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Olympus E-M1X vs Pentax K100D S

Portability
54
Imaging
62
Features
93
Overall
74
Olympus OM-D E-M1X front
 
Pentax K100D Super front
Portability
65
Imaging
45
Features
38
Overall
42

Olympus E-M1X vs Pentax K100D S Key Specs

Olympus E-M1X
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 997g - 144 x 147 x 75mm
  • Released January 2019
  • Old Model is Olympus E-M1 II
Pentax K100D S
(Full Review)
  • 6MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 200 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 646g - 129 x 91 x 71mm
  • Announced June 2007
  • Replaced the Pentax K100D
  • Newer Model is Pentax K200D
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Olympus E-M1X vs Pentax K100D S Overview

In this write-up, we are looking at the Olympus E-M1X and Pentax K100D S, former is a Pro Mirrorless while the other is a Entry-Level DSLR by manufacturers Olympus and Pentax. There is a substantial difference between the sensor resolutions of the E-M1X (20MP) and K100D S (6MP) and the E-M1X (Four Thirds) and K100D S (APS-C) use totally different sensor sizes.

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The E-M1X was brought out 11 years after the K100D S which is quite a big difference as far as tech is concerned. Both cameras offer different body type with the Olympus E-M1X being a SLR-style mirrorless camera and the Pentax K100D S being a Compact SLR camera.

Before we go through a full comparison, below is a brief view of how the E-M1X scores versus the K100D S when considering portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M1X over the Pentax K100D S

 E-M1X K100D S 
AnnouncedJanuary 2019June 2007Newer by 141 months
Display typeFully ArticulatedFixed Fully Articulating display
Display sizing3"2.5"Larger display (+0.5")
Display resolution1037k210kClearer display (+827k dot)
Selfie screen Easy selfies
Touch friendly display Easily navigate

Reasons to pick Pentax K100D S over the Olympus E-M1X

 K100D S E-M1X 

Common features in the Olympus E-M1X and Pentax K100D S

 E-M1X K100D S 
Focus manually More accurate focusing

Olympus E-M1X vs Pentax K100D S Physical Comparison

If you're looking to travel with your camera, you'll need to factor its weight and measurements. The Olympus E-M1X provides exterior measurements of 144mm x 147mm x 75mm (5.7" x 5.8" x 3.0") along with a weight of 997 grams (2.20 lbs) whilst the Pentax K100D S has proportions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") having a weight of 646 grams (1.42 lbs).

Examine the Olympus E-M1X and Pentax K100D S in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an ILC will change depending on the lens you choose at the time. Here is the front view measurement comparison of the E-M1X compared to the K100D S.

Olympus E-M1X vs Pentax K100D S size comparison

Factoring in size and weight, the portability score of the E-M1X and K100D S is 54 and 65 respectively.

Olympus E-M1X vs Pentax K100D S top view buttons comparison

Olympus E-M1X vs Pentax K100D S Sensor Comparison

Oftentimes, it's hard to see the gap between sensor dimensions simply by checking a spec sheet. The image here will offer you a stronger sense of the sensor measurements in the E-M1X and K100D S.

Clearly, each of these cameras offer different megapixel count and different sensor dimensions. The E-M1X featuring a tinier sensor will make shooting shallower depth of field harder and the Olympus E-M1X will resolve extra detail having its extra 14MP. Greater resolution will make it easier to crop pics a little more aggressively. The younger E-M1X is going to have an edge with regard to sensor tech.

Olympus E-M1X vs Pentax K100D S sensor size comparison

Olympus E-M1X vs Pentax K100D S Screen and ViewFinder

Olympus E-M1X vs Pentax K100D S Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M1X Portrait photography info
Pentax K100D S Portrait photography info
77
you can focus manually
good resolution (20MP)
sensor size is decent (Four Thirds)
offers face detect autofocus
supports RAW files
51
you can focus manually
good sensor size (APS-C)
saves RAW files
no liveview feature
megapixel count low (6MP)
Photography Glossary

Street Comparison

Street photography with Olympus E-M1X
Street photography with Pentax K100D S
67
fully articulated screen
image stabilization (Sensor based 5-axis)
sensor size is decent (Four Thirds)
supports RAW files
comes with focus by touch
environment proof
above average high ISO (25,600)
more heavy than average in class (997g)
64
has image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW files
fixed screen
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Sports Comparison

Sports photography with Olympus E-M1X
Sports photography with Pentax K100D S
81
maximum shutter speed is high (1/8,000s)
quiet mode (1/32,000s)
high fps (60.0 frames per second)
image stabilization (Sensor based 5-axis)
good resolution (20MP)
sensor size is decent (Four Thirds)
offers tracking focus
environment proof
great battery pack (870 CIPA)
comes with phase detect autofocus
47
has image stabilization (Sensor based)
good sensor size (APS-C)
supports phase detect AF
no liveview feature
very slow continuous shooting (3.0 frames per second)
megapixel count low (6 megapixels)
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Travel Comparison

