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Olympus E-M1 III vs Sony A7S II

Portability
67
Imaging
62
Features
96
Overall
75
Olympus OM-D E-M1 Mark III front
 
Sony Alpha A7S II front
Portability
68
Imaging
62
Features
76
Overall
67

Olympus E-M1 III vs Sony A7S II Key Specs

Olympus E-M1 III
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 580g - 134 x 91 x 69mm
  • Introduced February 2020
  • Old Model is Olympus E-M1 II
Sony A7S II
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 102400 (Push to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 627g - 127 x 96 x 60mm
  • Released October 2015
  • Previous Model is Sony A7S
  • Newer Model is Sony A7S III
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Olympus E-M1 III vs Sony A7S II Overview

Below, we will be contrasting the Olympus E-M1 III and Sony A7S II, both Pro Mirrorless digital cameras by brands Olympus and Sony. There is a big difference between the resolutions of the E-M1 III (20MP) and A7S II (12MP) and the E-M1 III (Four Thirds) and A7S II (Full frame) enjoy different sensor dimensions.

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The E-M1 III was brought out 4 years after the A7S II which is quite a big gap as far as tech is concerned. Each of these cameras come with the identical body type (SLR-style mirrorless).

Before diving in to a complete comparison, below is a brief view of how the E-M1 III matches up vs the A7S II for portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M1 III over the Sony A7S II

 E-M1 III A7S II 
ReleasedFebruary 2020October 2015Newer by 53 months
Screen typeFully ArticulatedTiltingFully Articulating screen
Selfie screen Easy selfies
Touch friendly screen Quickly navigate

Reasons to pick Sony A7S II over the Olympus E-M1 III

 A7S II E-M1 III 
Screen resolution1229k1037kClearer screen (+192k dot)

Common features in the Olympus E-M1 III and Sony A7S II

 E-M1 III A7S II 
Manual focus Dial accurate focusing
Screen dimension3"3"Identical screen sizing

Olympus E-M1 III vs Sony A7S II Physical Comparison

For anyone who is intending to travel with your camera regularly, you should factor in its weight and dimensions. The Olympus E-M1 III has outer dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) whilst the Sony A7S II has dimensions of 127mm x 96mm x 60mm (5.0" x 3.8" x 2.4") accompanied by a weight of 627 grams (1.38 lbs).

Look at the Olympus E-M1 III and Sony A7S II in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an Interchangeable Lens Camera will change dependant on the lens you choose at that moment. The following is the front view size comparison of the E-M1 III and the A7S II.

Olympus E-M1 III vs Sony A7S II size comparison

Factoring in size and weight, the portability rating of the E-M1 III and A7S II is 67 and 68 respectively.

Olympus E-M1 III vs Sony A7S II top view buttons comparison

Olympus E-M1 III vs Sony A7S II Sensor Comparison

Generally, it is hard to visualize the contrast between sensor dimensions merely by checking specs. The pic underneath will provide you a greater sense of the sensor dimensions in the E-M1 III and A7S II.

As you can plainly see, both the cameras have got different megapixels and different sensor dimensions. The E-M1 III featuring a tinier sensor is going to make shooting shallow DOF tougher and the Olympus E-M1 III will give you greater detail having its extra 8MP. Higher resolution can also make it easier to crop photographs much more aggressively. The more modern E-M1 III provides a benefit in sensor technology.

Olympus E-M1 III vs Sony A7S II sensor size comparison

Olympus E-M1 III vs Sony A7S II Screen and ViewFinder

Olympus E-M1 III vs Sony A7S II Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M1 III Portrait photography features
Sony A7S II Portrait photography features
77
focusing manually
good resolution (20 megapixels)
decent sensor size (Four Thirds)
provides face detect focus
saves RAW formats
69
focusing manually
big sensor size (Full frame)
provides face detection focusing
delivers RAW files
MP count low (12 megapixels)
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Street Comparison

Olympus E-M1 III Street photography factors
Sony A7S II Street photography factors
78
fully articulated screen
has image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
saves RAW formats
offers touch focus
environment sealing
above average ISO range (25,600)
78
has a tilting screen
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
delivers RAW files
weather proofing
great high ISO (102,400)
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Sports Comparison

Olympus E-M1 III Sports photography features
Sony A7S II Sports photography features
81
high shutter speed (1/8,000s)
quiet shooting (1/32,000s)
fast continuous shooting (60.0 frames per second)
has image stabilization (Sensor based 5-axis)
good resolution (20MP)
decent sensor size (Four Thirds)
provides tracking focus
environment sealing
sensor has phase detect auto focus
58
great max shutter speed (1/8,000s)
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
provides tracking autofocus
weather proofing
continuous shooting slow (5.0 frames per second)
MP count low (12 megapixels)
terrible battery life (370 CIPA)
does not have phase detect AF
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Travel Comparison

