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Olympus E-M1 III vs Sony A9

Portability
67
Imaging
62
Features
96
Overall
75
Olympus OM-D E-M1 Mark III front
 
Sony Alpha A9 front
Portability
65
Imaging
73
Features
93
Overall
81

Olympus E-M1 III vs Sony A9 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
  • Announced February 2020
  • Older Model is Olympus E-M1 II
Sony A9
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 51200 (Bump to 204800)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 673g - 127 x 96 x 63mm
  • Released April 2017
  • Successor is Sony A9 II
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Olympus E-M1 III vs Sony A9 Overview

In this write-up, we will be matching up the Olympus E-M1 III and Sony A9, both Pro Mirrorless digital cameras by companies Olympus and Sony. The image resolution of the E-M1 III (20MP) and the A9 (24MP) is relatively well matched but the E-M1 III (Four Thirds) and A9 (Full frame) feature different sensor sizes.

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The E-M1 III was announced 2 years after the A9 which is quite a large gap as far as technology is concerned. Both cameras offer the identical body type (SLR-style mirrorless).

Before going straight into a step-by-step comparison, below is a brief introduction of how the E-M1 III matches up vs the A9 with respect to portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M1 III over the Sony A9

 E-M1 III A9 
ReleasedFebruary 2020April 2017Newer by 35 months
Screen typeFully ArticulatedTiltingFully Articulating screen
Selfie screen Easy selfies

Reasons to pick Sony A9 over the Olympus E-M1 III

 A9 E-M1 III 
Screen resolution1440k1037kCrisper screen (+403k dot)

Common features in the Olympus E-M1 III and Sony A9

 E-M1 III A9 
Manual focus More accurate focus
Screen sizing3"3"Equivalent screen dimensions
Touch friendly screen Quickly navigate

Olympus E-M1 III vs Sony A9 Physical Comparison

When you are aiming to travel with your camera, you should consider its weight and size. The Olympus E-M1 III offers external dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) while the Sony A9 has specifications of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") with a weight of 673 grams (1.48 lbs).

Analyze the Olympus E-M1 III and Sony A9 in the all new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an Interchangeable Lens Camera will differ depending on the lens you have chosen during that time. Here is the front view dimension comparison of the E-M1 III vs the A9.

Olympus E-M1 III vs Sony A9 size comparison

Using dimensions and weight, the portability score of the E-M1 III and A9 is 67 and 65 respectively.

Olympus E-M1 III vs Sony A9 top view buttons comparison

Olympus E-M1 III vs Sony A9 Sensor Comparison

Normally, it's tough to imagine the contrast between sensor dimensions merely by looking at specs. The pic underneath might provide you a more clear sense of the sensor sizes in the E-M1 III and A9.

All in all, both cameras offer different resolutions and different sensor dimensions. The E-M1 III with its tinier sensor is going to make achieving shallower depth of field more difficult and the Sony A9 will give you greater detail with its extra 4MP. Higher resolution can also make it easier to crop shots a little more aggressively. The younger E-M1 III should have a benefit when it comes to sensor tech.

Olympus E-M1 III vs Sony A9 sensor size comparison

Olympus E-M1 III vs Sony A9 Screen and ViewFinder

Olympus E-M1 III vs Sony A9 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M1 III Portrait photography factors
Sony A9 Portrait photography factors
77
manual focus
good MP (20MP)
sensor size is good (Four Thirds)
has face detection autofocus
saves RAW files
83
manual focus
megapixel count good (24 megapixels)
sensor size is big (Full frame)
supports face detect focusing
supports RAW formats
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Street Comparison

Olympus E-M1 III Street photography details
Sony A9 Street photography details
78
screen articulates
built in image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
saves RAW files
features focus via touch
weather sealing
above average high ISO (25,600)
79
has a tilting screen
image stabilization (Sensor based 5-axis)
sensor size is big (Full frame)
supports RAW formats
includes touch focus
environment sealing
very good high ISO (51,200)
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Sports Comparison

Sports photography with Olympus E-M1 III
Sports photography with Sony A9
81
max shutter speed is good (1/8,000 seconds)
quiet mode (1/32,000 seconds)
fast continuous shooting (60.0 frames per second)
built in image stabilization (Sensor based 5-axis)
good MP (20MP)
sensor size is good (Four Thirds)
has tracking autofocus
weather sealing
supports phase detect autofocus
86
high shutter speed (1/8,000 seconds)
quiet shutter (1/32,000 seconds)
max fps high (20.0 frames/s)
image stabilization (Sensor based 5-axis)
megapixel count good (24 megapixels)
sensor size is big (Full frame)
supports tracking focus
environment sealing
good battery pack (650 shots)
has phase detect AF
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Travel Comparison