Travel photography with Olympus E-M1X
Travel photography with Pentax K100D S
68
great battery pack (870 shots)
environment proof
supports bluetooth
comes with focus by touch
good resolution (20MP)
selfie friendly screen
more heavy than average in class (997 grams)
45
has built in flash
lack of Time Lapse recording
megapixel count low (6 megapixels)
display isn't selfie friendly
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Landscape Comparison

Landscape photography with Olympus E-M1X
Landscape photography with Pentax K100D S
80
you can focus manually
interchangeable lenses (Micro Four Thirds mount)
good sized screen (3 inches)
image stabilization (Sensor based 5-axis)
good resolution (20 megapixels)
sensor size is decent (Four Thirds)
above average high ISO (25,600)
supports RAW files
environment proof
great battery pack (870 CIPA)
two card slots
52
you can focus manually
switch lenses (Pentax KAF2 mount)
has image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW files
screen is small (2.5")
no liveview feature
megapixel count low (6 megapixels)
lack of Time Lapse recording
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Vlogging Comparison

Olympus E-M1X as a Vlogging camera
Pentax K100D S as a Vlogging camera
68
selfie friendly screen
touchscreen
image stabilization (Sensor based 5-axis)
offers face detect autofocus
video resolution high (4096 x 2160 resolution)
does have microphone socket
more heavy than average in class (997 grams)
9
can't shoot video
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Olympus E-M1X vs Pentax K100D S Specifications

Detailed spec comparison table for Olympus E-M1X and Pentax K100D S
 Olympus OM-D E-M1XPentax K100D Super
General Information
Manufacturer Olympus Pentax
Model Olympus OM-D E-M1X Pentax K100D Super
Category Pro Mirrorless Entry-Level DSLR
Released 2019-01-24 2007-06-28
Physical type SLR-style mirrorless Compact SLR
Sensor Information
Powered by Dual TruePic VIII -
Sensor type CMOS CCD
Sensor size Four Thirds APS-C
Sensor dimensions 17.4 x 13mm 23.5 x 15.7mm
Sensor area 226.2mm² 369.0mm²
Sensor resolution 20MP 6MP
Anti aliasing filter
Aspect ratio 4:3 3:2
Highest resolution 5184 x 3888 3008 x 2008
Highest native ISO 25600 3200
Lowest native ISO 200 200
RAW files
Lowest boosted ISO 64 -
Autofocusing
Manual focus
Autofocus touch
Continuous autofocus
Single autofocus
Autofocus tracking
Selective autofocus
Autofocus center weighted
Autofocus multi area
Autofocus live view
Face detect focus
Contract detect focus
Phase detect focus
Number of focus points 121 11
Lens
Lens mounting type Micro Four Thirds Pentax KAF2
Number of lenses 107 151
Focal length multiplier 2.1 1.5
Screen
Type of display Fully Articulated Fixed Type
Display diagonal 3 inches 2.5 inches
Resolution of display 1,037 thousand dots 210 thousand dots
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder Electronic Optical (pentamirror)
Viewfinder resolution 2,360 thousand dots -
Viewfinder coverage 100% 96%
Viewfinder magnification 0.74x 0.57x
Features
Slowest shutter speed 60 secs 30 secs
Maximum shutter speed 1/8000 secs 1/4000 secs
Maximum quiet shutter speed 1/32000 secs -
Continuous shooting rate 60.0 frames per sec 3.0 frames per sec
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash range no built-in flash -
Flash options Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync.(1st curtain), Slow sync (2nd curtain), manual Auto, On, Off, Red-eye reduction
Hot shoe
AEB
White balance bracketing
Maximum flash synchronize - 1/180 secs
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM -
Highest video resolution 4096x2160 None
Video data format MPEG-4, H.264 -
Mic support
Headphone support
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB Yes (USB-PD allows charging by laptop or external power bank) USB 2.0 (480 Mbit/sec)
GPS Built-in None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 997 gr (2.20 lbs) 646 gr (1.42 lbs)
Dimensions 144 x 147 x 75mm (5.7" x 5.8" x 3.0") 129 x 91 x 71mm (5.1" x 3.6" x 2.8")
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 870 photos -
Battery style Built-in -
Battery model - 4 x AA
Self timer Yes (2 or 12 secs, custom) Yes (2 or 12 sec)
Time lapse shooting
Storage type - SD/SDHC card
Card slots Two 1
Retail cost $2,999 $520