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Olympus E-M10 III vs Sony A7c

Portability
80
Imaging
55
Features
75
Overall
63
Olympus OM-D E-M10 Mark III front
 
Sony Alpha A7c front
Portability
78
Imaging
77
Features
88
Overall
81

Olympus E-M10 III vs Sony A7c Key Specs

Olympus E-M10 III
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Screen
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Micro Four Thirds Mount
  • 410g - 122 x 84 x 50mm
  • Launched August 2017
  • Older Model is Olympus E-M10 II
  • Successor is Olympus E-M10 IV
Sony A7c
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Fully Articulated Screen
  • ISO 100 - 51200 (Increase to 204800)
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Sony E Mount
  • 509g - 124 x 71 x 60mm
  • Announced September 2020
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Olympus E-M10 III vs Sony A7c Overview

Below is a in-depth comparison of the Olympus E-M10 III versus Sony A7c, one being a Entry-Level Mirrorless and the latter is a Advanced Mirrorless by manufacturers Olympus and Sony. There is a crucial difference between the sensor resolutions of the E-M10 III (16MP) and A7c (24MP) and the E-M10 III (Four Thirds) and A7c (Full frame) come with totally different sensor measurements.

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The E-M10 III was introduced 4 years before the A7c and that is quite a serious gap as far as tech is concerned. Both of these cameras offer different body type with the Olympus E-M10 III being a SLR-style mirrorless camera and the Sony A7c being a Rangefinder-style mirrorless camera.

Before diving through a more detailed comparison, below is a short introduction of how the E-M10 III scores vs the A7c when considering portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-M10 III over the Sony A7c

 E-M10 III A7c 
Screen resolution1040k922kSharper screen (+118k dot)

Reasons to pick Sony A7c over the Olympus E-M10 III

 A7c E-M10 III 
AnnouncedSeptember 2020August 2017More recent by 37 months
Screen typeFully articulatedTiltingFully Articulating screen
Selfie screen Easy selfies

Common features in the Olympus E-M10 III and Sony A7c

 E-M10 III A7c 
Focus manually Very accurate focus
Screen sizing3"3"Equivalent screen measurements
Touch friendly screen Quickly navigate

Olympus E-M10 III vs Sony A7c Physical Comparison

When you are aiming to lug around your camera often, you will need to think about its weight and measurements. The Olympus E-M10 III provides outer dimensions of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") accompanied by a weight of 410 grams (0.90 lbs) while the Sony A7c has proportions of 124mm x 71mm x 60mm (4.9" x 2.8" x 2.4") along with a weight of 509 grams (1.12 lbs).

Examine the Olympus E-M10 III versus Sony A7c in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will change dependant on the lens you are using at the time. Underneath is the front view scale comparison of the E-M10 III and the A7c.

Olympus E-M10 III vs Sony A7c size comparison

Taking into account size and weight, the portability rating of the E-M10 III and A7c is 80 and 78 respectively.

Olympus E-M10 III vs Sony A7c top view buttons comparison

Olympus E-M10 III vs Sony A7c Sensor Comparison

Generally, its difficult to visualise the contrast between sensor measurements purely by reviewing specs. The photograph underneath will provide you a far better sense of the sensor sizes in the E-M10 III and A7c.

As you can plainly see, both of those cameras enjoy different megapixel count and different sensor measurements. The E-M10 III having a tinier sensor will make achieving shallower depth of field harder and the Sony A7c will deliver more detail using its extra 8 Megapixels. Higher resolution can also make it easier to crop pictures far more aggressively. The older E-M10 III is going to be disadvantaged with regard to sensor innovation.

Olympus E-M10 III vs Sony A7c sensor size comparison

Olympus E-M10 III vs Sony A7c Screen and ViewFinder

Olympus E-M10 III vs Sony A7c Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 III Portrait photography features
Sony A7c Portrait photography features
73
has manual focus
sensor resolution is decent (16MP)
sensor size is good (Four Thirds)
offers face detect focusing
exports RAW formats
79
focusing manually
sensor resolution is decent (24MP)
sensor size is big (Full frame)
offers face detect focusing
saves RAW formats
cannot use external flash
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Street Comparison

Olympus E-M10 III Street photography features
Sony A7c Street photography features
77
tilting screen
built in image stabilization (Sensor based 5-axis)
sensor size is good (Four Thirds)
exports RAW formats
features focus by touch
above average high ISO (25,600)
more heavy than average in class (410g)
85
image stabilization (Sensor based 5-axis)
sensor size is big (Full frame)
saves RAW formats
features focus by touch
weather sealing
good ISO range (51,200)
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Sports Comparison

