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OM System OM-5 vs Sony A7c

Portability
80
Imaging
64
Features
88
Overall
73
OM System OM-5 front
 
Sony Alpha A7c front
Portability
78
Imaging
76
Features
88
Overall
80

OM System OM-5 vs Sony A7c 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 Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 414g - 125 x 85 x 50mm
  • Released October 2022
  • Succeeded the Olympus E-M5 III
Sony A7c
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Fully Articulated Display
  • ISO 100 - 51200 (Push to 204800)
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Sony E Mount
  • 509g - 124 x 71 x 60mm
  • Released September 2020
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OM System OM-5 vs Sony A7c Overview

On this page, we are reviewing the OM System OM-5 vs Sony A7c, both Advanced Mirrorless digital cameras by competitors Olympus and Sony. The resolution of the OM System OM-5 (20MP) and the A7c (24MP) is very similar but the OM System OM-5 (Four Thirds) and A7c (Full frame) provide different sensor size.

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The OM System OM-5 was manufactured 2 years after the A7c which is quite a large gap as far as tech is concerned. Each of these cameras have different body design with the OM System OM-5 being a SLR-style mirrorless camera and the Sony A7c being a Rangefinder-style mirrorless camera.

Before diving right into a complete comparison, here is a quick summary of how the OM System OM-5 grades vs the A7c when it comes to portability, imaging, features and an overall mark.

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Reasons to pick OM System OM-5 over the Sony A7c

 OM System OM-5 A7c 
ReleasedOctober 2022September 2020Newer by 26 months
Display resolution1040k922kClearer display (+118k dot)

Reasons to pick Sony A7c over the OM System OM-5

 A7c OM System OM-5 

Common features in the OM System OM-5 and Sony A7c

 OM System OM-5 A7c 
Manual focus More exact focusing
Display typeFully ArticulatedFully articulatedFully Articulated display
Display dimensions3.00"3"Equal display size
Selfie screen Both good for selfies
Touch friendly display Easily navigate

OM System OM-5 vs Sony A7c Physical Comparison

If you're looking to travel with your camera, you have to factor in its weight and proportions. The OM System OM-5 provides outside dimensions of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") and a weight of 414 grams (0.91 lbs) and the Sony A7c has measurements of 124mm x 71mm x 60mm (4.9" x 2.8" x 2.4") along with a weight of 509 grams (1.12 lbs).

Contrast the OM System OM-5 vs Sony A7c in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an Interchangeable Lens Camera will change based on the lens you have attached at that moment. The following is a front view proportions comparison of the OM System OM-5 and the A7c.

OM System OM-5 vs Sony A7c size comparison

Considering size and weight, the portability grade of the OM System OM-5 and A7c is 80 and 78 respectively.

OM System OM-5 vs Sony A7c top view buttons comparison

OM System OM-5 vs Sony A7c Sensor Comparison

Oftentimes, it is very hard to visualize the contrast between sensor dimensions purely by reviewing a spec sheet. The pic below will help give you a greater sense of the sensor sizes in the OM System OM-5 and A7c.

As you can see, the two cameras provide different megapixel count and different sensor dimensions. The OM System OM-5 due to its tinier sensor is going to make shooting shallow DOF more difficult and the Sony A7c will deliver greater detail due to its extra 4 Megapixels. Greater resolution can also help you crop photos more aggressively. The newer OM System OM-5 provides a benefit in sensor technology.

OM System OM-5 vs Sony A7c sensor size comparison

OM System OM-5 vs Sony A7c Screen and ViewFinder

OM System OM-5 vs Sony A7c Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

OM System OM-5 Portrait photography details
Sony A7c Portrait photography details
78
focusing manually
MP count good (20 megapixels)
sensor size is good (Four Thirds)
offers face detect autofocus
supports RAW formats
78
has manual focus
MP count decent (24 megapixels)
sensor size is great (Full frame)
supports face detection focusing
delivers RAW formats
cannot use external flash
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Street Comparison

OM System OM-5 as a Street photography camera
Sony A7c as a Street photography camera
84
screen can move to multiple angles
image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
supports RAW formats
includes touch focus
weather proofing
very good ISO range (25,600)
85
image stabilization (Sensor based 5-axis)
sensor size is great (Full frame)
delivers RAW formats
has touch to focus
environment sealing
good high ISO (51,200)
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Sports Comparison