Olympus E-M1 III as a Travel photography camera
Sony A7S II as a Travel photography camera
79
environment sealing
connects via bluetooth
offers touch focus
good resolution (20 megapixels)
display is selfie friendly
49
weather proofing
terrible battery life (370 CIPA)
MP count low (12 megapixels)
display isn't selfie friendly
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Landscape Comparison

Olympus E-M1 III as a Landscape photography camera
Sony A7S II as a Landscape photography camera
81
focusing manually
switch lenses (Micro Four Thirds mount)
nice screen size (3 inch)
has image stabilization (Sensor based 5-axis)
good resolution (20MP)
decent sensor size (Four Thirds)
no anti-alias filter
above average ISO range (25,600)
saves RAW formats
environment sealing
two card slots
71
focusing manually
switch lenses (Sony E mount)
screen size is good (3 inches)
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
great high ISO (102,400)
delivers RAW files
weather proofing
MP count low (12 megapixels)
terrible battery life (370 CIPA)
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Vlogging Comparison

Olympus E-M1 III Vlogging details
Sony A7S II Vlogging details
79
display is selfie friendly
touchscreen
has image stabilization (Sensor based 5-axis)
provides face detect focus
video res high (4096 x 2160 pixels)
includes mic socket
35
image stabilization (Sensor based 5-axis)
provides face detection focusing
high res video (3840 x 2160 pxls)
has external mic support
display isn't selfie friendly
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Olympus E-M1 III vs Sony A7S II Specifications

Detailed spec comparison table for Olympus E-M1 III and Sony A7S II
 Olympus OM-D E-M1 Mark IIISony Alpha A7S II
General Information
Company Olympus Sony
Model Olympus OM-D E-M1 Mark III Sony Alpha A7S II
Type Pro Mirrorless Pro Mirrorless
Introduced 2020-02-11 2015-10-12
Physical type SLR-style mirrorless SLR-style mirrorless
Sensor Information
Chip TruePic IX Bionz X
Sensor type CMOS 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 20 megapixels 12 megapixels
Anti aliasing filter
Aspect ratio 4:3 3:2 and 16:9
Highest Possible resolution 5184 x 3888 4240 x 2832
Maximum native ISO 25600 102400
Maximum enhanced ISO - 409600
Minimum native ISO 200 100
RAW files
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 detect autofocus
Contract detect autofocus
Phase detect autofocus
Number of focus points 121 169
Cross focus points 121 -
Lens
Lens mounting type Micro Four Thirds Sony E
Amount of lenses 107 121
Crop factor 2.1 1
Screen
Display type Fully Articulated Tilting
Display diagonal 3 inches 3 inches
Display resolution 1,037k dots 1,229k dots
Selfie friendly
Liveview
Touch screen
Viewfinder Information
Viewfinder type Electronic Electronic
Viewfinder resolution 2,360k dots 2,359k dots
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.74x 0.78x
Features
Minimum shutter speed 60 seconds 30 seconds
Fastest shutter speed 1/8000 seconds 1/8000 seconds
Fastest quiet shutter speed 1/32000 seconds -
Continuous shutter rate 60.0 frames per second 5.0 frames per second
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Built-in flash
Flash range no built-in flash no built-in flash
Flash options 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
Fastest flash synchronize 1/250 seconds -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 25p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 23.98p / 102 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 60p, MOV, H.264, Linear PCM1920 x 1080 @ 50p, MOV, H.264, Linear PCM1920 x 1080 @ 30p, MOV, H.264, Linear PCM1920 x 1080 @ 25p, MOV, H.264, Linear PCM1920 x 1080 @ 23.98p, MOV, H.264, Linear PCM 4K (3840 x 2160 @ 30p/24p [60-100Mbps]), Full HD (1920 x 1080 @ 120p/60p/60i/30p/24p [50-100Mbps]), 720p (30p [16Mbps])
Maximum video resolution 4096x2160 3840x2160
Video format MPEG-4, H.264 MPEG-4, AVCHD, XAVC S
Mic support
Headphone support
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 3.1 Gen 1 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 580g (1.28 lbs) 627g (1.38 lbs)
Dimensions 134 x 91 x 69mm (5.3" x 3.6" x 2.7") 127 x 96 x 60mm (5.0" x 3.8" x 2.4")
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 420 photographs 370 photographs
Battery style Battery Pack Battery Pack
Battery model BLH-1 NP-FW50
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse recording With downloadable app
Type of storage Dual SD/SDHC/SDXC slots (UHS-II on first slot) SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Card slots 2 Single
Price at release $1,800 $2,767