• 4/3 226.2mm2
  • 20.4 megapixels
  • ISO 200 - 25,600
  • 35mm 847.3mm2
  • 24.2 megapixels
  • ISO 100 - 51,200

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Differences

Olympus E-M1 Mark III advantages over Panasonic S5 II

  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Faster shutter
    1/32000 vs 1/8000 sec
    Shoot wide open in bright light

Panasonic S5 II advantages over Olympus E-M1 Mark III

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.93 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
  • Newer
    2 years vs 5 years old
    Newer cameras often support more advanced features
  • Higher-res screen
    613k vs 346k pixels
    More detail on the screen lets you judge focus and composition
  • More pixels
    24.2 vs 20.4 megapixels
    Higher resolution photos
  • 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

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • 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
  • 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
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • 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
  • 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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Review Excerpt

The Competition

Compared to Olympus E-M1 II

Olympus E-M1 Mark III
Olympus E-M1 II
  • $1699
  • 4/3
  • Newer
  • $899
  • 4/3
  • Less expensive
Panasonic S5 II
Olympus E-M1 II
  • $2000
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $899
  • 4/3
  • On-sensor phase detect
  • Faster JPEG shooting

Compared to Panasonic G95

Olympus E-M1 Mark III
Panasonic G95
  • $1699
  • 4/3
  • High resolution composite
  • On-sensor phase detect
  • $848
  • 4/3
  • Less expensive
  • In-camera panoramas
Panasonic S5 II
Panasonic G95
  • $2000
  • 35mm
  • Larger sensor
  • Slower slow-motion
  • $848
  • 4/3
  • In-camera panoramas
  • Internal flash

Compared to Nikon Z5

Olympus E-M1 Mark III
Nikon Z5
  • $1699
  • 4/3
  • Tilt-swivel screen
  • High resolution composite
  • $1097
  • 35mm
  • Less expensive
  • Larger sensor
Panasonic S5 II
Nikon Z5
  • $2000
  • 35mm
  • Tilt-swivel screen
  • High resolution composite
  • $1097
  • 35mm
  • On-sensor phase detect
  • Has anti-aliasing filter

Compared to OM System OM-1

Olympus E-M1 Mark III
OM System OM-1
  • $1699
  • 4/3
  • $2200
  • 4/3
  • Newer
  • Higher-res screen
Panasonic S5 II
OM System OM-1
  • $2000
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $2200
  • 4/3
  • On-sensor phase detect
  • Lighter weight

Compared to Panasonic S5 IIX

Olympus E-M1 Mark III
Panasonic S5 IIX
  • $1699
  • 4/3
  • On-sensor phase detect
  • Faster shutter
  • $2200
  • 35mm
  • Larger sensor
  • Bigger pixels
Panasonic S5 II
Panasonic S5 IIX
  • $2000
  • 35mm
  • $2200
  • 35mm
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