Nikon D5100 vs Olympus E-M5 II

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Nikon D5100 vs Olympus E-M5 II

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APS-C 368.2mm²
16.2 megapixels
ISO 100 - 6400

Go in depth with our full Nikon D5100 Review.
See real-world photos taken with the D5100.

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 Nikon D5200
Compare D5100 vs D5200

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

Compare NIKON D5200 vs OLYMPUS E-M5 III

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Differences

Nikon D5100 advantages over Olympus E-M5 II

Larger sensor
APS-C vs 4/3
More sensor area. Bigger is (generally) better.
Less expensive
$650 vs $899
Save money for lenses or accessories
Bigger pixels
~ 4.79 vs 3.75 microns
Better low-light and dynamic range (all else equal)
Fast startup
~0.50 vs 0.8 sec
Faster startup lets you catch the moment
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.
D5100 test data on DxO Mark E-M5 II test data on DxO Mark

1,183 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

660 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
Bigger JPEG buffer
100 vs 18 shots
Take more JPEG shots before waiting (burst mode)

Olympus E-M5 II advantages over Nikon D5100

Focus peaking
Peaker vs Non-peaker
Your camera will highlight what's in focus
In-Camera Image Stabilization
Yes vs No
Reduces the effects of camera shake at slower shutter speeds
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 79 mm
Thinner
Less shutter lag
0.14 vs 0.27 sec
Focus and take a photo quickly (wide angle)
More viewfinder magnification
0.74x vs 0.52x
Get a bigger view of the scene through the eye-level viewfinder
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 3.9 fps
Faster JPEG shooting (burst mode)
Faster RAW shooting
10.4 fps vs 4.0 fps
Faster RAW shooting in burst mode
Faster shutter
1/16000 vs 1/4000 sec
Shoot wide open in bright light

Similarities

Common Strengths

Tilt-swivel screen
Both provide
Tilt and swivel the screen for maximum shooting flexibility
Eye-level viewfinder
Both provide
You'll be able to frame photos even when the sun is out
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
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 D5100 User Reviews

Amazon
Adorama
Read E-M5 II User Reviews

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Review Excerpt

Side-mounted tilt / swivel LCD screen; same sensor and processing as the Nikon D7000; good speed and battery life; in-camera HDR and filter effects; Full HD video capture with aperture control; audio levels control and external microphone jack.
AF-S lens mount doesn't offer autofocus with screw-drive lenses; popup flash isn't the greatest; no built-in wireless flash control; HDR function doesn't microalign source images.
Read our Nikon D5100 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 A55

Nikon D5100

Sony A55

$650
APS-C

Lens selection
Tilt-swivel screen

$734
APS-C

In-Camera Image Stabilization
In-camera panoramas

Compare Nikon D5100 vs Sony A55

Olympus E-M5 II

Sony A55

$899
4/3

Tilt-swivel screen
Lens selection

$734
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Sony A55

Compared to Sony A33

Nikon D5100

Sony A33

$650
APS-C

Lens selection
Tilt-swivel screen

$540
APS-C

In-Camera Image Stabilization
In-camera panoramas

Compare Nikon D5100 vs Sony A33

Olympus E-M5 II

Sony A33

$899
4/3

Tilt-swivel screen
Lens selection

$540
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Sony A33

Compared to Sony A57

Nikon D5100

Sony A57

$650
APS-C

Lens selection
Tilt-swivel screen

$800
APS-C

Focus peaking
In-Camera Image Stabilization

Compare Nikon D5100 vs Sony A57

Olympus E-M5 II

Sony A57

$899
4/3

Lens selection
Tilt-swivel screen

$800
APS-C

Larger sensor
Bigger pixels

Compare Olympus E-M5 II vs Sony A57

Compared to Panasonic GX7

Nikon D5100

Panasonic GX7

$650
APS-C

Tilt-swivel screen
Larger sensor

$648
4/3

Focus peaking
In-Camera Image Stabilization

Compare Nikon D5100 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

Nikon D5100

Panasonic GX85

$650
APS-C

Larger sensor
Tilt-swivel screen

$598
4/3

Focus peaking
In-Camera Image Stabilization

Compare Nikon D5100 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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