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Olympus E-M10 IV vs Sony A7R II

Portability
81
Imaging
63
Features
83
Overall
71
Olympus OM-D E-M10 IV front
 
Sony Alpha A7R II front
Portability
68
Imaging
76
Features
84
Overall
79

Olympus E-M10 IV vs Sony A7R II Key Specs

Olympus E-M10 IV
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Tilting Screen
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Micro Four Thirds Mount
  • 383g - 122 x 84 x 49mm
  • Announced August 2020
  • Succeeded the Olympus E-M10 III
Sony A7R II
(Full Review)
  • 42MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 25600 (Expand to 102400)
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 625g - 127 x 96 x 60mm
  • Released June 2015
  • Succeeded the Sony A7R
  • Replacement is Sony A7R III
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Olympus E-M10 IV vs Sony A7R II Overview

Below, we will be contrasting the Olympus E-M10 IV versus Sony A7R II, one being a Entry-Level Mirrorless and the latter is a Pro Mirrorless by companies Olympus and Sony. There is a huge difference among the sensor resolutions of the E-M10 IV (20MP) and A7R II (42MP) and the E-M10 IV (Four Thirds) and A7R II (Full frame) come with totally different sensor size.

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The E-M10 IV was unveiled 5 years later than the A7R II and that is a fairly significant gap as far as camera tech is concerned. Both the cameras come with the identical body type (SLR-style mirrorless).

Before we go in to a detailed comparison, below is a brief view of how the E-M10 IV matches up vs the A7R II in regards to portability, imaging, features and an overall rating.

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Reasons to pick Olympus E-M10 IV over the Sony A7R II

 E-M10 IV A7R II 
ReleasedAugust 2020June 2015Fresher by 63 months
Selfie screen Easy selfies
Touch screen Quickly navigate

Reasons to pick Sony A7R II over the Olympus E-M10 IV

 A7R II E-M10 IV 
Screen resolution1229k1040kCrisper screen (+189k dot)

Common features in the Olympus E-M10 IV and Sony A7R II

 E-M10 IV A7R II 
Focus manually More exact focus
Screen typeTiltingTiltingTilting screen
Screen dimension3"3"Identical screen size

Olympus E-M10 IV vs Sony A7R II Physical Comparison

For anybody who is planning to carry your camera frequently, you will need to factor in its weight and size. The Olympus E-M10 IV comes with exterior measurements of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") having a weight of 383 grams (0.84 lbs) whilst the Sony A7R II has specifications of 127mm x 96mm x 60mm (5.0" x 3.8" x 2.4") accompanied by a weight of 625 grams (1.38 lbs).

See the Olympus E-M10 IV versus Sony A7R II in the new Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an Interchangeable Lens Camera will differ depending on the lens you use at that time. Here is the front view dimensions comparison of the E-M10 IV and the A7R II.

Olympus E-M10 IV vs Sony A7R II size comparison

Considering size and weight, the portability grade of the E-M10 IV and A7R II is 81 and 68 respectively.

Olympus E-M10 IV vs Sony A7R II top view buttons comparison

Olympus E-M10 IV vs Sony A7R II Sensor Comparison

Oftentimes, it is difficult to see the gap in sensor sizing merely by seeing specifications. The visual here may offer you a better sense of the sensor measurements in the E-M10 IV and A7R II.

Plainly, both of these cameras have got different megapixel count and different sensor sizing. The E-M10 IV with its smaller sensor will make shooting shallow DOF tougher and the Sony A7R II will provide greater detail having an extra 22 Megapixels. Higher resolution can also let you crop photographs much more aggressively. The more recent E-M10 IV is going to have an edge when it comes to sensor technology.

Olympus E-M10 IV vs Sony A7R II sensor size comparison

Olympus E-M10 IV vs Sony A7R II Screen and ViewFinder

Olympus E-M10 IV vs Sony A7R II Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 IV as a Portrait photography camera
Sony A7R II as a Portrait photography camera
77
you can focus manually
megapixel count decent (20 megapixels)
decent sensor size (Four Thirds)
supports face detection autofocus
supports RAW formats
85
you can focus manually
MP count high (42MP)
big sensor size (Full frame)
supports face detection focus
saves RAW files
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Street Comparison

Olympus E-M10 IV Street photography highlights
Sony A7R II Street photography highlights
84
tilting screen
built in image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
supports RAW formats
offers focus by touch
good high ISO (25,600)
81
screen tilts
has image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
saves RAW files
weather proof
very good high ISO (25,600)
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Sports Comparison

Olympus E-M10 IV Sports photography info
Sony A7R II Sports photography info
73
silent shooting (1/16,000 seconds)
built in image stabilization (Sensor based 5-axis)
megapixel count decent (20 megapixels)
decent sensor size (Four Thirds)
supports tracking autofocus
does not have phase detect autofocus
76
great max shutter speed (1/8,000 seconds)
has image stabilization (Sensor based 5-axis)
MP count high (42 megapixels)
big sensor size (Full frame)
supports tracking autofocus
weather proof
sensor has phase detect auto focus
slow frames per second (5.0 frames per second)
low battery (290 CIPA)
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Travel Comparison