Travel photography with Olympus E-M1 III
Travel photography with Sony A9
79
weather sealing
has bluetooth
features focus via touch
good MP (20MP)
selfie friendly screen
73
good battery pack (650 CIPA)
environment sealing
supports bluetooth
includes touch focus
megapixel count good (24 megapixels)
does not contain selfie friendly display
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Landscape Comparison

Olympus E-M1 III Landscape photography factors
Sony A9 Landscape photography factors
81
manual focus
switch lenses (Micro Four Thirds mount)
screen is a good size (3 inch)
built in image stabilization (Sensor based 5-axis)
good MP (20 megapixels)
sensor size is good (Four Thirds)
doesnt have low pass filter
above average high ISO (25,600)
saves RAW files
weather sealing
two card slots
85
manual focus
switch lenses (Sony E mount)
screen is a good size (3 inch)
image stabilization (Sensor based 5-axis)
megapixel count good (24MP)
sensor size is big (Full frame)
very good high ISO (51,200)
supports RAW formats
environment sealing
good battery pack (650 per charge)
has double storage slots
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Vlogging Comparison

Olympus E-M1 III Vlogging factors
Sony A9 Vlogging factors
79
selfie friendly screen
touchscreen
built in image stabilization (Sensor based 5-axis)
has face detection autofocus
video resolution high (4096 x 2160 pixels)
comes with external mic socket
36
built-in touchscreen
image stabilization (Sensor based 5-axis)
supports face detect focusing
high quality video (3840 x 2160 pxls)
has microphone port
does not contain selfie friendly display
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Olympus E-M1 III vs Sony A9 Specifications

Detailed spec comparison table for Olympus E-M1 III and Sony A9
 Olympus OM-D E-M1 Mark IIISony Alpha A9
General Information
Brand Name Olympus Sony
Model type Olympus OM-D E-M1 Mark III Sony Alpha A9
Class Pro Mirrorless Pro Mirrorless
Announced 2020-02-11 2017-04-19
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Processor TruePic IX BIONZ X
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor measurements 17.4 x 13mm 35.6 x 23.8mm
Sensor surface area 226.2mm² 847.3mm²
Sensor resolution 20MP 24MP
Anti alias filter
Aspect ratio 4:3 3:2 and 16:9
Max resolution 5184 x 3888 6000 x 4000
Max native ISO 25600 51200
Max enhanced ISO - 204800
Lowest native ISO 200 100
RAW photos
Lowest enhanced ISO 64 50
Autofocusing
Manual focusing
AF touch
AF continuous
Single AF
AF tracking
AF selectice
Center weighted AF
Multi area AF
Live view AF
Face detect AF
Contract detect AF
Phase detect AF
Total focus points 121 693
Cross type focus points 121 -
Lens
Lens support Micro Four Thirds Sony E
Available lenses 107 121
Focal length multiplier 2.1 1
Screen
Display type Fully Articulated Tilting
Display size 3 inch 3 inch
Display resolution 1,037k dot 1,440k dot
Selfie friendly
Liveview
Touch screen
Viewfinder Information
Viewfinder type Electronic Electronic
Viewfinder resolution 2,360k dot 3,686k dot
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.74x 0.78x
Features
Min shutter speed 60s 30s
Max shutter speed 1/8000s 1/8000s
Max quiet shutter speed 1/32000s 1/32000s
Continuous shutter speed 60.0 frames/s 20.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set WB
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 Flash off, Autoflash, Fill-flash, Slow Sync., Rear Sync., Red-eye reduction, Wireless, Hi-speed sync
Hot shoe
Auto exposure bracketing
WB bracketing
Max flash sync 1/250s -
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported 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 -
Max video resolution 4096x2160 3840x2160
Video format MPEG-4, H.264 MPEG-4, AVCHD, H.264
Microphone jack
Headphone jack
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
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 580 grams (1.28 lb) 673 grams (1.48 lb)
Dimensions 134 x 91 x 69mm (5.3" x 3.6" x 2.7") 127 x 96 x 63mm (5.0" x 3.8" x 2.5")
DXO scores
DXO Overall rating not tested 92
DXO Color Depth rating not tested 24.9
DXO Dynamic range rating not tested 13.3
DXO Low light rating not tested 3517
Other
Battery life 420 shots 650 shots
Style of battery Battery Pack Battery Pack
Battery ID BLH-1 NP-FZ100
Self timer Yes (2 or 12 secs, custom) Yes (2, 5, 10 secs + continuous)
Time lapse feature
Storage media Dual SD/SDHC/SDXC slots (UHS-II on first slot) Dual SD/SDHC/SDXC slots (UHS-II compatible)
Storage slots 2 2
Cost at release $1,800 $4,498