Pentax K-x vs Olympus E-M5 II

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Pentax K-x vs Olympus E-M5 II

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APS-C 369.7mm²
12.4 megapixels
ISO 200 - 6400

Go in depth with our full Pentax K-x Review.
See real-world photos taken with the K-x.

4/3 224.9mm²
16.1 megapixels
ISO 200 - 25,600

Go in depth with our full Olympus E-M5 II Review.
How does it shoot? Olympus E-M5 II in the real world.
See real-world photos taken with the E-M5 II.
Compare Olympus E-M5 II image quality against competitors.
What’s the bottom line? Read our Olympus E-M5 II conclusion.

Succeeded by the Pentax K-r
Compare K-x vs K-r

Succeeded by the Olympus E-M5 III
Compare E-M5 II vs E-M5 III

Compare PENTAX K-R vs OLYMPUS E-M5 III

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Differences

Pentax K-x advantages over Olympus E-M5 II

Larger sensor
APS-C vs 4/3
More sensor area. Bigger is (generally) better.
Bigger pixels
~ 5.53 vs 3.75 microns
Better low-light and dynamic range (all else equal)
Fast startup
~0.60 vs 0.8 sec
Faster startup lets you catch the moment
Longer stills battery life
More info

Longer stills battery life

Cameras with longer battery life can take more photos before exhausting their batteries.

Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

420 vs 310 shots
Capture more photos
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
Has anti-aliasing filter
Filter vs No Filter
Reduces unsightly moiré in photos

Olympus E-M5 II advantages over Pentax K-x

Tilt-swivel screen
Tilt-swivel vs none
Tilt and swivel the screen for maximum shooting flexibility
Focus peaking
Peaker vs Non-peaker
Your camera will highlight what's in focus
Touchscreen
Touch vs No touch
Interact with your camera just like your smartphone
High resolution composite
Yes vs No
Combine multiple shots to form a super hi-res version
Built-in Wi-Fi
Wi-Fi vs None
Share your photos wirelessly
Higher effective ISO

Higher effective ISO

Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

You can learn more at our glossary entry.

Maximum effective ISO test data courtesy of DxO Mark.
E-M5 II test data on DxO Mark K-x test data on DxO Mark

908 vs 811 iso
Take photos in low light with less noise
Thinner
44 mm vs 69 mm
Thinner
External Mic Jack
Jack vs No jack
Improved sound fidelity when shooting video
Newer
10 years vs 15 years old
Newer cameras often support more advanced features
HDMI out
HDMI out vs None
Use HDMI output to monitor or review video
More dots on screen
1037k vs 230k dots
Can mean greater resolution or a brighter screen
Shoots 1080p video
Yes vs No
You'll want this if you shoot video
More viewfinder magnification
0.74x vs 0.57x
Get a bigger view of the scene through the eye-level viewfinder
More pixels
16.1 vs 12.4 megapixels
Higher resolution photos
Shoots 60p video
Yes vs No
A faster framerate can give you more editing options
Lacks anti-aliasing filter
No Filter vs Filter
Enjoy sharper photos
Longer exposure
60 vs 30 sec
Long exposures for night shots
Faster JPEG shooting
10.4 fps vs 4.3 fps
Faster JPEG shooting (burst mode)
Faster shutter
1/16000 vs 1/6000 sec
Shoot wide open in bright light
Higher extended ISO
25600 vs 12800 ISO
Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

Eye-level viewfinder
Both provide
You'll be able to frame photos even when the sun is out
In-Camera Image Stabilization
Both provide
Reduces the effects of camera shake at slower shutter speeds
Hot shoe
Both provide
Off-camera flashes open new possibilities
Bulb shutter
Both provide
Hold the shutter open manually for long exposures

Common Weaknesses

In-camera panoramas
Neither provide
Stitches multiple shots into a panoramic photo
NFC
Neither provide
Simplifies pairing your camera with supported phones
Built-in Bluetooth
Neither provide
Always-on wireless connectivity
Built-in GPS
Neither provide
Geotag your photos
On-sensor phase detect
Neither provide
Usually improves live view and video AF performance
Top deck display
Neither provide
Check settings with a screen on top of the camera
Dual card slots
Neither provide
Gives you more storage flexibility
Headphone jack
Neither provide
Monitor audio recording while you shoot video
Slow-motion videos
Neither provide
Shoot slow-motion videos

User reviews

Amazon
Adorama
Read K-x User Reviews

Amazon
Adorama
Read E-M5 II User Reviews

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Review Excerpt

Read our Pentax K-x Full Review

Excellent handling in a compact, weather-sealed body; Crisp, roomy electronic viewfinder; Image quality that can take the fight to APS-C DSLRs; Unique high-res mode lets it bat far above its weight for static scenes; Extremely fast 10 fps burst shooting, Excellent video feature set
Control dials are easily bumped; Below-average battery life at default settings; Buffer depths for raw shooters are a bit limited; 16-megapixel sensor resolution feels dated; Weak bundled flash strobe
Read our Olympus E-M5 II Review

The Competition

Compared to Sony DSLR-A380

Pentax K-x

Sony DSLR-A380

$702
APS-C

Lens selection
Less expensive

$849
APS-C

Tiltable Screen
HDMI out

Compare Pentax K-x vs Sony DSLR-A380

Olympus E-M5 II

Sony DSLR-A380

$899
4/3

Tilt-swivel screen
Lens selection

$849
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Sony DSLR-A380

Compared to Pentax K-7

Pentax K-x

Pentax K-7

$702
APS-C

Less expensive
Higher effective ISO

$1300
APS-C

Longer stills battery life
Top deck display

Compare Pentax K-x vs Pentax K-7

Olympus E-M5 II

Pentax K-7

$899
4/3

Tilt-swivel screen
Focus peaking

$1300
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Pentax K-7

Compared to Pentax K-r

Pentax K-x

Pentax K-r

$702
APS-C

Less expensive
Shoots 24p video

$850
APS-C

Fast startup
External Mic Jack

Compare Pentax K-x vs Pentax K-r

Olympus E-M5 II

Pentax K-r

$899
4/3

Tilt-swivel screen
Focus peaking

$850
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Pentax K-r

Compared to Panasonic GX7

Pentax K-x

Panasonic GX7

$702
APS-C

Less expensive
Larger sensor

$648
4/3

Focus peaking
Touchscreen

Compare Pentax K-x vs Panasonic GX7

Olympus E-M5 II

Panasonic GX7

$899
4/3

Tilt-swivel screen
High resolution composite

$648
4/3

In-camera panoramas
Internal flash

Compare Olympus E-M5 II vs Panasonic GX7

Compared to Panasonic GX85

Pentax K-x

Panasonic GX85

$702
APS-C

Larger sensor
Bigger pixels

$598
4/3

Focus peaking
Shoot 4K video

Compare Pentax K-x vs Panasonic GX85

Olympus E-M5 II

Panasonic GX85

$899
4/3

Tilt-swivel screen
High resolution composite

$598
4/3

Less expensive
Shoot 4K video

Compare Olympus E-M5 II vs Panasonic GX85

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