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Olympus E-M10 IV vs Pentax K-x

Portability
81
Imaging
62
Features
83
Overall
70
Olympus OM-D E-M10 IV front
 
Pentax K-x front
Portability
69
Imaging
52
Features
47
Overall
50

Olympus E-M10 IV vs Pentax K-x Key Specs

Olympus E-M10 IV
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 3840 x 2160 video
  • Micro Four Thirds Mount
  • 383g - 122 x 84 x 49mm
  • Revealed August 2020
  • Older Model is Olympus E-M10 III
Pentax K-x
(Full Review)
  • 12MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 6400 (Raise to 12800)
  • Sensor based Image Stabilization
  • 1/6000s Max Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 580g - 123 x 92 x 68mm
  • Released December 2009
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Olympus E-M10 IV vs Pentax K-x Overview

Its time to look a bit more in depth at the Olympus E-M10 IV and Pentax K-x, one is a Entry-Level Mirrorless and the latter is a Entry-Level DSLR by manufacturers Olympus and Pentax. There is a huge difference among the sensor resolutions of the E-M10 IV (20MP) and K-x (12MP) and the E-M10 IV (Four Thirds) and K-x (APS-C) use different sensor sizing.

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The E-M10 IV was announced 10 years after the K-x which is a fairly significant gap as far as camera tech is concerned. The two cameras offer different body type with the Olympus E-M10 IV being a SLR-style mirrorless camera and the Pentax K-x being a Compact SLR camera.

Before diving straight into a in depth comparison, below is a short view of how the E-M10 IV grades vs the K-x with respect to portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M10 IV over the Pentax K-x

 E-M10 IV K-x 
ReleasedAugust 2020December 2009Newer by 130 months
Screen typeTiltingFixed Tilting screen
Screen sizing3"2.7"Bigger screen (+0.3")
Screen resolution1040k230kSharper screen (+810k dot)
Selfie screen Easy selfies
Touch friendly screen Quickly navigate

Reasons to pick Pentax K-x over the Olympus E-M10 IV

 K-x E-M10 IV 

Common features in the Olympus E-M10 IV and Pentax K-x

 E-M10 IV K-x 
Manually focus Dial precise focus

Olympus E-M10 IV vs Pentax K-x Physical Comparison

If you are looking to travel with your camera, you have to factor in its weight and measurements. The Olympus E-M10 IV has got exterior dimensions of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") accompanied by a weight of 383 grams (0.84 lbs) whilst the Pentax K-x has proportions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") and a weight of 580 grams (1.28 lbs).

Check out the Olympus E-M10 IV and Pentax K-x in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an Interchangeable Lens Camera will change depending on the lens you have at that time. The following is the front view measurement comparison of the E-M10 IV versus the K-x.

Olympus E-M10 IV vs Pentax K-x size comparison

Looking at size and weight, the portability rating of the E-M10 IV and K-x is 81 and 69 respectively.

Olympus E-M10 IV vs Pentax K-x top view buttons comparison

Olympus E-M10 IV vs Pentax K-x Sensor Comparison

Usually, it is hard to picture the contrast in sensor dimensions only by checking out a spec sheet. The pic below may offer you a more clear sense of the sensor sizes in the E-M10 IV and K-x.

Clearly, the two cameras enjoy different megapixel count and different sensor dimensions. The E-M10 IV using its smaller sensor is going to make getting shallower DOF harder and the Olympus E-M10 IV will produce greater detail with its extra 8MP. Higher resolution will also help you crop shots far more aggressively. The more recent E-M10 IV should have a benefit with regard to sensor tech.

Olympus E-M10 IV vs Pentax K-x sensor size comparison

Olympus E-M10 IV vs Pentax K-x Screen and ViewFinder

Olympus E-M10 IV vs Pentax K-x Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 IV Portrait photography advice
Pentax K-x Portrait photography advice
77
you can focus manually
MP count good (20MP)
sensor size is decent (Four Thirds)
includes face detect focusing
supports RAW formats
63
you can focus manually
good sensor size (APS-C)
comes with face detection autofocus
delivers RAW formats
resolution not great (12 megapixels)
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Street Comparison

Olympus E-M10 IV Street photography factors
Pentax K-x Street photography factors
84
has a tilting screen
image stabilization (Sensor based 5-axis)
sensor size is decent (Four Thirds)
supports RAW formats
comes with touch focus
good ISO range (25,600)
67
built in image stabilization (Sensor based)
good sensor size (APS-C)
delivers RAW formats
screen does not articulate
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Sports Comparison

Olympus E-M10 IV Sports photography info
Pentax K-x Sports photography info
72
quiet shutter (1/16,000 seconds)
image stabilization (Sensor based 5-axis)
MP count good (20 megapixels)
sensor size is decent (Four Thirds)
includes tracking focus
does not have phase detect AF
61
high shutter speed (1/6,000s)
built in image stabilization (Sensor based)
good sensor size (APS-C)
great battery life (1,900 shots)
has phase detect autofocus
max fps low (5.0 frames per second)
resolution not great (12 megapixels)
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Travel Comparison

