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Olympus E-M1X vs Sony A7S III

Portability
54
Imaging
62
Features
93
Overall
74
Olympus OM-D E-M1X front
 
Sony Alpha A7S III front
Portability
61
Imaging
65
Features
92
Overall
75

Olympus E-M1X vs Sony A7S III Key Specs

Olympus E-M1X
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 997g - 144 x 147 x 75mm
  • Revealed January 2019
  • Earlier Model is Olympus E-M1 II
Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Screen
  • ISO 80 - 102400 (Boost to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 699g - 129 x 97 x 81mm
  • Introduced July 2020
  • Older Model is Sony A7S II
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Olympus E-M1X vs Sony A7S III Overview

Below, we will be reviewing the Olympus E-M1X versus Sony A7S III, both Pro Mirrorless digital cameras by companies Olympus and Sony. There exists a large gap between the sensor resolutions of the E-M1X (20MP) and A7S III (12MP) and the E-M1X (Four Thirds) and A7S III (Full frame) come with totally different sensor sizes.

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The E-M1X was announced 18 months before the A7S III which makes the cameras a generation apart from one another. Both the cameras come with the identical body type (SLR-style mirrorless).

Before delving in to a complete comparison, below is a short introduction of how the E-M1X grades versus the A7S III in the way of portability, imaging, features and an overall rating.

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Reasons to pick Olympus E-M1X over the Sony A7S III

 E-M1X A7S III 

Reasons to pick Sony A7S III over the Olympus E-M1X

 A7S III E-M1X 
IntroducedJuly 2020January 2019Fresher by 18 months
Screen resolution1440k1037kSharper screen (+403k dot)

Common features in the Olympus E-M1X and Sony A7S III

 E-M1X A7S III 
Manual focus Dial accurate focus
Screen typeFully ArticulatedFully articulatedFully Articulated screen
Screen dimension3"3"Identical screen dimensions
Selfie screen Both good for selfies
Touch screen Quickly navigate

Olympus E-M1X vs Sony A7S III Physical Comparison

For anybody who is looking to carry your camera frequently, you'll have to think about its weight and measurements. The Olympus E-M1X offers exterior dimensions of 144mm x 147mm x 75mm (5.7" x 5.8" x 3.0") along with a weight of 997 grams (2.20 lbs) whilst the Sony A7S III has proportions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") having a weight of 699 grams (1.54 lbs).

Take a look at the Olympus E-M1X versus Sony A7S III in our newest Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an ILC will vary dependant on the lens you use at that moment. Underneath is the front view measurements comparison of the E-M1X and the A7S III.

Olympus E-M1X vs Sony A7S III size comparison

Using dimensions and weight, the portability score of the E-M1X and A7S III is 54 and 61 respectively.

Olympus E-M1X vs Sony A7S III top view buttons comparison

Olympus E-M1X vs Sony A7S III Sensor Comparison

More often than not, it is tough to see the gap between sensor sizing merely by reading technical specs. The graphic here might offer you a much better sense of the sensor sizes in the E-M1X and A7S III.

As you have seen, the two cameras posses different resolutions and different sensor sizing. The E-M1X with its tinier sensor will make achieving shallower depth of field trickier and the Olympus E-M1X will offer you more detail with its extra 8MP. Higher resolution will allow you to crop pictures somewhat more aggressively. The older E-M1X is going to be behind when it comes to sensor tech.

Olympus E-M1X vs Sony A7S III sensor size comparison

Olympus E-M1X vs Sony A7S III Screen and ViewFinder

Olympus E-M1X vs Sony A7S III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Olympus E-M1X
Portrait photography with Sony A7S III
77
focusing manually
decent sensor resolution (20MP)
decent sensor size (Four Thirds)
features face detect focusing
delivers RAW files
71
focusing manually
great sensor size (Full frame)
comes with face detection autofocus
exports RAW formats
low megapixels (12 megapixels)
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Street Comparison

Olympus E-M1X Street photography info
Sony A7S III Street photography info
67
fully articulated screen
has image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
delivers RAW files
features touch to focus
weather sealing
above average ISO range (25,600)
more heavy than competitors in class (997g)
76
image stabilization (Sensor based 5-axis)
great sensor size (Full frame)
exports RAW formats
features touch focus
weather proof
good ISO range (102,400)
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Sports Comparison

Olympus E-M1X Sports photography advice
Sony A7S III Sports photography advice
81
great max shutter speed (1/8,000 seconds)
silent shooting (1/32,000 seconds)
fast shooting (60.0 fps)
has image stabilization (Sensor based 5-axis)
decent sensor resolution (20 megapixels)
decent sensor size (Four Thirds)
features tracking focus
weather sealing
great battery life (870 CIPA)
supports phase detect AF
76
maximum shutter speed is high (1/8,000s)
image stabilization (Sensor based 5-axis)
great sensor size (Full frame)
comes with tracking autofocus
weather proof
great battery power (600 CIPA)
supports phase detect autofocus
low megapixels (12 megapixels)
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Travel Comparison

