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

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Differences

Sony A99 II advantages over Olympus E-M10 IV

  • 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
    ~ 4.51 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
  • Longer video battery life
    135 vs 80 minutes
    Capture more video
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • More pixels
    42.4 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
  • Higher extended ISO
    102400 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-M10 IV advantages over Sony A99 II

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $699 vs $3198*
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    49 mm vs 76 mm
    Thinner
  • Newer
    4 years vs 8 years old
    Newer cameras often support more advanced features
  • Lighter weight
    383g vs 849g
    Lighter weight
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster shutter
    1/16000 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
  • 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

  • Built-in GPS
    Neither provide
    Geotag your photos

User reviews

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Buy the Sony A99 II
Body Only
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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

Review Excerpt

  • Superb image quality at low, moderate ISOs; Improved high ISO performance; Fast continuous shooting speeds; Very impressive hybrid autofocus; High-quality 4K UHD video; Rugged camera body.

  • Multi-selector joystick can be awkward to use; No EVF live view at fastest burst rate; Buffer clearing is slow with no UHS-II support; 4K UHD video isn't as full-featured as E-mount counterparts.

  • Read our Sony A99 II Review

The Competition

Compared to Canon 5D Mark IV

Sony A99 II
Canon 5D Mark IV
  • $3198
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $2249
  • 35mm
  • Lens selection
  • Bigger pixels

Compare Sony A99 II vs Canon 5D Mark IV

Olympus E-M10 IV
Canon 5D Mark IV
  • $630
  • 4/3
  • Focus peaking
  • Less expensive
  • $2249
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M10 IV vs Canon 5D Mark IV

Compared to Nikon D850

Sony A99 II
Nikon D850
  • $3198
  • 35mm
  • Tilt-swivel screen
  • In-Camera Image Stabilization
  • $2597
  • 35mm
  • Lens selection
  • Less expensive

Compare Sony A99 II vs Nikon D850

Olympus E-M10 IV
Nikon D850
  • $630
  • 4/3
  • Less expensive
  • In-Camera Image Stabilization
  • $2597
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M10 IV vs Nikon D850

Compared to Pentax K-1 II

Sony A99 II
Pentax K-1 II
  • $3198
  • 35mm
  • Tilt-swivel screen
  • Shoot 4K video
  • $1747
  • 35mm
  • Lens selection
  • Less expensive

Compare Sony A99 II vs Pentax K-1 II

Olympus E-M10 IV
Pentax K-1 II
  • $630
  • 4/3
  • Less expensive
  • Shoot 4K video
  • $1747
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M10 IV vs Pentax K-1 II

Compared to Olympus E-M5 III

Sony A99 II
Olympus E-M5 III
  • $3198
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $924
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A99 II vs Olympus E-M5 III

Olympus E-M10 IV
Olympus E-M5 III
  • $630
  • 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

Compared to Panasonic G100

Sony A99 II
Panasonic G100
  • $3198
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
  • $599
  • 4/3
  • Lens selection
  • Less expensive

Compare Sony A99 II vs Panasonic G100

Olympus E-M10 IV
Panasonic G100
  • $630
  • 4/3
  • In-Camera Image Stabilization
  • More telephoto lens reach
  • $599
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compare Olympus E-M10 IV vs Panasonic G100

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