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Olympus E-M5 III vs Sony A7S III

Portability
80
Imaging
62
Features
88
Overall
72
Olympus OM-D E-M5 III front
 
Sony Alpha A7S III front
Portability
61
Imaging
65
Features
92
Overall
75

Olympus E-M5 III vs Sony A7S III Key Specs

Olympus E-M5 III
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Screen
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 414g - 125 x 85 x 50mm
  • Introduced October 2019
  • Previous Model is Olympus E-M5 II
  • Replacement is OM System OM-5
Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Screen
  • ISO 80 - 102400 (Bump to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 699g - 129 x 97 x 81mm
  • Announced July 2020
  • Succeeded the Sony A7S II
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Olympus E-M5 III vs Sony A7S III Overview

Below, we will be matching up the Olympus E-M5 III versus Sony A7S III, one is a Advanced Mirrorless and the latter is a Pro Mirrorless by manufacturers Olympus and Sony. There is a big difference among the sensor resolutions of the E-M5 III (20MP) and A7S III (12MP) and the E-M5 III (Four Thirds) and A7S III (Full frame) enjoy totally different sensor size.

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The E-M5 III was revealed 9 months before the A7S III and they are of a similar generation. Each of these cameras come with the identical body type (SLR-style mirrorless).

Before diving through a complete comparison, below is a simple summation of how the E-M5 III grades versus the A7S III in regards to portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M5 III over the Sony A7S III

 E-M5 III A7S III 

Reasons to pick Sony A7S III over the Olympus E-M5 III

 A7S III E-M5 III 
AnnouncedJuly 2020October 2019Newer by 9 months
Screen resolution1440k1040kClearer screen (+400k dot)

Common features in the Olympus E-M5 III and Sony A7S III

 E-M5 III A7S III 
Focus manually More precise focus
Screen typeFully ArticulatedFully articulatedFully Articulated screen
Screen dimension3"3"Identical screen size
Selfie screen Both are selfie friendly
Touch screen Quickly navigate

Olympus E-M5 III vs Sony A7S III Physical Comparison

For anybody who is intending to travel with your camera frequently, you're going to have to factor in its weight and volume. The Olympus E-M5 III comes with external measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") with a weight of 414 grams (0.91 lbs) whilst the Sony A7S III has sizing of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") with a weight of 699 grams (1.54 lbs).

Contrast the Olympus E-M5 III versus Sony A7S III in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will vary depending on the lens you are employing at that time. Below is the front view overall size comparison of the E-M5 III versus the A7S III.

Olympus E-M5 III vs Sony A7S III size comparison

Factoring in size and weight, the portability rating of the E-M5 III and A7S III is 80 and 61 respectively.

Olympus E-M5 III vs Sony A7S III top view buttons comparison

Olympus E-M5 III vs Sony A7S III Sensor Comparison

Often, it is difficult to visualise the difference in sensor dimensions just by viewing specifications. The pic below will provide you a greater sense of the sensor sizing in the E-M5 III and A7S III.

Plainly, both of those cameras have got different megapixel count and different sensor dimensions. The E-M5 III having a smaller sensor will make achieving bokeh harder and the Olympus E-M5 III will provide you with more detail because of its extra 8 Megapixels. Higher resolution will make it easier to crop pictures much more aggressively. The more aged E-M5 III will be behind with regard to sensor tech.

Olympus E-M5 III vs Sony A7S III sensor size comparison

Olympus E-M5 III vs Sony A7S III Screen and ViewFinder

Olympus E-M5 III vs Sony A7S III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M5 III as a Portrait photography camera
Sony A7S III as a Portrait photography camera
77
focusing manually
sensor resolution is decent (20 megapixels)
decent sensor size (Four Thirds)
features face detect autofocus
saves RAW files
71
you can focus manually
sensor size is great (Full frame)
comes with face detection autofocus
delivers RAW files
sensor resolution not great (12 megapixels)
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Street Comparison

Olympus E-M5 III Street photography information
Sony A7S III Street photography information
83
screen can move to multiple angles
built in image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
saves RAW files
boasts touch focus
weather proofing
above average ISO range (25,600)
76
image stabilization (Sensor based 5-axis)
sensor size is great (Full frame)
delivers RAW files
has touch focus
weather sealing
good ISO range (102,400)
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Sports Comparison

Sports photography with Olympus E-M5 III
Sports photography with Sony A7S III
76
high shutter speed (1/8,000 seconds)
silent shutter (1/32,000 seconds)
max frames per second high (30.0 fps)
built in image stabilization (Sensor based 5-axis)
sensor resolution is decent (20 megapixels)
decent sensor size (Four Thirds)
features tracking focus
weather proofing
sensor has phase detect autofocus
low battery (310 CIPA)
76
great max shutter speed (1/8,000s)
image stabilization (Sensor based 5-axis)
sensor size is great (Full frame)
comes with tracking autofocus
weather sealing
better than average battery life (600 per charge)
has phase detect autofocus
sensor resolution not great (12MP)
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Travel Comparison