Travel photography with Olympus E-M1X
Travel photography with Sony A7S III
68
great battery life (870 per charge)
weather sealing
supports bluetooth
features touch to focus
decent sensor resolution (20MP)
selfie friendly display
more heavy than competitors in class (997g)
70
great battery power (600 CIPA)
weather proof
connects via bluetooth
features touch focus
display is selfie friendly
low megapixels (12 megapixels)
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Landscape Comparison

Olympus E-M1X Landscape photography features
Sony A7S III Landscape photography features
80
focusing manually
change lenses (Micro Four Thirds mount)
decent sized screen (3 inches)
has image stabilization (Sensor based 5-axis)
decent sensor resolution (20MP)
decent sensor size (Four Thirds)
above average ISO range (25,600)
delivers RAW files
weather sealing
great battery life (870 per charge)
two card slots
77
focusing manually
interchangeable lenses (Sony E mount)
pretty good screen size (3")
image stabilization (Sensor based 5-axis)
great sensor size (Full frame)
good ISO range (102,400)
exports RAW formats
weather proof
great battery power (600 per charge)
has dual storage slots
low megapixels (12 megapixels)
Photography Glossary

Vlogging Comparison

Vlogging with Olympus E-M1X
Vlogging with Sony A7S III
68
selfie friendly display
has touchscreen
has image stabilization (Sensor based 5-axis)
features face detect focusing
good video quality (4096 x 2160 pxls)
comes with microphone socket
more heavy than competitors in class (997 grams)
77
display is selfie friendly
touchscreen functionality
image stabilization (Sensor based 5-axis)
comes with face detection autofocus
high res video (3840 x 2160 pixels)
comes with external microphone jack
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Olympus E-M1X vs Sony A7S III Specifications

Detailed spec comparison table for Olympus E-M1X and Sony A7S III
 Olympus OM-D E-M1XSony Alpha A7S III
General Information
Manufacturer Olympus Sony
Model type Olympus OM-D E-M1X Sony Alpha A7S III
Category Pro Mirrorless Pro Mirrorless
Revealed 2019-01-24 2020-07-21
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Chip Dual TruePic VIII Bionz XR
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor measurements 17.4 x 13mm 35.6 x 23.8mm
Sensor area 226.2mm² 847.3mm²
Sensor resolution 20 megapixels 12 megapixels
Anti alias filter
Aspect ratio 4:3 3:2 and 16:9
Highest resolution 5184 x 3888 4240 x 2832
Highest native ISO 25600 102400
Highest boosted ISO - 409600
Lowest native ISO 200 80
RAW support
Lowest boosted ISO 64 50
Autofocusing
Focus manually
Touch focus
Autofocus continuous
Single autofocus
Autofocus tracking
Selective autofocus
Center weighted autofocus
Multi area autofocus
Autofocus live view
Face detect focus
Contract detect focus
Phase detect focus
Total focus points 121 759
Lens
Lens mount type Micro Four Thirds Sony E
Amount of lenses 107 121
Crop factor 2.1 1
Screen
Range of display Fully Articulated Fully articulated
Display size 3 inch 3 inch
Resolution of display 1,037 thousand dot 1,440 thousand dot
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 2,360 thousand dot 9,440 thousand dot
Viewfinder coverage 100% 100%
Viewfinder magnification 0.74x 0.91x
Features
Lowest shutter speed 60 secs 30 secs
Highest shutter speed 1/8000 secs 1/8000 secs
Highest quiet shutter speed 1/32000 secs -
Continuous shooting speed 60.0 frames/s 10.0 frames/s
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Inbuilt flash
Flash distance no built-in flash no built-in flash
Flash modes Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync.(1st curtain), Slow sync (2nd curtain), manual no built-in flash
Hot shoe
AE bracketing
WB bracketing
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
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
Microphone input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB Yes (USB-PD allows charging by laptop or external power bank) USB 3.2 Gen 1 (5 GBit/sec)
GPS Built-in None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 997g (2.20 lbs) 699g (1.54 lbs)
Dimensions 144 x 147 x 75mm (5.7" x 5.8" x 3.0") 129 x 97 x 81mm (5.1" x 3.8" x 3.2")
DXO scores
DXO All around rating not tested 85
DXO Color Depth rating not tested 23.6
DXO Dynamic range rating not tested 13.3
DXO Low light rating not tested 2993
Other
Battery life 870 photographs 600 photographs
Battery format Built-in Battery Pack
Battery ID - NP-FZ100
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse feature With downloadable app
Type of storage - Dual SD/CFexpress Type A slots
Storage slots Two Two
Retail price $2,999 $3,499