• 35mm 861.6mm2
  • 36.3 megapixels
  • ISO 64 - 12,800
  • 4/3 226.2mm2
  • 20.4 megapixels
  • ISO 200 - 6400

Buy From

Differences

Nikon D810 advantages over Olympus E-M5 III

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 4.88 vs 3.36 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 1200 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
    36.3 vs 20.4 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
  • Bigger JPEG buffer
    57 vs 26 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    51200 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-M5 III advantages over Nikon D810

  • Less expensive
    $1099 vs $2079
    Save money for lenses or accessories
  • 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
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    49 mm vs 81 mm
    Thinner
  • Newer
    5 years vs 10 years old
    Newer cameras often support more advanced features
  • Lighter weight
    414g vs 988g
    Lighter weight
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    30.0 fps vs 5.1 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    30.0 fps vs 5.1 fps
    Faster RAW shooting in burst mode
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/32000 vs 1/8000 sec
    Shoot wide open in bright light

Similarities

Common Strengths

  • 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 GPS
    Neither provide
    Geotag your photos

User reviews

Buy From

Your purchases support this site

Buy the Nikon D810
Body Only
  • Body Only
  • Kit with 24-120mm lens
All D810 Deals

Your purchases support this site

Buy the Olympus E-M5 III
Body Only (Black)
  • Body Only (Black)
  • Body Only (Silver)
  • Kit with 14-150mm Lens (Black)
  • Kit with 14-150mm Lens (Silver)
All E-M5 III Deals

Review Excerpt

  • Handles even better than its predecessors; Absolutely spectacular images from the 36-megapixel image sensor; Unusually wide sensitivity range for its resolution; Improved performance and buffer depths; Improved video feature set; Impressive low-light autofocus

  • Prone to moire and false color with some subjects; No longer available with a low-pass filter; Demands excellent lenses for the best detail; White balance tends warm under tungsten lighting

  • Read our Nikon D810 Review

  • Improved image quality; Very good dynamic range & high ISO performance for a modern MFT sensor; Very fast AF; Excellent image stabilization; 4K video recording; Weather-sealed build quality.

  • Below average battery life; Small size can be awkward with long, heavy lenses; One SD card slot.

  • Read our Olympus E-M5 III Review

The Competition

Compared to Canon 5D Mark IV

Nikon D810
Canon 5D Mark IV
  • $2291
  • 35mm
  • Less expensive
  • Longer stills battery life
  • $2349
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compare Nikon D810 vs Canon 5D Mark IV

Olympus E-M5 III
Canon 5D Mark IV
  • $924
  • 4/3
  • Focus peaking
  • Less expensive
  • $2349
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Canon 5D Mark IV

Compared to Nikon D800

Nikon D810
Nikon D800
  • $2291
  • 35mm
  • Longer stills battery life
  • Lacks anti-aliasing filter
  • $1850
  • 35mm
  • Fast startup
  • Has anti-aliasing filter

Compare Nikon D810 vs Nikon D800

Olympus E-M5 III
Nikon D800
  • $924
  • 4/3
  • Focus peaking
  • Tilt-swivel screen
  • $1850
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Nikon D800

Compared to Nikon D800E

Nikon D810
Nikon D800E
  • $2291
  • 35mm
  • Longer stills battery life
  • Faster JPEG shooting
  • $2212
  • 35mm
  • Fast startup

Compare Nikon D810 vs Nikon D800E

Olympus E-M5 III
Nikon D800E
  • $924
  • 4/3
  • Focus peaking
  • Tilt-swivel screen
  • $2212
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Nikon D800E

Compared to Panasonic G100

Nikon D810
Panasonic G100
  • $2291
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $599
  • 4/3
  • Focus peaking
  • Less expensive

Compare Nikon D810 vs Panasonic G100

Olympus E-M5 III
Panasonic G100
  • $924
  • 4/3
  • In-Camera Image Stabilization
  • High resolution composite
  • $599
  • 4/3
  • Less expensive
  • In-camera panoramas

Compare Olympus E-M5 III vs Panasonic G100

Compared to Olympus E-M10 IV

Nikon D810
Olympus E-M10 IV
  • $2291
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $649
  • 4/3
  • Focus peaking
  • Less expensive

Compare Nikon D810 vs Olympus E-M10 IV

Olympus E-M5 III
Olympus E-M10 IV
  • $924
  • 4/3
  • Tilt-swivel screen
  • High resolution composite
  • $649
  • 4/3
  • Less expensive
  • Longer video battery life

Compare Olympus E-M5 III vs Olympus E-M10 IV

Compare Other Cameras?