Travel photography with Olympus E-M5 III
Travel photography with Sony A7S III
77
weather proofing
connects via bluetooth
boasts touch focus
sensor resolution is decent (20 megapixels)
selfie friendly display
low battery (310 shots)
70
better than average battery life (600 CIPA)
weather sealing
has bluetooth
has touch focus
selfie friendly screen
sensor resolution not great (12 megapixels)
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Landscape Comparison

Olympus E-M5 III Landscape photography advice
Sony A7S III Landscape photography advice
77
focusing manually
change lenses (Micro Four Thirds mount)
screen size is decent (3")
built in image stabilization (Sensor based 5-axis)
sensor resolution is decent (20MP)
decent sensor size (Four Thirds)
above average ISO range (25,600)
saves RAW files
weather proofing
low battery (310 shots)
77
you can focus manually
change lenses (Sony E mount)
screen size is good (3 inches)
image stabilization (Sensor based 5-axis)
sensor size is great (Full frame)
good ISO range (102,400)
delivers RAW files
weather sealing
better than average battery life (600 shots)
has dual storage slots
sensor resolution not great (12MP)
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Vlogging Comparison

Olympus E-M5 III Vlogging highlights
Sony A7S III Vlogging highlights
84
selfie friendly display
built-in touchscreen
built in image stabilization (Sensor based 5-axis)
features face detect autofocus
high res video (4096 x 2160 pxls)
includes mic socket
77
selfie friendly screen
touchscreen functionality
image stabilization (Sensor based 5-axis)
comes with face detection autofocus
high res video (3840 x 2160 resolution)
has external mic jack
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Olympus E-M5 III vs Sony A7S III Specifications

Detailed spec comparison table for Olympus E-M5 III and Sony A7S III
 Olympus OM-D E-M5 IIISony Alpha A7S III
General Information
Manufacturer Olympus Sony
Model Olympus OM-D E-M5 III Sony Alpha A7S III
Class Advanced Mirrorless Pro Mirrorless
Introduced 2019-10-17 2020-07-21
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Chip TruePic VIII Bionz XR
Sensor type MOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor dimensions 17.4 x 13mm 35.6 x 23.8mm
Sensor surface area 226.2mm² 847.3mm²
Sensor resolution 20MP 12MP
Anti aliasing filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Peak resolution 5184 x 3888 4240 x 2832
Highest native ISO 25600 102400
Highest enhanced ISO - 409600
Minimum native ISO 200 80
RAW pictures
Minimum enhanced ISO 64 50
Autofocusing
Focus manually
Autofocus touch
Continuous autofocus
Single autofocus
Tracking autofocus
Selective autofocus
Autofocus center weighted
Autofocus multi area
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Number of focus points 121 759
Lens
Lens mount Micro Four Thirds Sony E
Amount of lenses 107 121
Crop factor 2.1 1
Screen
Screen type Fully Articulated Fully articulated
Screen diagonal 3" 3"
Resolution of screen 1,040 thousand dot 1,440 thousand dot
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder type Electronic Electronic
Viewfinder resolution 2,360 thousand dot 9,440 thousand dot
Viewfinder coverage 100% 100%
Viewfinder magnification 0.68x 0.91x
Features
Minimum shutter speed 60 secs 30 secs
Fastest shutter speed 1/8000 secs 1/8000 secs
Fastest silent shutter speed 1/32000 secs -
Continuous shutter speed 30.0 frames per second 10.0 frames per second
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash range no built-in flash no built-in flash
Flash settings Auto, redeye, fill, off, redeye slow sync, slow sync, 2nd-curtain slow sync, manual no built-in flash
Hot shoe
Auto exposure bracketing
WB bracketing
Fastest flash sync 1/250 secs -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM 3840 x 2160 @ 120p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 100p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 60p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 50p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 30p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 25p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 24p / 100 Mbps, XAVC S, MP4, H.265, Linear PCM 1920 x 1080 @ 120p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 100p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 60p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 50p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 25p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 24p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
Highest video resolution 4096x2160 3840x2160
Video format MPEG-4, H.264 MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265
Mic input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 414g (0.91 pounds) 699g (1.54 pounds)
Dimensions 125 x 85 x 50mm (4.9" x 3.3" x 2.0") 129 x 97 x 81mm (5.1" x 3.8" x 3.2")
DXO scores
DXO Overall score not tested 85
DXO Color Depth score not tested 23.6
DXO Dynamic range score not tested 13.3
DXO Low light score not tested 2993
Other
Battery life 310 photographs 600 photographs
Type of battery Battery Pack Battery Pack
Battery model BLN-1 NP-FZ100
Self timer Yes (2 or 10 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting With downloadable app
Type of storage SD/SDHC/SDXC (UHS-II supported) Dual SD/CFexpress Type A slots
Storage slots 1 Two
Price at release $1,199 $3,499