• 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102,400
  • 4/3 226.2mm2
  • 20.4 megapixels
  • ISO 200 - 25,600

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Differences

Sony A7S II advantages over Olympus E-M1 Mark III

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 8.40 vs 3.36 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    409600 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-M1 Mark III advantages over Sony A7S II

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • 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
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Newer
    4 years vs 9 years old
    Newer cameras often support more advanced features
  • More pixels
    20.4 vs 12.2 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • 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
  • Shoot 4K video
    Both provide
    Make sure you have a fast computer
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • 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
  • 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

  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera

User reviews

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Buy the Olympus E-M1 Mark III
Body Only
  • Body Only
  • Kit with 12-100mm f/4 Lens
  • Kit with 12-40mm Lens
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Review Excerpt

  • Comfortable and surprisingly compact camera body; Improved low light performance; Built-in image stabilization; Wide range of usable ISOs; More sophisticated autofocus performance; Excellent video capabilities.

  • Relatively low resolution; Mediocre continuous shooting performance; No built-in flash; No losslessly compressed RAW option.

  • Read our Sony A7S II Review

The Competition

Compared to Sony A7S

Sony A7S II
Sony A7S
  • $2398
  • 35mm
  • In-Camera Image Stabilization
  • Shoot 4K video
  • $1998
  • 35mm
  • Less expensive
  • Fast startup

Compare Sony A7S II vs Sony A7S

Olympus E-M1 Mark III
Sony A7S
  • $1649
  • 4/3
  • Tilt-swivel screen
  • Lens selection
  • $1998
  • 35mm
  • Less expensive
  • Larger sensor

Compare Olympus E-M1 Mark III vs Sony A7S

Compared to Olympus E-M1 II

Sony A7S II
Olympus E-M1 II
  • $2398
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1324
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A7S II vs Olympus E-M1 II

Olympus E-M1 Mark III
Olympus E-M1 II
  • $1649
  • 4/3
  • Newer
  • $1324
  • 4/3
  • Less expensive

Compare Olympus E-M1 Mark III vs Olympus E-M1 II

Compared to Sony A9

Sony A7S II
Sony A9
  • $2398
  • 35mm
  • Less expensive
  • Bigger pixels
  • $3147
  • 35mm
  • Touchscreen
  • Fast startup

Compare Sony A7S II vs Sony A9

Olympus E-M1 Mark III
Sony A9
  • $1649
  • 4/3
  • Lens selection
  • Less expensive
  • $3147
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M1 Mark III vs Sony A9

Compared to Sony A7S III

Sony A7S II
Sony A7S III
  • $2398
  • 35mm
  • Less expensive
  • $3498
  • 35mm
  • Tilt-swivel screen
  • Slower slow-motion

Compare Sony A7S II vs Sony A7S III

Olympus E-M1 Mark III
Sony A7S III
  • $1649
  • 4/3
  • Lens selection
  • Less expensive
  • $3498
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M1 Mark III vs Sony A7S III

Compared to OM System OM-1

Sony A7S II
OM System OM-1
  • $2398
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $2200
  • 4/3
  • Lens selection
  • Tilt-swivel screen

Compare Sony A7S II vs OM System OM-1

Olympus E-M1 Mark III
OM System OM-1
  • $1649
  • 4/3
  • $2200
  • 4/3
  • Newer
  • Higher-res screen

Compare Olympus E-M1 Mark III vs OM System OM-1

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