• 4/3 226.2mm2
  • 20.3 megapixels
  • ISO 200 - 25,600
  • 35mm 861.6mm2
  • 50.1 megapixels
  • ISO 100 - 32,000

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Differences

Olympus E-M10 IV advantages over Sony A1

  • Less expensive
    $699 vs $6498*
    Save money for lenses or accessories
  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    49 mm vs 80 mm
    Thinner
  • Lighter weight
    383g vs 737g
    Lighter weight
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots

Sony A1 advantages over Olympus E-M10 IV

  • Slower slow-motion
    240 fps vs 120 fps
    Supports slower slow-mo
  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 4.16 vs 3.36 microns
    Better low-light and dynamic range (all else equal)
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Longer video battery life
    150 vs 80 minutes
    Capture more video
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/400 vs 1/250 sec
    Reduce the effect of ambient light in flash shots
  • More pixels
    50.1 vs 20.3 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 shutter
    1/32000 vs 1/16000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 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
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Both provide
    Always-on wireless connectivity
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera

User reviews

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Your purchases support this site

Buy the Olympus E-M10 IV
Body Only
  • Body Only
  • Kit with 14-42mm Lens
All E-M10 IV Deals

Your purchases support this site

Buy the Sony A1
Body Only
All A1 Deals

Review Excerpt

The Competition

Compared to Olympus E-M5 III

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

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

Sony A1
Olympus E-M5 III
  • $6499
  • 35mm
  • Larger sensor
  • Slower slow-motion
  • $924
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A1 vs Olympus E-M5 III

Compared to Olympus E-PL10

Olympus E-M10 IV
Olympus E-PL10
  • $649
  • 4/3
  • Eye-level viewfinder
  • More pixels
  • $549
  • 4/3
  • Less expensive
  • In-camera panoramas

Compare Olympus E-M10 IV vs Olympus E-PL10

Sony A1
Olympus E-PL10
  • $6499
  • 35mm
  • Larger sensor
  • Slower slow-motion
  • $549
  • 4/3
  • Less expensive
  • Lens selection

Compare Sony A1 vs Olympus E-PL10

Compared to Canon R5

Olympus E-M10 IV
Canon R5
  • $649
  • 4/3
  • Less expensive
  • Internal flash
  • $3549
  • 35mm
  • Larger sensor
  • Tilt-swivel screen

Compare Olympus E-M10 IV vs Canon R5

Sony A1
Canon R5
  • $6499
  • 35mm
  • Slower slow-motion
  • NFC
  • $3549
  • 35mm
  • Less expensive
  • Tilt-swivel screen

Compare Sony A1 vs Canon R5

Compared to Panasonic G100

Olympus E-M10 IV
Panasonic G100
  • $649
  • 4/3
  • In-Camera Image Stabilization
  • More telephoto lens reach
  • $623
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compare Olympus E-M10 IV vs Panasonic G100

Sony A1
Panasonic G100
  • $6499
  • 35mm
  • Slower slow-motion
  • Larger sensor
  • $623
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compare Sony A1 vs Panasonic G100

Compared to Nikon Z7 II

Olympus E-M10 IV
Nikon Z7 II
  • $649
  • 4/3
  • Less expensive
  • More telephoto lens reach
  • $2730
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M10 IV vs Nikon Z7 II

Sony A1
Nikon Z7 II
  • $6499
  • 35mm
  • Slower slow-motion
  • NFC
  • $2730
  • 35mm
  • Less expensive
  • Top deck display

Compare Sony A1 vs Nikon Z7 II

Compare Other Cameras?