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OM System OM-5 vs Sony A9 II

Portability
80
Imaging
64
Features
88
Overall
73
OM System OM-5 front
 
Sony Alpha A9 Mark II front
Portability
62
Imaging
76
Features
93
Overall
82

OM System OM-5 vs Sony A9 II Key Specs

OM System OM-5
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3.00" Fully Articulated Screen
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 414g - 125 x 85 x 50mm
  • Introduced October 2022
  • Earlier Model is Olympus E-M5 III
Sony A9 II
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Tilting Display
  • ISO 100 - 51200 (Increase to 204800)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 678g - 129 x 96 x 76mm
  • Launched October 2019
  • Superseded the Sony A9
Photography Glossary

OM System OM-5 vs Sony A9 II Overview

Let's look a little more closely at the OM System OM-5 versus Sony A9 II, former being a Advanced Mirrorless while the other is a Pro Mirrorless by competitors Olympus and Sony. The resolution of the OM System OM-5 (20MP) and the A9 II (24MP) is very well matched but the OM System OM-5 (Four Thirds) and A9 II (Full frame) offer different sensor size.

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The OM System OM-5 was launched 3 years later than the A9 II and that is quite a big difference as far as tech is concerned. The two cameras have the same body design (SLR-style mirrorless).

Before going into a step-by-step comparison, here is a simple view of how the OM System OM-5 grades vs the A9 II with respect to portability, imaging, features and an overall grade.

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Reasons to pick OM System OM-5 over the Sony A9 II

 OM System OM-5 A9 II 
LaunchedOctober 2022October 2019More recent by 38 months
Display typeFully ArticulatedTiltingFully Articulating display
Selfie screen Take selfies

Reasons to pick Sony A9 II over the OM System OM-5

 A9 II OM System OM-5 
Display resolution1440k1040kClearer display (+400k dot)

Common features in the OM System OM-5 and Sony A9 II

 OM System OM-5 A9 II 
Manual focus More accurate focusing
Display dimensions3.00"3"Equal display size
Touch friendly display Easily navigate

OM System OM-5 vs Sony A9 II Physical Comparison

If you're planning to lug around your camera, you will need to consider its weight and dimensions. The OM System OM-5 has got outer measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") having a weight of 414 grams (0.91 lbs) and the Sony A9 II has dimensions of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") accompanied by a weight of 678 grams (1.49 lbs).

Contrast the OM System OM-5 versus Sony A9 II in our completely new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an ILC will vary dependant on the lens you select at that time. Below is a front view over all size comparison of the OM System OM-5 vs the A9 II.

OM System OM-5 vs Sony A9 II size comparison

Taking into account size and weight, the portability rating of the OM System OM-5 and A9 II is 80 and 62 respectively.

OM System OM-5 vs Sony A9 II top view buttons comparison

OM System OM-5 vs Sony A9 II Sensor Comparison

Oftentimes, it is difficult to picture the difference between sensor measurements simply by looking at a spec sheet. The photograph here may offer you a better sense of the sensor sizing in the OM System OM-5 and A9 II.

Clearly, both of those cameras provide different resolutions and different sensor measurements. The OM System OM-5 because of its tinier sensor is going to make achieving bokeh tougher and the Sony A9 II will resolve extra detail utilizing its extra 4 Megapixels. Greater resolution can also make it easier to crop photos more aggressively. The fresher OM System OM-5 should have an advantage with regard to sensor tech.

OM System OM-5 vs Sony A9 II sensor size comparison

OM System OM-5 vs Sony A9 II Screen and ViewFinder

OM System OM-5 vs Sony A9 II Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

OM System OM-5 Portrait photography factors
Sony A9 II Portrait photography factors
78
manual focus
megapixel count good (20MP)
sensor size is good (Four Thirds)
has face detection focus
supports RAW files
85
has manual focus
MP count decent (24MP)
sensor size is great (Full frame)
features face detect focusing
supports RAW formats
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Street Comparison

OM System OM-5 as a Street photography camera
Sony A9 II as a Street photography camera
84
screen articulates fully
built in image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
supports RAW files
comes with focus via touch
weather proofing
above average high ISO (25,600)
78
screen tilts
built in image stabilization (Sensor based 5-axis)
sensor size is great (Full frame)
supports RAW formats
boasts focus via touch
weather proofing
good high ISO (51,200)
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Sports Comparison

