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Olympus E-M10 IV vs Sony A9 II

Portability
81
Imaging
62
Features
83
Overall
70
Olympus OM-D E-M10 IV front
 
Sony Alpha A9 Mark II front
Portability
62
Imaging
75
Features
93
Overall
82

Olympus E-M10 IV vs Sony A9 II Key Specs

Olympus E-M10 IV
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Micro Four Thirds Mount
  • 383g - 122 x 84 x 49mm
  • Revealed August 2020
  • Older Model is Olympus E-M10 III
Sony A9 II
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 51200 (Expand to 204800)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 678g - 129 x 96 x 76mm
  • Launched October 2019
  • Older Model is Sony A9
Photography Glossary

Olympus E-M10 IV vs Sony A9 II Overview

Let's examine more closely at the Olympus E-M10 IV versus Sony A9 II, one being a Entry-Level Mirrorless and the latter is a Pro Mirrorless by rivals Olympus and Sony. The resolution of the E-M10 IV (20MP) and the A9 II (24MP) is relatively well matched but the E-M10 IV (Four Thirds) and A9 II (Full frame) use different sensor sizes.

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The E-M10 IV was introduced 11 months later than the A9 II so they are both of a similar generation. Both of the cameras come with the identical body type (SLR-style mirrorless).

Before diving through a in-depth comparison, below is a concise view of how the E-M10 IV scores vs the A9 II with respect to portability, imaging, features and an overall rating.

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Reasons to pick Olympus E-M10 IV over the Sony A9 II

 E-M10 IV A9 II 
LaunchedAugust 2020October 2019Fresher by 11 months
Selfie screen Easy selfies

Reasons to pick Sony A9 II over the Olympus E-M10 IV

 A9 II E-M10 IV 
Screen resolution1440k1040kSharper screen (+400k dot)

Common features in the Olympus E-M10 IV and Sony A9 II

 E-M10 IV A9 II 
Manually focus Dial exact focus
Screen typeTiltingTiltingTilting screen
Screen dimension3"3"Identical screen dimensions
Touch screen Quickly navigate

Olympus E-M10 IV vs Sony A9 II Physical Comparison

For anybody who is aiming to carry your camera regularly, you will need to think about its weight and measurements. The Olympus E-M10 IV comes with physical measurements of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") accompanied by a weight of 383 grams (0.84 lbs) and the Sony A9 II has proportions of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") with a weight of 678 grams (1.49 lbs).

Check the Olympus E-M10 IV versus Sony A9 II in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will differ dependant on the lens you use at that time. Here is the front view overall size comparison of the E-M10 IV vs the A9 II.

Olympus E-M10 IV vs Sony A9 II size comparison

Using size and weight, the portability rating of the E-M10 IV and A9 II is 81 and 62 respectively.

Olympus E-M10 IV vs Sony A9 II top view buttons comparison

Olympus E-M10 IV vs Sony A9 II Sensor Comparison

Usually, its difficult to imagine the contrast between sensor sizing simply by reading through technical specs. The visual below will help provide you a stronger sense of the sensor measurements in the E-M10 IV and A9 II.

As you can tell, each of these cameras posses different resolutions and different sensor sizing. The E-M10 IV with its tinier sensor is going to make achieving shallow depth of field tougher and the Sony A9 II will give more detail using its extra 4MP. Higher resolution will also let you crop pictures somewhat more aggressively. The newer E-M10 IV should have an advantage in sensor technology.

Olympus E-M10 IV vs Sony A9 II sensor size comparison

Olympus E-M10 IV vs Sony A9 II Screen and ViewFinder

Olympus E-M10 IV vs Sony A9 II Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 IV as a Portrait photography camera
Sony A9 II as a Portrait photography camera
77
manual focus
decent megapixels (20 megapixels)
sensor size is nice (Four Thirds)
features face detection focusing
exports RAW files
85
focusing manually
MP count good (24MP)
large sensor size (Full frame)
has face detect focusing
supports RAW formats
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Street Comparison

Olympus E-M10 IV Street photography information
Sony A9 II Street photography information
84
screen tilts
built in image stabilization (Sensor based 5-axis)
sensor size is nice (Four Thirds)
exports RAW files
comes with focus via touch
above average ISO range (25,600)
78
has a tilting screen
image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
supports RAW formats
offers touch focus
weather proofing
good high ISO (51,200)
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Sports Comparison

Sports photography with Olympus E-M10 IV
Sports photography with Sony A9 II
72
silent shutter (1/16,000 seconds)
built in image stabilization (Sensor based 5-axis)
decent megapixels (20 megapixels)
sensor size is nice (Four Thirds)
features tracking autofocus
has no phase detect AF
87
high shutter speed (1/8,000 seconds)
quiet shooting (1/32,000 seconds)
high max frames per second (20.0 fps)
image stabilization (Sensor based 5-axis)
MP count good (24 megapixels)
large sensor size (Full frame)
has tracking focus
weather proofing
better than average battery pack (690 shots)
sensor has phase detect AF
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Travel Comparison

