• 35mm 858.0mm2
  • 24.5 megapixels
  • ISO 100 - 51,200
  • 4/3 226.2mm2
  • 20.4 megapixels
  • ISO 200 - 25,600

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Differences

Nikon D780 advantages over Olympus E-M1 Mark III

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.94 vs 3.36 microns
    Better low-light and dynamic range (all else equal)
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Higher-res screen
    786k vs 346k pixels
    More detail on the screen lets you judge focus and composition
  • More pixels
    24.5 vs 20.4 megapixels
    Higher resolution photos
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Longer exposure
    900 vs 60 sec
    Long exposures for night shots
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    204800 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-M1 Mark III advantages over Nikon D780

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Lighter weight
    580g vs 840g
    Lighter weight
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • 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
  • Shoot 4K video
    Both provide
    Make sure you have a fast computer
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • On-sensor phase detect
    Both provide
    Usually improves live view and video AF performance
  • 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 GPS
    Neither provide
    Geotag your photos
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash

User reviews

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Your purchases support this site

Buy the Olympus E-M1 Mark III

Review Excerpt

The Competition

Compared to Canon 5D Mark IV

Nikon D780
Canon 5D Mark IV
  • $2097
  • 35mm
  • Focus peaking
  • Less expensive
  • $2499
  • 35mm
  • NFC
  • Built-in GPS
Olympus E-M1 Mark III
Canon 5D Mark IV
  • $1649
  • 4/3
  • Less expensive
  • Tilt-swivel screen
  • $2499
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Olympus E-M1 II

Nikon D780
Olympus E-M1 II
  • $2097
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1324
  • 4/3
  • Less expensive
  • Tilt-swivel screen
Olympus E-M1 Mark III
Olympus E-M1 II
  • $1649
  • 4/3
  • Newer
  • $1324
  • 4/3
  • Less expensive

Compared to Nikon D850

Nikon D780
Nikon D850
  • $2097
  • 35mm
  • Bigger pixels
  • On-sensor phase detect
  • $2664
  • 35mm
  • More cross-type AF points
  • More pixels
Olympus E-M1 Mark III
Nikon D850
  • $1649
  • 4/3
  • Tilt-swivel screen
  • In-Camera Image Stabilization
  • $2664
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Pentax K-1 II

Nikon D780
Pentax K-1 II
  • $2097
  • 35mm
  • Bigger pixels
  • Shoot 4K video
  • $1747
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
Olympus E-M1 Mark III
Pentax K-1 II
  • $1649
  • 4/3
  • Tilt-swivel screen
  • Shoot 4K video
  • $1747
  • 35mm
  • Less expensive
  • Larger sensor

Compared to OM System OM-1

Nikon D780
OM System OM-1
  • $2097
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $2200
  • 4/3
  • Tilt-swivel screen
  • In-Camera Image Stabilization
Olympus E-M1 Mark III
OM System OM-1
  • $1649
  • 4/3
  • $2200
  • 4/3
  • Newer
  • Higher-res screen
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