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Olympus E-M10 III vs Pentax K-S2

Portability
80
Imaging
55
Features
75
Overall
63
Olympus OM-D E-M10 Mark III front
 
Pentax K-S2 front
Portability
64
Imaging
64
Features
82
Overall
71

Olympus E-M10 III vs Pentax K-S2 Key Specs

Olympus E-M10 III
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Micro Four Thirds Mount
  • 410g - 122 x 84 x 50mm
  • Announced August 2017
  • Previous Model is Olympus E-M10 II
  • Replacement is Olympus E-M10 IV
Pentax K-S2
(Full Review)
  • 20MP - APS-C Sensor
  • 3" Fully Articulated Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/6000s Max Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 678g - 123 x 91 x 73mm
  • Announced February 2015
  • Replaced the Pentax K-S1
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Olympus E-M10 III vs Pentax K-S2 Overview

Here, we will be contrasting the Olympus E-M10 III vs Pentax K-S2, one being a Entry-Level Mirrorless and the latter is a Entry-Level DSLR by manufacturers Olympus and Pentax. The image resolution of the E-M10 III (16MP) and the K-S2 (20MP) is pretty comparable but the E-M10 III (Four Thirds) and K-S2 (APS-C) posses different sensor size.

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The E-M10 III was announced 2 years later than the K-S2 and that is a fairly big gap as far as camera technology is concerned. Both of these cameras feature different body design with the Olympus E-M10 III being a SLR-style mirrorless camera and the Pentax K-S2 being a Compact SLR camera.

Before diving into a thorough comparison, here is a simple summary of how the E-M10 III grades against the K-S2 in terms of portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-M10 III over the Pentax K-S2

 E-M10 III K-S2 
AnnouncedAugust 2017February 2015More recent by 32 months
Screen resolution1040k921kClearer screen (+119k dot)
Touch screen Quickly navigate

Reasons to pick Pentax K-S2 over the Olympus E-M10 III

 K-S2 E-M10 III 
Screen typeFully ArticulatedTiltingFully Articulating screen
Selfie screen Take selfies

Common features in the Olympus E-M10 III and Pentax K-S2

 E-M10 III K-S2 
Manually focus More exact focus
Screen size3"3"Same screen size

Olympus E-M10 III vs Pentax K-S2 Physical Comparison

For anyone who is planning to lug around your camera often, you should factor its weight and proportions. The Olympus E-M10 III comes with external measurements of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") along with a weight of 410 grams (0.90 lbs) and the Pentax K-S2 has measurements of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") accompanied by a weight of 678 grams (1.49 lbs).

Look at the Olympus E-M10 III vs Pentax K-S2 in the all new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will change based on the lens you are using at that time. Following is a front view dimensions comparison of the E-M10 III versus the K-S2.

Olympus E-M10 III vs Pentax K-S2 size comparison

Looking at dimensions and weight, the portability score of the E-M10 III and K-S2 is 80 and 64 respectively.

Olympus E-M10 III vs Pentax K-S2 top view buttons comparison

Olympus E-M10 III vs Pentax K-S2 Sensor Comparison

Normally, it's hard to visualize the gap in sensor measurements merely by checking out specifications. The photograph underneath may provide you a stronger sense of the sensor sizing in the E-M10 III and K-S2.

To sum up, the 2 cameras feature different megapixels and different sensor measurements. The E-M10 III using its smaller sensor is going to make shooting bokeh harder and the Pentax K-S2 will provide greater detail with its extra 4MP. Higher resolution can also make it easier to crop pictures way more aggressively. The more recent E-M10 III provides a benefit when it comes to sensor innovation.

Olympus E-M10 III vs Pentax K-S2 sensor size comparison

Olympus E-M10 III vs Pentax K-S2 Screen and ViewFinder

Olympus E-M10 III vs Pentax K-S2 Screen and Viewfinder comparison
Photography Glossary

Photography Type Scores

Portrait Comparison

Olympus E-M10 III as a Portrait photography camera
Pentax K-S2 as a Portrait photography camera
73
you can focus manually
good resolution (16MP)
nice sensor size (Four Thirds)
comes with face detection focusing
saves RAW files
78
manual focus
resolution is good (20MP)
sensor size is decent (APS-C)
has face detection focus
exports RAW files
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Street Comparison

Street photography with Olympus E-M10 III
Street photography with Pentax K-S2
77
screen tilts up and down
image stabilization (Sensor based 5-axis)
nice sensor size (Four Thirds)
saves RAW files
comes with touch to focus
very good high ISO (25,600)
heavier than competition (410g)
72
fully articulated screen
image stabilization (Sensor based)
sensor size is decent (APS-C)
exports RAW files
weather proofing
good ISO range (51,200)
more heavy than competitors in class (678g)
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Sports Comparison

Sports photography with Olympus E-M10 III
Sports photography with Pentax K-S2
69
quiet mode (1/16,000 seconds)
image stabilization (Sensor based 5-axis)
good resolution (16 megapixels)
nice sensor size (Four Thirds)
comes with tracking autofocus
no phase detect AF
70
high shutter speed (1/6,000 seconds)
image stabilization (Sensor based)
resolution is good (20 megapixels)
sensor size is decent (APS-C)
has tracking autofocus
weather proofing
has phase detect auto focus
max fps very slow (5.4 frames per second)
low battery power (410 per charge)
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Travel Comparison