Travel photography with Olympus E-M10 IV
Travel photography with Sony A9 II
84
supports bluetooth
comes with focus via touch
decent megapixels (20 megapixels)
built-in flash
display is selfie friendly
73
better than average battery pack (690 shots)
weather proofing
connects via bluetooth
offers touch focus
MP count good (24MP)
display is not selfie friendly
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Landscape Comparison

Olympus E-M10 IV Landscape photography details
Sony A9 II Landscape photography details
82
manual focus
swap lenses (Micro Four Thirds mount)
decent sized screen (3")
built in image stabilization (Sensor based 5-axis)
decent megapixels (20 megapixels)
sensor size is nice (Four Thirds)
above average ISO range (25,600)
exports RAW files
86
focusing manually
switch lenses (Sony E mount)
pretty good screen size (3")
image stabilization (Sensor based 5-axis)
MP count good (24 megapixels)
large sensor size (Full frame)
good high ISO (51,200)
supports RAW formats
weather proofing
better than average battery pack (690 CIPA)
has dual storage slots
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Vlogging Comparison

Olympus E-M10 IV as a Vlogging camera
Sony A9 II as a Vlogging camera
78
display is selfie friendly
has touchscreen
built in image stabilization (Sensor based 5-axis)
features face detection focusing
high quality video (3840 x 2160 pixels)
no external microphone socket
36
touchscreen capability
image stabilization (Sensor based 5-axis)
has face detect focusing
video res high (3840 x 2160 pxls)
includes mic jack
display is not selfie friendly
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Olympus E-M10 IV vs Sony A9 II Specifications

Detailed spec comparison table for Olympus E-M10 IV and Sony A9 II
 Olympus OM-D E-M10 IVSony Alpha A9 Mark II
General Information
Make Olympus Sony
Model type Olympus OM-D E-M10 IV Sony Alpha A9 Mark II
Class Entry-Level Mirrorless Pro Mirrorless
Revealed 2020-08-04 2019-10-03
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Processor TruePic VIII BIONZ X
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor dimensions 17.4 x 13mm 35.6 x 23.8mm
Sensor area 226.2mm² 847.3mm²
Sensor resolution 20MP 24MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Max resolution 5184 x 3888 6000 x 4000
Max native ISO 25600 51200
Max enhanced ISO - 204800
Minimum native ISO 200 100
RAW support
Minimum enhanced ISO 100 50
Autofocusing
Focus manually
AF touch
Continuous AF
Single AF
Tracking AF
Selective AF
Center weighted AF
AF multi area
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Total focus points 121 693
Lens
Lens support Micro Four Thirds Sony E
Available lenses 107 121
Crop factor 2.1 1
Screen
Range of display Tilting Tilting
Display sizing 3 inch 3 inch
Display resolution 1,040 thousand dot 1,440 thousand dot
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder type Electronic Electronic
Viewfinder resolution 2,360 thousand dot 3,686 thousand dot
Viewfinder coverage 100% 100%
Viewfinder magnification 0.62x 0.78x
Features
Min shutter speed 60s 30s
Max shutter speed 1/4000s 1/8000s
Max quiet shutter speed 1/16000s 1/32000s
Continuous shutter speed 8.7 frames/s 20.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom WB
Image stabilization
Built-in flash
Flash distance 7.20 m (at ISO 200) no built-in flash
Flash options Redeye, fill-in, off, redeye 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
AEB
White balance bracketing
Max flash sync 1/250s -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 25p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 24p / 102 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 60p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 50p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 30p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 25p / 52 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 24p / 52 Mbps, MOV, H.264, Linear PCM 3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
Max video resolution 3840x2160 3840x2160
Video file format MPEG-4, H.264 MPEG-4, AVCHD, H.264
Mic input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.1 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 383 grams (0.84 pounds) 678 grams (1.49 pounds)
Dimensions 122 x 84 x 49mm (4.8" x 3.3" x 1.9") 129 x 96 x 76mm (5.1" x 3.8" x 3.0")
DXO scores
DXO Overall rating not tested not tested
DXO Color Depth rating not tested not tested
DXO Dynamic range rating not tested not tested
DXO Low light rating not tested not tested
Other
Battery life 360 shots 690 shots
Battery format Battery Pack Battery Pack
Battery ID BLS-50 NP-FZ100
Self timer Yes (2 or 12 sec, custom) Yes (2, 5, 10 secs + continuous, 3 or 5 frames)
Time lapse feature
Type of storage SD/SDHC/SDXC (UHS-II supported) Dual SD/SDHC/SDXC slots (UHS-II compatible)
Storage slots Single Dual
Cost at release $699 $4,498