Olympus E-M10 IV Travel photography features
Pentax K-x Travel photography features
84
has bluetooth
comes with touch focus
MP count good (20 megapixels)
has built in flash
selfie friendly screen
54
great battery life (1,900 per charge)
built-in flash
doesn't have Timelapse recording
resolution not great (12 megapixels)
display is not selfie friendly
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Landscape Comparison

Olympus E-M10 IV Landscape photography information
Pentax K-x Landscape photography information
82
you can focus manually
interchangeable lenses (Micro Four Thirds mount)
pretty good screen size (3 inch)
image stabilization (Sensor based 5-axis)
MP count good (20MP)
sensor size is decent (Four Thirds)
good ISO range (25,600)
supports RAW formats
61
you can focus manually
switch lenses (Pentax KAF2 mount)
built in image stabilization (Sensor based)
good sensor size (APS-C)
delivers RAW formats
great battery life (1,900 CIPA)
small screen (2.7 inches)
resolution not great (12 megapixels)
doesn't have Timelapse recording
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Vlogging Comparison

Vlogging with Olympus E-M10 IV
Vlogging with Pentax K-x
78
selfie friendly screen
screen is touchscreen
image stabilization (Sensor based 5-axis)
includes face detect focusing
high quality video (3840 x 2160 resolution)
doesn't have mic jack
27
built in image stabilization (Sensor based)
comes with face detection autofocus
display is not selfie friendly
low video resolution (1280 x 720 resolution)
doesn't have external microphone jack
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Olympus E-M10 IV vs Pentax K-x Specifications

Detailed spec comparison table for Olympus E-M10 IV and Pentax K-x
 Olympus OM-D E-M10 IVPentax K-x
General Information
Company Olympus Pentax
Model type Olympus OM-D E-M10 IV Pentax K-x
Category Entry-Level Mirrorless Entry-Level DSLR
Revealed 2020-08-04 2009-12-23
Body design SLR-style mirrorless Compact SLR
Sensor Information
Powered by TruePic VIII Prime
Sensor type CMOS CMOS
Sensor size Four Thirds APS-C
Sensor measurements 17.4 x 13mm 23.6 x 15.8mm
Sensor surface area 226.2mm² 372.9mm²
Sensor resolution 20MP 12MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Peak resolution 5184 x 3888 4288 x 2848
Highest native ISO 25600 6400
Highest enhanced ISO - 12800
Minimum native ISO 200 100
RAW images
Minimum enhanced ISO 100 -
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Single autofocus
Tracking autofocus
Selective autofocus
Autofocus center weighted
Autofocus multi area
Autofocus live view
Face detect focus
Contract detect focus
Phase detect focus
Total focus points 121 11
Lens
Lens support Micro Four Thirds Pentax KAF2
Number of lenses 107 151
Focal length multiplier 2.1 1.5
Screen
Range of display Tilting Fixed Type
Display diagonal 3 inches 2.7 inches
Display resolution 1,040k dot 230k dot
Selfie friendly
Liveview
Touch capability
Display tech - TFT LCD monitor
Viewfinder Information
Viewfinder Electronic Optical (pentamirror)
Viewfinder resolution 2,360k dot -
Viewfinder coverage 100 percent 96 percent
Viewfinder magnification 0.62x 0.57x
Features
Minimum shutter speed 60 secs 30 secs
Fastest shutter speed 1/4000 secs 1/6000 secs
Fastest quiet shutter speed 1/16000 secs -
Continuous shutter speed 8.7 frames per second 5.0 frames per second
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Built-in flash
Flash distance 7.20 m (at ISO 200) 16.00 m
Flash modes Redeye, fill-in, off, redeye slow-sync (1st-curtain), slow sync (1st-curtain), slow sync (2nd-curtain), manual Auto, On, Off, Red-Eye, Slow Sync, Rear curtain, Wireless
External flash
AE bracketing
WB bracketing
Fastest flash sync 1/250 secs 1/180 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 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 1280 x 720 (24 fps), 640 x 416 (24 fps)
Highest video resolution 3840x2160 1280x720
Video data format MPEG-4, H.264 Motion JPEG
Microphone input
Headphone input
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 383 grams (0.84 pounds) 580 grams (1.28 pounds)
Dimensions 122 x 84 x 49mm (4.8" x 3.3" x 1.9") 123 x 92 x 68mm (4.8" x 3.6" x 2.7")
DXO scores
DXO Overall rating not tested 72
DXO Color Depth rating not tested 22.8
DXO Dynamic range rating not tested 12.5
DXO Low light rating not tested 811
Other
Battery life 360 photographs 1900 photographs
Form of battery Battery Pack Battery Pack
Battery ID BLS-50 4 x AA
Self timer Yes (2 or 12 sec, custom) Yes (2 or 12 sec)
Time lapse shooting
Storage media SD/SDHC/SDXC (UHS-II supported) SD/SDHC card
Storage slots Single Single
Retail pricing $699 $600