• APS-C 369.7mm2
  • 24.3 megapixels
  • ISO 100 - 16,000
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Sony A77 advantages over Olympus E-M10 II

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 530 vs 320 shots
    Capture more photos
  • 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 viewfinder magnification
    0.73x vs 0.62x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    24.3 vs 16.1 megapixels
    Higher resolution photos
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Wider angle kit lens
    24 mm vs 28 mm
    Capture more of the scene with the included lens
  • Faster JPEG shooting
    11.6 fps vs 8.9 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.6 fps vs 8.9 fps
    Faster RAW shooting in burst mode

Olympus E-M10 II advantages over Sony A77

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $550 vs $1899
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Thinner
    46 mm vs 80 mm
    Thinner
  • Newer
    9 years vs 13 years old
    Newer cameras often support more advanced features
  • Lighter weight
    488g vs 1363g
    Lighter weight
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Bigger JPEG buffer
    28 vs 17 shots
    Take more JPEG shots before waiting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/16000 vs 1/8000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    25600 vs 16000 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
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • 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

Common Weaknesses

  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

User reviews

Buy From

Your purchases support this site

Buy the Sony A77

Your purchases support this site

Buy the Olympus E-M10 II

Review Excerpt

  • Very fast top frame rate; full-time phase-detect autofocus; Full 60p HD video; Excellent kit lens; Very good high-resolution sensor.

  • Heavy; EVF appears dim when used in bright light; AF tracking in Movie mode was unreliable in our testing.

  • Excellent value for the money; Professional-grade ergonomics; Incredibly good image quality for its class; Solid performance specs across the board; Loaded with features.

  • Kit lens may not be quite as sharp as previous kit lens from this line; Below average battery life; Somewhat confusing menu systems.

The Competition

Compared to Canon 7D

Sony A77
Canon 7D
  • $1899
  • APS-C
  • Tilt-swivel screen
  • Focus peaking
  • $1499
  • APS-C
  • Lens selection
  • Less expensive
Olympus E-M10 II
Canon 7D
  • $349
  • 4/3
  • Less expensive
  • Focus peaking
  • $1499
  • APS-C
  • Larger sensor
  • Fast startup

Compared to Canon 70D

Sony A77
Canon 70D
  • $1899
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1149
  • APS-C
  • Lens selection
  • Less expensive
Olympus E-M10 II
Canon 70D
  • $349
  • 4/3
  • Focus peaking
  • Less expensive
  • $1149
  • APS-C
  • Larger sensor
  • Tilt-swivel screen

Compared to Olympus E-M10

Sony A77
Olympus E-M10
  • $1899
  • APS-C
  • Larger sensor
  • Tilt-swivel screen
  • $399
  • 4/3
  • Lens selection
  • Touchscreen
Olympus E-M10 II
Olympus E-M10
  • $349
  • 4/3
  • Fast startup
  • Shoots 24p video
  • $399
  • 4/3

Compared to Sony A77 II

Sony A77
Sony A77 II
  • $1899
  • APS-C
  • Built-in GPS
  • $1198
  • APS-C
  • Built-in Wi-Fi
  • NFC
Olympus E-M10 II
Sony A77 II
  • $349
  • 4/3
  • Lens selection
  • Less expensive
  • $1198
  • APS-C
  • Larger sensor
  • Tilt-swivel screen

Compared to Panasonic GX85

Sony A77
Panasonic GX85
  • $1899
  • APS-C
  • Tilt-swivel screen
  • Larger sensor
  • $598
  • 4/3
  • Lens selection
  • Less expensive
Olympus E-M10 II
Panasonic GX85
  • $349
  • 4/3
  • Higher effective ISO
  • More telephoto lens reach
  • $598
  • 4/3
  • Shoot 4K video
  • In-camera panoramas
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