Olympus E-M10 III Sports photography information
Sony A7c Sports photography information
69
silent shooting (1/16,000s)
built in image stabilization (Sensor based 5-axis)
sensor resolution is decent (16MP)
sensor size is good (Four Thirds)
offers tracking focus
lack of phase detect AF
88
silent mode (1/8,000 seconds)
image stabilization (Sensor based 5-axis)
sensor resolution is decent (24 megapixels)
sensor size is big (Full frame)
offers tracking focus
weather sealing
good battery (740 shots)
supports phase detect AF
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Travel Comparison

Olympus E-M10 III Travel photography information
Sony A7c Travel photography information
67
features focus by touch
sensor resolution is decent (16MP)
flash built-in
more heavy than average in class (410g)
screen is not selfie friendly
86
good battery (740 CIPA)
weather sealing
connects via bluetooth
features focus by touch
sensor resolution is decent (24MP)
display is selfie friendly
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Landscape Comparison

Olympus E-M10 III Landscape photography information
Sony A7c Landscape photography information
80
has manual focus
swap lenses (Micro Four Thirds mount)
screen size is good (3 inch)
built in image stabilization (Sensor based 5-axis)
sensor resolution is decent (16 megapixels)
sensor size is good (Four Thirds)
above average high ISO (25,600)
exports RAW formats
88
focusing manually
change lenses (Sony E mount)
decent sized screen (3 inch)
image stabilization (Sensor based 5-axis)
sensor resolution is decent (24MP)
sensor size is big (Full frame)
good ISO range (51,200)
saves RAW formats
weather sealing
good battery (740 per charge)
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Vlogging Comparison

Vlogging with Olympus E-M10 III
Vlogging with Sony A7c
32
touchscreen
built in image stabilization (Sensor based 5-axis)
offers face detect focusing
video res high (3840 x 2160 pxls)
screen is not selfie friendly
missing microphone socket
more heavy than average in class (410g)
86
display is selfie friendly
screen is touchscreen
image stabilization (Sensor based 5-axis)
offers face detect focusing
video res high (3840 x 2160 resolution)
comes with microphone jack
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Olympus E-M10 III vs Sony A7c Specifications

Detailed spec comparison table for Olympus E-M10 III and Sony A7c
 Olympus OM-D E-M10 Mark IIISony Alpha A7c
General Information
Make Olympus Sony
Model type Olympus OM-D E-M10 Mark III Sony Alpha A7c
Category Entry-Level Mirrorless Advanced Mirrorless
Launched 2017-08-31 2020-09-14
Body design SLR-style mirrorless Rangefinder-style mirrorless
Sensor Information
Processor Chip TruePic VIII -
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor measurements 17.4 x 13mm 35.8 x 23.8mm
Sensor area 226.2mm² 852.0mm²
Sensor resolution 16 megapixels 24 megapixels
Anti alias filter
Aspect ratio 4:3 3:2 and 16:9
Full resolution 4608 x 3456 6000 x 4000
Max native ISO 25600 51200
Max boosted ISO - 204800
Lowest native ISO 200 100
RAW data
Lowest boosted ISO 100 50
Autofocusing
Manual focusing
Touch to focus
Autofocus continuous
Single autofocus
Tracking autofocus
Selective autofocus
Autofocus center weighted
Multi area autofocus
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 121 693
Lens
Lens support Micro Four Thirds Sony E
Total lenses 107 122
Crop factor 2.1 1
Screen
Range of screen Tilting Fully articulated
Screen diagonal 3" 3"
Resolution of screen 1,040 thousand dot 922 thousand dot
Selfie friendly
Liveview
Touch operation
Viewfinder Information
Viewfinder type Electronic Electronic
Viewfinder resolution 2,360 thousand dot 2,360 thousand dot
Viewfinder coverage 100% 100%
Viewfinder magnification 0.62x 0.59x
Features
Slowest shutter speed 60 secs 30 secs
Maximum shutter speed 1/4000 secs 1/4000 secs
Maximum silent shutter speed 1/16000 secs 1/8000 secs
Continuous shooting speed 8.6fps 10.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash distance 5.80 m (at ISO 100) no built-in flash
Flash options Auto, redeye, slow sync, 2nd-curtain slow sync, redeye slow sync, fill-in, manual, off no built-in flash
External flash
Auto exposure bracketing
WB bracketing
Maximum 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 3840 x 2160 @ 30p / 102 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 format MPEG-4, H.264 MPEG-4, XAVC S, H.264
Microphone 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
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 410 grams (0.90 pounds) 509 grams (1.12 pounds)
Dimensions 122 x 84 x 50mm (4.8" x 3.3" x 2.0") 124 x 71 x 60mm (4.9" x 2.8" x 2.4")
DXO scores
DXO All around 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 330 photographs 740 photographs
Battery format Battery Pack Battery Pack
Battery ID BLS-50 NP-FZ100
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse recording
Storage media SD/SDHC/SDXC (UHS-I/II supported) SD/SDHC/SDXC card (UHS-II supported)
Storage slots 1 1
Launch pricing $650 $1,800