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Olympus E-M10 II vs Pentax K-S1

Portability
82
Imaging
54
Features
77
Overall
63
Olympus OM-D E-M10 II front
 
Pentax K-S1 front
Portability
69
Imaging
63
Features
70
Overall
65

Olympus E-M10 II vs Pentax K-S1 Key Specs

Olympus E-M10 II
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 390g - 120 x 83 x 47mm
  • Introduced August 2015
  • Older Model is Olympus E-M10
  • Refreshed by Olympus E-M10 III
Pentax K-S1
(Full Review)
  • 20MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/6000s Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 558g - 121 x 93 x 70mm
  • Introduced August 2014
  • Newer Model is Pentax K-S2
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Olympus E-M10 II vs Pentax K-S1 Overview

Let's examine more in depth at the Olympus E-M10 II vs Pentax K-S1, former being a Entry-Level Mirrorless while the latter is a Advanced DSLR by competitors Olympus and Pentax. The sensor resolution of the E-M10 II (16MP) and the K-S1 (20MP) is pretty close but the E-M10 II (Four Thirds) and K-S1 (APS-C) enjoy totally different sensor sizing.

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The E-M10 II was introduced 13 months later than the K-S1 which makes the cameras a generation apart from each other. Each of these cameras offer different body type with the Olympus E-M10 II being a SLR-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.

Before delving straight into a thorough comparison, below is a simple highlight of how the E-M10 II matches up vs the K-S1 with regards to portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-M10 II over the Pentax K-S1

 E-M10 II K-S1 
IntroducedAugust 2015August 2014More recent by 13 months
Screen typeTiltingFixed Tilting screen
Screen resolution1040k921kClearer screen (+119k dot)
Touch screen Quickly navigate

Reasons to pick Pentax K-S1 over the Olympus E-M10 II

 K-S1 E-M10 II 

Common features in the Olympus E-M10 II and Pentax K-S1

 E-M10 II K-S1 
Focus manually More exact focus
Screen sizing3"3"Equivalent screen measurement
Selfie screen Absent selfie screen

Olympus E-M10 II vs Pentax K-S1 Physical Comparison

For those who are planning to lug around your camera frequently, you'll need to factor in its weight and volume. The Olympus E-M10 II provides external dimensions of 120mm x 83mm x 47mm (4.7" x 3.3" x 1.9") with a weight of 390 grams (0.86 lbs) and the Pentax K-S1 has sizing of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") with a weight of 558 grams (1.23 lbs).

Compare the Olympus E-M10 II vs Pentax K-S1 in our newest Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an ILC will change dependant on the lens you select at that time. Below is the front view measurements comparison of the E-M10 II vs the K-S1.

Olympus E-M10 II vs Pentax K-S1 size comparison

Taking into account size and weight, the portability grade of the E-M10 II and K-S1 is 82 and 69 respectively.

Olympus E-M10 II vs Pentax K-S1 top view buttons comparison

Olympus E-M10 II vs Pentax K-S1 Sensor Comparison

Oftentimes, it can be hard to see the gap in sensor measurements only by looking through technical specs. The visual below might offer you a better sense of the sensor sizes in the E-M10 II and K-S1.

As you can tell, the two cameras enjoy different resolutions and different sensor measurements. The E-M10 II using its smaller sensor will make getting shallow depth of field more difficult and the Pentax K-S1 will result in more detail using its extra 4 Megapixels. Higher resolution can also allow you to crop pictures far more aggressively. The more modern E-M10 II will have a benefit in sensor technology.

Olympus E-M10 II vs Pentax K-S1 sensor size comparison

Olympus E-M10 II vs Pentax K-S1 Screen and ViewFinder

Olympus E-M10 II vs Pentax K-S1 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 II Portrait photography factors
Pentax K-S1 Portrait photography factors
72
has manual focus
good MP (16MP)
sensor size is nice (Four Thirds)
provides face detect autofocus
supports RAW files
77
focusing manually
good megapixels (20 megapixels)
good sensor size (APS-C)
has face detect autofocus
saves RAW formats
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Street Comparison

Olympus E-M10 II Street photography info
Pentax K-S1 Street photography info
83
tilting screen
has image stabilization (Sensor based 5-axis)
sensor size is nice (Four Thirds)
supports RAW files
boasts focus by touch
very good ISO range (25,600)
73
has image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW formats
lighter than others (558 grams)
great high ISO (51,200)
screen does not articulate
Photography Glossary

Sports Comparison

Sports photography with Olympus E-M10 II
Sports photography with Pentax K-S1
67
has image stabilization (Sensor based 5-axis)
good MP (16MP)
sensor size is nice (Four Thirds)
provides tracking focus
lacks phase detect autofocus
69
maximum shutter speed is high (1/6,000s)
has image stabilization (Sensor based)
good megapixels (20MP)
good sensor size (APS-C)
has tracking focus
has phase detect autofocus
painfully slow continuous shooting (5.4 frames per second)
bad battery (410 shots)
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Travel Comparison