Olympus E-M10 III Travel photography advice
Pentax K-S2 Travel photography advice
67
comes with touch to focus
good resolution (16 megapixels)
built-in flash
heavier than competition (410 grams)
display isn't selfie friendly
65
weather proofing
resolution is good (20 megapixels)
built-in flash
screen is selfie friendly
low battery power (410 shots)
more heavy than competitors in class (678 grams)
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Landscape Comparison

Olympus E-M10 III Landscape photography advice
Pentax K-S2 Landscape photography advice
80
you can focus manually
switch lenses (Micro Four Thirds mount)
screen size is good (3 inches)
image stabilization (Sensor based 5-axis)
good resolution (16MP)
nice sensor size (Four Thirds)
very good high ISO (25,600)
saves RAW files
77
manual focus
switch lenses (Pentax KAF2 mount)
screen size is good (3 inch)
image stabilization (Sensor based)
resolution is good (20MP)
sensor size is decent (APS-C)
does not have anti-alias filter
good ISO range (51,200)
exports RAW files
weather proofing
low battery power (410 per charge)
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Vlogging Comparison

Olympus E-M10 III Vlogging advice
Pentax K-S2 Vlogging advice
32
touchscreen capability
image stabilization (Sensor based 5-axis)
comes with face detection focusing
high res video (3840 x 2160 pixels)
display isn't selfie friendly
no external mic port
heavier than competition (410 grams)
71
screen is selfie friendly
image stabilization (Sensor based)
has face detection focus
great video quality (1920 x 1080 pxls)
has external microphone jack
more heavy than competitors in class (678g)
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Olympus E-M10 III vs Pentax K-S2 Specifications

Detailed spec comparison table for Olympus E-M10 III and Pentax K-S2
 Olympus OM-D E-M10 Mark IIIPentax K-S2
General Information
Brand Olympus Pentax
Model Olympus OM-D E-M10 Mark III Pentax K-S2
Class Entry-Level Mirrorless Entry-Level DSLR
Announced 2017-08-31 2015-02-10
Body design SLR-style mirrorless Compact SLR
Sensor Information
Powered by TruePic VIII PRIME MII
Sensor type CMOS CMOS
Sensor size Four Thirds APS-C
Sensor measurements 17.4 x 13mm 23.5 x 15.6mm
Sensor area 226.2mm² 366.6mm²
Sensor resolution 16 megapixel 20 megapixel
Anti aliasing filter
Aspect ratio 4:3 3:2
Full resolution 4608 x 3456 5472 x 3648
Max native ISO 25600 51200
Min native ISO 200 100
RAW pictures
Min boosted ISO 100 -
Autofocusing
Manual focus
Touch to focus
AF continuous
AF single
Tracking AF
Selective AF
Center weighted AF
Multi area AF
AF live view
Face detect AF
Contract detect AF
Phase detect AF
Number of focus points 121 11
Lens
Lens mount Micro Four Thirds Pentax KAF2
Number of lenses 107 151
Crop factor 2.1 1.5
Screen
Display type Tilting Fully Articulated
Display sizing 3 inch 3 inch
Display resolution 1,040k dot 921k dot
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder type Electronic Optical (pentaprism)
Viewfinder resolution 2,360k dot -
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.62x 0.64x
Features
Lowest shutter speed 60 seconds 30 seconds
Highest shutter speed 1/4000 seconds 1/6000 seconds
Highest quiet shutter speed 1/16000 seconds -
Continuous shooting speed 8.6 frames per second 5.4 frames per second
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom WB
Image stabilization
Integrated flash
Flash range 5.80 m (at ISO 100) 12.00 m (at ISO 100)
Flash settings Auto, redeye, slow sync, 2nd-curtain slow sync, redeye slow sync, fill-in, manual, off Auto, auto w/redeye reduction, flash on, flash on + redeye reduction, slow sync, trailing curtain sync, manual flash
External flash
AE bracketing
WB bracketing
Highest flash sync 1/250 seconds -
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 1920 x 1080 (30p, 25p, 24p), 1280 x 720 (60p, 50p)
Max video resolution 3840x2160 1920x1080
Video data format MPEG-4, H.264 MPEG-4, H.264
Microphone input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None Optional
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 410 gr (0.90 lbs) 678 gr (1.49 lbs)
Physical dimensions 122 x 84 x 50mm (4.8" x 3.3" x 2.0") 123 x 91 x 73mm (4.8" x 3.6" x 2.9")
DXO scores
DXO All around score not tested not tested
DXO Color Depth score not tested not tested
DXO Dynamic range score not tested not tested
DXO Low light score not tested not tested
Other
Battery life 330 photographs 410 photographs
Form of battery Battery Pack Battery Pack
Battery model BLS-50 D-LI109
Self timer Yes (2 or 12 secs, custom) Yes (2 or 12 secs)
Time lapse shooting
Storage media SD/SDHC/SDXC (UHS-I/II supported) SD/SDHC/SDXC
Storage slots One One
Price at launch $650 $581