Pentax K-3 vs Olympus E-M1 II

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Pentax K-3 vs Olympus E-M1 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.

4/3 226.2mm²
20.4 megapixels
ISO 200 - 25,600

Go in depth with our full Olympus E-M1 II Review.
How does it shoot? Olympus E-M1 II in the real world.
See real-world photos taken with the E-M1 II.
Compare Olympus E-M1 II image quality against competitors.
What’s the bottom line? Read our Olympus E-M1 II conclusion.

Succeeded by the Pentax K-3 II
Compare K-3 vs K-3 II

Succeeded by the Olympus E-M1 Mark III
Compare E-M1 II vs E-M1 Mark III

Compare PENTAX K-3 II vs OLYMPUS E-M1 MARK III

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Differences

Pentax K-3 advantages over Olympus E-M1 II

Larger sensor
APS-C vs 4/3
More sensor area. Bigger is (generally) better.
Bigger pixels
~ 3.91 vs 3.36 microns
Better low-light and dynamic range (all else equal)
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 440 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 20.4 megapixels
Higher resolution photos
Optional anti-aliasing filter
Optional vs None
Lets you choose sharper photos or reduced moiré
Higher extended ISO
51200 vs 25600 ISO
Higher extended ISO can give more low-light flexibility

Olympus E-M1 II advantages over Pentax K-3

Tilt-swivel screen
Tilt-swivel vs none
Tilt and swivel the screen for maximum shooting flexibility
Shoot 4K video
4K (DCI) vs 1080p
Make sure you have a fast computer
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
On-sensor phase detect
Yes vs No
Usually improves live view and video AF performance
Newer
8 years vs 11 years old
Newer cameras often support more advanced features
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
60.6 fps vs 7.1 fps
Faster JPEG shooting (burst mode)
Faster RAW shooting
60.6 fps vs 7.1 fps
Faster RAW shooting in burst mode
Bigger RAW buffer
51 vs 24 shots
Larger buffer for RAW shots (burst mode)
Faster shutter
1/32000 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
Dual card slots
Both provide
Gives you more storage flexibility
Headphone jack
Both provide
Monitor audio recording while you shoot video
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
Slow-motion videos
Neither provide
Shoot slow-motion videos

User reviews

Amazon
Adorama
Read K-3 User Reviews

Amazon
Adorama
Read E-M1 II User Reviews

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Buy the Pentax K-3

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Body Only
Kit with 18-135mm Lens

All K-3 Deals

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Buy the Olympus E-M1 II

Body Only (Black)

All E-M1 II Deals

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 image quality; Very good dynamic range & high ISO performance; Fantastic C-AF performance; Incredible burst rates, even with RAW; 4K UHD & Cinema 4K (DCI) video; Clean HDMI; Dual SD card slots.
Expensive; Menus still confusing; UHS-II support only on one card slot; No optical low-pass filter means greater risk of moire; No built-in flash.
Read our Olympus E-M1 II Review

The Competition

Compared to Fujifilm X-T2

Pentax K-3

Fujifilm X-T2

$699
APS-C

Lens selection
In-Camera Image Stabilization

$999
APS-C

Shoot 4K video
In-camera panoramas

Compare Pentax K-3 vs Fujifilm X-T2

Olympus E-M1 II

Fujifilm X-T2

$899
4/3

Lens selection
Less expensive

$999
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M1 II vs Fujifilm X-T2

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-M1 II

Nikon D7100

$899
4/3

Tilt-swivel screen
Focus peaking

$745
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M1 II vs Nikon D7100

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-M1 II

Nikon D5300

$899
4/3

Focus peaking
In-Camera Image Stabilization

$549
APS-C

Less expensive
Larger sensor

Compare Olympus E-M1 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-M1 II

Nikon D7200

$899
4/3

Focus peaking
Less expensive

$1016
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M1 II vs Nikon D7200

Compared to Panasonic G7

Pentax K-3

Panasonic G7

$699
APS-C

Larger sensor
In-Camera Image Stabilization

$498
4/3

Tilt-swivel screen
Shoot 4K video

Compare Pentax K-3 vs Panasonic G7

Olympus E-M1 II

Panasonic G7

$899
4/3

In-Camera Image Stabilization
High resolution composite

$498
4/3

Less expensive
In-camera panoramas

Compare Olympus E-M1 II vs Panasonic G7

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