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

Buy From

Differences

Olympus E-M10 III advantages over Sony A7 IV

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $799 vs $2265
    Save money for lenses or accessories
  • More telephoto lens reach
    84 mm vs 70 mm
    Capture objects farther away with the kit lens
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    49 mm vs 79 mm
    Thinner
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Bigger JPEG buffer
    Unlimited vs 828 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster shutter
    1/16000 vs 1/8000 sec
    Shoot wide open in bright light

Sony A7 IV advantages over Olympus E-M10 III

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.12 vs 3.78 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
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Newer
    3 years vs 7 years old
    Newer cameras often support more advanced features
  • More dots on screen
    3680k vs 1037k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    33.0 vs 16.1 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
  • Faster JPEG shooting
    10.0 fps vs 8.6 fps
    Faster JPEG shooting (burst mode)
  • 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
  • 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
  • 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
  • Slow-motion videos
    Both provide
    Shoot slow-motion videos

Common Weaknesses

  • 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

User reviews

Buy From

Your purchases support this site

Buy the Olympus E-M10 III
Body Only (Black)
  • Body Only (Black)
  • Body Only (Silver)
  • Kit with 14-42mm EZ lens (Black)
  • Kit with 14-42mm EZ lens (Silver)
All E-M10 III Deals

Your purchases support this site

Buy the Sony A7 IV
Body Only
  • Body Only
  • Kit with 28-70mm Lens
All A7 IV Deals

Review Excerpt

  • Superbly-built, comfortable and compact body; Pairs beautifully with pancake kit lens; Excellent image quality; Excellent performance in most respects; Great single-shot autofocus; Really nice viewfinder and touch-screen display; Friendlier user interface courts amateurs.

  • Some controls are a bit small and tightly-packed; Hand grips are still a bit modestly-sized for larger lenses; Continuous and video autofocus just isn't up to snuff; New user interface can feel limiting to advanced photographers; Underwhelming battery life.

  • Read our Olympus E-M10 III Review

The Competition

Compared to Olympus E-M5 II

Olympus E-M10 III
Olympus E-M5 II
  • $549
  • 4/3
  • Shoot 4K video
  • Internal flash
  • $899
  • 4/3
  • Tilt-swivel screen
  • High resolution composite

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

Sony A7 IV
Olympus E-M5 II
  • $2231
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $899
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A7 IV vs Olympus E-M5 II

Compared to Olympus E-M10 II

Olympus E-M10 III
Olympus E-M10 II
  • $549
  • 4/3
  • Shoot 4K video
  • Bigger JPEG buffer
  • $349
  • 4/3
  • Less expensive

Compare Olympus E-M10 III vs Olympus E-M10 II

Sony A7 IV
Olympus E-M10 II
  • $2231
  • 35mm
  • Larger sensor
  • Tilt-swivel screen
  • $349
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A7 IV vs Olympus E-M10 II

Compared to Panasonic GX85

Olympus E-M10 III
Panasonic GX85
  • $549
  • 4/3
  • More telephoto lens reach
  • Higher max flash sync
  • $598
  • 4/3
  • Less expensive
  • In-camera panoramas

Compare Olympus E-M10 III vs Panasonic GX85

Sony A7 IV
Panasonic GX85
  • $2231
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
  • $598
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A7 IV vs Panasonic GX85

Compared to Nikon Z7 II

Olympus E-M10 III
Nikon Z7 II
  • $549
  • 4/3
  • Less expensive
  • More telephoto lens reach
  • $2497
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M10 III vs Nikon Z7 II

Sony A7 IV
Nikon Z7 II
  • $2231
  • 35mm
  • Tilt-swivel screen
  • Bigger pixels
  • $2497
  • 35mm
  • On-sensor phase detect
  • Top deck display

Compare Sony A7 IV vs Nikon Z7 II

Compared to Canon R6 Mark II

Olympus E-M10 III
Canon R6 Mark II
  • $549
  • 4/3
  • Less expensive
  • Internal flash
  • $2432
  • 35mm
  • Larger sensor
  • Tilt-swivel screen

Compare Olympus E-M10 III vs Canon R6 Mark II

Sony A7 IV
Canon R6 Mark II
  • $2231
  • 35mm
  • In-camera panoramas
  • NFC
  • $2432
  • 35mm
  • Slower slow-motion
  • Bigger pixels

Compare Sony A7 IV vs Canon R6 Mark II

Compare Other Cameras?