Olympus E-M10 IV Travel photography details
Sony A7R II Travel photography details
85
has bluetooth
offers focus by touch
megapixel count decent (20MP)
has built in flash
selfie friendly display
62
weather proof
MP count high (42MP)
low battery (290 shots)
doesn't feature selfie friendly screen
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Landscape Comparison

Olympus E-M10 IV Landscape photography factors
Sony A7R II Landscape photography factors
83
you can focus manually
swap lenses (Micro Four Thirds mount)
screen size is good (3 inches)
built in image stabilization (Sensor based 5-axis)
megapixel count decent (20 megapixels)
decent sensor size (Four Thirds)
good high ISO (25,600)
supports RAW formats
82
you can focus manually
change lenses (Sony E mount)
decent sized screen (3")
has image stabilization (Sensor based 5-axis)
MP count high (42 megapixels)
big sensor size (Full frame)
no anti aliasing filter
very good high ISO (25,600)
saves RAW files
weather proof
low battery (290 per charge)
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Vlogging Comparison

Olympus E-M10 IV as a Vlogging camera
Sony A7R II as a Vlogging camera
78
selfie friendly display
has touchscreen
built in image stabilization (Sensor based 5-axis)
supports face detection autofocus
great video quality (3840 x 2160 pixels)
no external microphone jack
37
has image stabilization (Sensor based 5-axis)
supports face detection focus
high res video (3840 x 2160 resolution)
includes external mic port
doesn't feature selfie friendly screen
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Olympus E-M10 IV vs Sony A7R II Specifications

Detailed spec comparison table for Olympus E-M10 IV and Sony A7R II
 Olympus OM-D E-M10 IVSony Alpha A7R II
General Information
Company Olympus Sony
Model Olympus OM-D E-M10 IV Sony Alpha A7R II
Class Entry-Level Mirrorless Pro Mirrorless
Announced 2020-08-04 2015-06-10
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Powered by TruePic VIII Bionz X
Sensor type CMOS BSI-CMOS
Sensor size Four Thirds Full frame
Sensor dimensions 17.4 x 13mm 35.9 x 24mm
Sensor area 226.2mm² 861.6mm²
Sensor resolution 20MP 42MP
Anti aliasing filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Maximum resolution 5184 x 3888 7974 x 5316
Maximum native ISO 25600 25600
Maximum boosted ISO - 102400
Minimum native ISO 200 100
RAW support
Minimum boosted ISO 100 50
Autofocusing
Manual focus
Touch focus
Continuous AF
AF single
Tracking AF
Selective AF
Center weighted AF
AF multi area
AF live view
Face detection focusing
Contract detection focusing
Phase detection focusing
Number of focus points 121 399
Lens
Lens mounting type Micro Four Thirds Sony E
Number of lenses 107 121
Crop factor 2.1 1
Screen
Screen type Tilting Tilting
Screen sizing 3" 3"
Resolution of screen 1,040k dot 1,229k dot
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 2,360k dot 2,359k dot
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.62x 0.78x
Features
Slowest shutter speed 60 secs 30 secs
Maximum shutter speed 1/4000 secs 1/8000 secs
Maximum silent shutter speed 1/16000 secs -
Continuous shooting speed 8.7 frames/s 5.0 frames/s
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Set WB
Image stabilization
Inbuilt flash
Flash range 7.20 m (at ISO 200) no built-in flash
Flash settings Redeye, fill-in, off, redeye slow-sync (1st-curtain), slow sync (1st-curtain), slow sync (2nd-curtain), manual no built-in flash
Hot shoe
Auto exposure bracketing
White balance bracketing
Maximum flash sync 1/250 secs -
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
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, 25p, 24p), 1920 x 1080 (60p, 60i, 24p), 1440 x 1080 (30p), 640 x 480 (30p)
Maximum video resolution 3840x2160 3840x2160
Video file format MPEG-4, H.264 MPEG-4, AVCHD, XAVC S
Mic jack
Headphone jack
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 383g (0.84 pounds) 625g (1.38 pounds)
Dimensions 122 x 84 x 49mm (4.8" x 3.3" x 1.9") 127 x 96 x 60mm (5.0" x 3.8" x 2.4")
DXO scores
DXO All around score not tested 98
DXO Color Depth score not tested 26.0
DXO Dynamic range score not tested 13.9
DXO Low light score not tested 3434
Other
Battery life 360 pictures 290 pictures
Battery form Battery Pack Battery Pack
Battery model BLS-50 NP-FW50
Self timer Yes (2 or 12 sec, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting With downloadable app
Type of storage SD/SDHC/SDXC (UHS-II supported) SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Storage slots One One
Pricing at launch $699 $2,913