Pentax K-3 vs Olympus E-M5 II

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Pentax K-3 vs Olympus E-M5 II

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APS-C 366.6mm²
24.4 megapixels
ISO 100 - 51,200

Go in depth with our full Pentax K-3 Review.
How does it shoot? Pentax K-3 in the real world.
See real-world photos taken with the K-3.
Compare Pentax K-3 image quality against competitors.
What’s the bottom line? Read our Pentax K-3 conclusion.

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-3 II
Compare K-3 vs K-3 II

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

Compare PENTAX K-3 II vs OLYMPUS E-M5 III

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Differences

Pentax K-3 advantages over Olympus E-M5 II

Larger sensor
APS-C vs 4/3
More sensor area. Bigger is (generally) better.
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.
K-3 test data on DxO Mark E-M5 II test data on DxO Mark

1,216 vs 908 iso
Take photos in low light with less noise
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

560 vs 310 shots
Capture more photos
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
Top deck display
Yes vs No
Check settings with a screen on top of the camera
More pixels
24.4 vs 16.1 megapixels
Higher resolution photos
Dual card slots
Yes vs No
Gives you more storage flexibility
Headphone jack
Yes vs No
Monitor audio recording while you shoot video
Optional anti-aliasing filter
Optional vs None
Lets you choose sharper photos or reduced moiré
Bigger JPEG buffer
75 vs 18 shots
Take more JPEG shots before waiting (burst mode)
Bigger RAW buffer
24 vs 13 shots
Larger buffer for RAW shots (burst mode)
Higher extended ISO
51200 vs 25600 ISO
Higher extended ISO can give more low-light flexibility

Olympus E-M5 II advantages over Pentax K-3

Tilt-swivel screen
Tilt-swivel vs none
Tilt and swivel the screen for maximum shooting flexibility
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
Thinner
44 mm vs 77 mm
Thinner
More viewfinder magnification
0.74x vs 0.63x
Get a bigger view of the scene through the eye-level viewfinder
Longer exposure
60 vs 30 sec
Long exposures for night shots
Faster JPEG shooting
10.4 fps vs 7.1 fps
Faster JPEG shooting (burst mode)
Faster RAW shooting
10.4 fps vs 7.1 fps
Faster RAW shooting in burst mode
Faster shutter
1/16000 vs 1/8000 sec
Shoot wide open in bright light

Similarities

Common Strengths

Focus peaking
Both provide
Your camera will highlight what's in focus
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
External Mic Jack
Both provide
Improved sound fidelity when shooting video
HDMI out
Both provide
Use HDMI output to monitor or review video
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
Slow-motion videos
Neither provide
Shoot slow-motion videos

User reviews

Amazon
Adorama
Read K-3 User Reviews

Amazon
Adorama
Read E-M5 II User Reviews

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Review Excerpt

Top-notch image quality; Great ergonomics in a compact body; Unique on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots; Optional Wi-Fi remote control
AE Lock button is poorly located; Below-average battery life for a DSLR; Rather dated-looking menu system; Requires a different battery grip accessory than its predecessors; Less third-party support than some rivals
Read our Pentax K-3 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 Nikon D7100

Pentax K-3

Nikon D7100

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$745
APS-C

Fast startup
Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Olympus E-M5 II

Nikon D7100

$899
4/3

Focus peaking
Tilt-swivel screen

$745
APS-C

Larger sensor
Fast startup

Compare Olympus E-M5 II vs Nikon D7100

Compared to Panasonic GX7

Pentax K-3

Panasonic GX7

$699
APS-C

Larger sensor
Higher effective ISO

$648
4/3

Touchscreen
In-camera panoramas

Compare Pentax K-3 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 Nikon D5300

Pentax K-3

Nikon D5300

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$549
APS-C

Tilt-swivel screen
Fast startup

Compare Pentax K-3 vs Nikon D5300

Olympus E-M5 II

Nikon D5300

$899
4/3

Focus peaking
In-Camera Image Stabilization

$549
APS-C

Less expensive
Larger sensor

Compare Olympus E-M5 II vs Nikon D5300

Compared to Nikon D7200

Pentax K-3

Nikon D7200

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$1016
APS-C

Fast startup
Built-in Wi-Fi

Compare Pentax K-3 vs Nikon D7200

Olympus E-M5 II

Nikon D7200

$899
4/3

Less expensive
Tilt-swivel screen

$1016
APS-C

Larger sensor
Fast startup

Compare Olympus E-M5 II vs Nikon D7200

Compared to Panasonic GX85

Pentax K-3

Panasonic GX85

$699
APS-C

Larger sensor
Higher effective ISO

$598
4/3

Shoot 4K video
Touchscreen

Compare Pentax K-3 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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