Olympus E-M10 II as a Travel photography camera
Pentax K-S1 as a Travel photography camera
73
boasts focus by touch
good MP (16 megapixels)
flash built-in
display isn't selfie friendly
60
lighter than others (558g)
good megapixels (20MP)
has built in flash
lack of Timelapse function
bad battery (410 shots)
doesn't have a selfie friendly display
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Landscape Comparison

Landscape photography with Olympus E-M10 II
Landscape photography with Pentax K-S1
79
has manual focus
switch lenses (Micro Four Thirds mount)
screen size is good (3 inches)
has image stabilization (Sensor based 5-axis)
good MP (16MP)
sensor size is nice (Four Thirds)
very good ISO range (25,600)
supports RAW files
73
focusing manually
switch lenses (Pentax KAF2 mount)
screen size is good (3 inch)
has image stabilization (Sensor based)
good megapixels (20 megapixels)
good sensor size (APS-C)
doesnt have anti-alias filter
great high ISO (51,200)
saves RAW formats
bad battery (410 per charge)
lack of Timelapse function
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Vlogging Comparison

Olympus E-M10 II as a Vlogging camera
Pentax K-S1 as a Vlogging camera
35
built-in touchscreen
has image stabilization (Sensor based 5-axis)
provides face detect autofocus
video res high (1920 x 1080 resolution)
display isn't selfie friendly
lack of mic port
33
has image stabilization (Sensor based)
has face detect autofocus
video resolution high (1920 x 1080 pxls)
lighter than others (558g)
doesn't have a selfie friendly display
lack of microphone support
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Olympus E-M10 II vs Pentax K-S1 Specifications

Detailed spec comparison table for Olympus E-M10 II and Pentax K-S1
 Olympus OM-D E-M10 IIPentax K-S1
General Information
Brand Name Olympus Pentax
Model type Olympus OM-D E-M10 II Pentax K-S1
Category Entry-Level Mirrorless Advanced DSLR
Introduced 2015-08-25 2014-08-27
Physical type SLR-style mirrorless Mid-size SLR
Sensor Information
Processor Chip TruePic VII Prime MII
Sensor type CMOS CMOS
Sensor size Four Thirds APS-C
Sensor measurements 17.3 x 13mm 23.5 x 15.6mm
Sensor area 224.9mm² 366.6mm²
Sensor resolution 16MP 20MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Full resolution 4608 x 3456 5472 x 3648
Max native ISO 25600 51200
Lowest native ISO 200 100
RAW support
Lowest boosted ISO 100 -
Autofocusing
Focus manually
Autofocus touch
Autofocus continuous
Single autofocus
Autofocus tracking
Selective autofocus
Autofocus center weighted
Multi area autofocus
Autofocus live view
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points 81 11
Lens
Lens support Micro Four Thirds Pentax KAF2
Total lenses 107 151
Focal length multiplier 2.1 1.5
Screen
Display type Tilting Fixed Type
Display size 3 inch 3 inch
Resolution of display 1,040 thousand dots 921 thousand dots
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder Electronic Optical (pentaprism)
Viewfinder resolution 2,360 thousand dots -
Viewfinder coverage 100% 100%
Viewfinder magnification 0.62x 0.64x
Features
Slowest shutter speed 60 seconds 30 seconds
Maximum shutter speed 1/4000 seconds 1/6000 seconds
Continuous shooting rate 8.0fps 5.4fps
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash distance 5.80 m (ISO 100) 10.00 m (at ISO 100)
Flash settings Auto, redeye reduction, fill flash, flash off, 1st-curtain slow sync w/redeye, 1st-curtain slow sync, 2nd-curtain slow sync, manual Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual
Hot shoe
Auto exposure bracketing
White balance bracketing
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Video resolutions 1920 x 1080 (60p/30p/24p), 1280 x 720 (60p/30p/24p), 640 x 480 (30 fps) 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps)
Max video resolution 1920x1080 1920x1080
Video format H.264, Motion JPEG H.264
Microphone support
Headphone support
Connectivity
Wireless Built-In Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None Optional
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 390 grams (0.86 lbs) 558 grams (1.23 lbs)
Dimensions 120 x 83 x 47mm (4.7" x 3.3" x 1.9") 121 x 93 x 70mm (4.8" x 3.7" x 2.8")
DXO scores
DXO All around rating 73 78
DXO Color Depth rating 23.1 23.5
DXO Dynamic range rating 12.5 13.0
DXO Low light rating 842 1061
Other
Battery life 320 photos 410 photos
Battery style Battery Pack Battery Pack
Battery ID BLS-50 D-LI109
Self timer Yes (12 sec., 2 sec, custom) Yes ( 2 or 12 seconds)
Time lapse recording
Type of storage SD/SDHC/SDXC SD/SDHC/SDXC
Card slots One One
Retail price $499 $339