	Yes	Yes
Built-in Speakers	Yes	Yes
Storage	Sony a7 III	Canon EOS M
Memory Card	Memory Stick Pro Duo SD/SDHC	SD/SDHC
Connectivity	Sony a7 III	Canon EOS M
HDMI Output	Yes	Yes
Microphone Port	Yes	No
Headphone Port	Yes	No
Wireless	Yes Built-in (with NFC and wireless control via PlayMemories Mobile app)	Yes Eye-Fi Connected
Remote Control	Wired	No
GPS	No	Yes Optional via GP-E2
Body & Dimensions	Sony a7 III	Canon EOS M
Enviromentally sealed	Yes	No
Battery	Battery Pack	Battery Pack
Battery Details	NP-FZ100 lithium-ion battery and charger	Lithium-Ion LP-E12 rechargeable battery & charger
Battery Life (CIPA)	710 shots	230 shots
Width	127 mm	109 mm
Height	96 mm	66 mm
Depth	74 mm	32 mm
Weight	650 gram	298 gram