OM System OM-5 Sports photography highlights
Sony A9 II Sports photography highlights
76
high shutter speed (1/8,000s)
quiet shutter (1/32,000s)
built in image stabilization (Sensor based 5-axis)
megapixel count good (20 megapixels)
sensor size is good (Four Thirds)
has tracking autofocus
weather proofing
comes with phase detect auto focus
terrible battery pack (310 per charge)
88
maximum shutter speed is high (1/8,000s)
silent shutter (1/32,000s)
high max frames per second (20.0 fps)
built in image stabilization (Sensor based 5-axis)
MP count decent (24 megapixels)
sensor size is great (Full frame)
features tracking focus
weather proofing
better than average battery pack (690 shots)
sensor has phase detect AF
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Travel Comparison

OM System OM-5 as a Travel photography camera
Sony A9 II as a Travel photography camera
78
weather proofing
connects via bluetooth
comes with focus via touch
megapixel count good (20MP)
selfie friendly screen
terrible battery pack (310 CIPA)
73
better than average battery pack (690 shots)
weather proofing
supports bluetooth
boasts focus via touch
MP count decent (24 megapixels)
does not contain selfie friendly screen
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Landscape Comparison

Landscape photography with OM System OM-5
Landscape photography with Sony A9 II
78
manual focus
switch lenses (Micro Four Thirds mount)
good sized screen (3.00")
built in image stabilization (Sensor based 5-axis)
megapixel count good (20MP)
sensor size is good (Four Thirds)
above average high ISO (25,600)
supports RAW files
weather proofing
terrible battery pack (310 per charge)
86
has manual focus
swap lenses (Sony E mount)
pretty good screen size (3 inch)
built in image stabilization (Sensor based 5-axis)
MP count decent (24MP)
sensor size is great (Full frame)
good high ISO (51,200)
supports RAW formats
weather proofing
better than average battery pack (690 shots)
has dual storage slots
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Vlogging Comparison

OM System OM-5 Vlogging highlights
Sony A9 II Vlogging highlights
84
selfie friendly screen
touch screen
built in image stabilization (Sensor based 5-axis)
has face detection focus
video resolution high (4096 x 2160 pixels)
does have external microphone socket
36
touch screen
built in image stabilization (Sensor based 5-axis)
features face detect focusing
video res high (3840 x 2160 pxls)
includes mic jack
does not contain selfie friendly screen
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OM System OM-5 vs Sony A9 II Specifications

Detailed spec comparison table for OM System OM-5 and Sony A9 II
 OM System OM-5Sony Alpha A9 Mark II
General Information
Brand Name Olympus Sony
Model type OM System OM-5 Sony Alpha A9 Mark II
Class Advanced Mirrorless Pro Mirrorless
Introduced 2022-10-26 2019-10-03
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Processor - 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 20 megapixels 24 megapixels
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Highest Possible resolution 5184 x 3888 6000 x 4000
Maximum native ISO 25600 51200
Maximum enhanced ISO - 204800
Minimum native ISO 200 100
RAW support
Minimum enhanced ISO 64 50
Autofocusing
Manual focusing
Touch focus
Continuous AF
Single AF
Tracking AF
Selective AF
AF center weighted
AF multi area
AF live view
Face detection AF
Contract detection AF
Phase detection AF
Total focus points 121 693
Lens
Lens mount type Micro Four Thirds Sony E
Available lenses 119 121
Crop factor 2.1 1
Screen
Range of screen Fully Articulated Tilting
Screen size 3.00" 3"
Resolution of screen 1,040k dot 1,440k dot
Selfie friendly
Liveview
Touch operation
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 2,360k dot 3,686k dot
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.68x 0.78x
Features
Min shutter speed 60 secs 30 secs
Max shutter speed 1/8000 secs 1/8000 secs
Max silent shutter speed 1/32000 secs 1/32000 secs
Continuous shutter speed 10.0 frames/s 20.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set WB
Image stabilization
Integrated flash
Flash distance no built-in flash no built-in flash
Flash modes Auto, redeye, fill, off, redeye slow sync, slow sync, 2nd-curtain slow sync, 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 1/250 secs -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM 3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
Maximum video resolution 4096x2160 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 414g (0.91 lbs) 678g (1.49 lbs)
Physical dimensions 125 x 85 x 50mm (4.9" x 3.3" x 2.0") 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 310 photos 690 photos
Style of battery Battery Pack Battery Pack
Battery ID BLS-50 NP-FZ100
Self timer Yes (2 or 10 secs, custom) Yes (2, 5, 10 secs + continuous, 3 or 5 frames)
Time lapse shooting
Storage media SD/SDHC/SDXC (UHS-II supported) Dual SD/SDHC/SDXC slots (UHS-II compatible)
Storage slots One Dual
Cost at release $1,200 $4,498