OM System OM-5 Sports photography advice
Sony A7c Sports photography advice
76
maximum shutter speed is high (1/8,000 seconds)
quiet shooting (1/32,000 seconds)
image stabilization (Sensor based 5-axis)
MP count good (20MP)
sensor size is good (Four Thirds)
offers tracking focus
weather proofing
has phase detect autofocus
terrible battery pack (310 CIPA)
88
silent shooting (1/8,000s)
image stabilization (Sensor based 5-axis)
MP count decent (24 megapixels)
sensor size is great (Full frame)
supports tracking autofocus
environment sealing
great battery life (740 per charge)
has phase detect AF
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Travel Comparison

Travel photography with OM System OM-5
Travel photography with Sony A7c
78
weather proofing
supports bluetooth
includes touch focus
MP count good (20 megapixels)
selfie friendly screen
terrible battery pack (310 CIPA)
86
great battery life (740 CIPA)
environment sealing
has bluetooth
has touch to focus
MP count decent (24 megapixels)
display is selfie friendly
Photography Glossary

Landscape Comparison

OM System OM-5 as a Landscape photography camera
Sony A7c as a Landscape photography camera
78
focusing manually
switch lenses (Micro Four Thirds mount)
nice screen size (3.00 inch)
image stabilization (Sensor based 5-axis)
MP count good (20MP)
sensor size is good (Four Thirds)
very good ISO range (25,600)
supports RAW formats
weather proofing
terrible battery pack (310 per charge)
88
has manual focus
swap lenses (Sony E mount)
screen is a decent size (3")
image stabilization (Sensor based 5-axis)
MP count decent (24 megapixels)
sensor size is great (Full frame)
good high ISO (51,200)
delivers RAW formats
environment sealing
great battery life (740 per charge)
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Vlogging Comparison

OM System OM-5 Vlogging factors
Sony A7c Vlogging factors
84
selfie friendly screen
touchscreen functionality
image stabilization (Sensor based 5-axis)
offers face detect autofocus
high res video (4096 x 2160 pixels)
has mic port
86
display is selfie friendly
touch screen
image stabilization (Sensor based 5-axis)
supports face detection focusing
video resolution high (3840 x 2160 pxls)
has external mic jack
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OM System OM-5 vs Sony A7c Specifications

Detailed spec comparison table for OM System OM-5 and Sony A7c
 OM System OM-5Sony Alpha A7c
General Information
Brand Name Olympus Sony
Model type OM System OM-5 Sony Alpha A7c
Class Advanced Mirrorless Advanced Mirrorless
Released 2022-10-26 2020-09-14
Body design SLR-style mirrorless Rangefinder-style mirrorless
Sensor Information
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor dimensions 17.4 x 13mm 35.8 x 23.8mm
Sensor surface area 226.2mm² 852.0mm²
Sensor resolution 20 megapixels 24 megapixels
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Highest Possible resolution 5184 x 3888 6000 x 4000
Maximum native ISO 25600 51200
Maximum enhanced ISO - 204800
Min native ISO 200 100
RAW format
Min enhanced ISO 64 50
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Autofocus single
Tracking autofocus
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Total focus points 121 693
Lens
Lens mount type Micro Four Thirds Sony E
Amount of lenses 119 122
Focal length multiplier 2.1 1
Screen
Range of screen Fully Articulated Fully articulated
Screen diagonal 3.00 inches 3 inches
Resolution of screen 1,040k dot 922k dot
Selfie friendly
Liveview
Touch capability
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 2,360k dot 2,360k dot
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.68x 0.59x
Features
Minimum shutter speed 60 secs 30 secs
Fastest shutter speed 1/8000 secs 1/4000 secs
Fastest silent shutter speed 1/32000 secs 1/8000 secs
Continuous shutter speed 10.0 frames/s 10.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash distance no built-in flash no built-in flash
Flash settings Auto, redeye, fill, off, redeye slow sync, slow sync, 2nd-curtain slow sync, manual no built-in flash
External flash
AE bracketing
White balance bracketing
Fastest flash sync 1/250 secs -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
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, XAVC S, H.264
Mic input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 414g (0.91 lb) 509g (1.12 lb)
Physical dimensions 125 x 85 x 50mm (4.9" x 3.3" x 2.0") 124 x 71 x 60mm (4.9" x 2.8" x 2.4")
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 pictures 740 pictures
Style of battery Battery Pack Battery Pack
Battery ID BLS-50 NP-FZ100
Self timer Yes (2 or 10 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting
Storage media SD/SDHC/SDXC (UHS-II supported) SD/SDHC/SDXC card (UHS-II supported)
Storage slots One One
Cost at release $1,200 $1,800