• APS-C 369.7mm2
  • 24.3 megapixels
  • ISO 100 - 16,000
  • 4/3 226.2mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Sony A77 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
    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 330 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 8.6 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.6 fps vs 8.6 fps
    Faster RAW shooting in burst mode

Olympus E-M10 III advantages over Sony A77

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • 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
    49 mm vs 80 mm
    Thinner
  • Newer
    5 years vs 11 years old
    Newer cameras often support more advanced features
  • Lighter weight
    503g 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
    Unlimited vs 17 shots
    Take more JPEG shots before waiting (burst mode)
  • Bigger RAW buffer
    33 vs 14 shots
    Larger buffer for RAW shots (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 III

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.

  • 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.

The Competition

Compared to Canon 60D

Sony A77
Canon 60D
  • $1296
  • APS-C
  • Focus peaking
  • Larger sensor
  • $899
  • APS-C
  • Lens selection
  • Fast startup
Olympus E-M10 III
Canon 60D
  • $549
  • 4/3
  • Focus peaking
  • Less expensive
  • $899
  • APS-C
  • Tilt-swivel screen
  • Larger sensor

Compared to Nikon D7100

Sony A77
Nikon D7100
  • $1296
  • APS-C
  • Focus peaking
  • Tilt-swivel screen
  • $810
  • APS-C
  • Lens selection
  • Fast startup
Olympus E-M10 III
Nikon D7100
  • $549
  • 4/3
  • Focus peaking
  • Less expensive
  • $810
  • APS-C
  • Larger sensor
  • Fast startup

Compared to Canon 70D

Sony A77
Canon 70D
  • $1296
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $999
  • APS-C
  • Lens selection
  • Touchscreen
Olympus E-M10 III
Canon 70D
  • $549
  • 4/3
  • Less expensive
  • Focus peaking
  • $999
  • APS-C
  • Tilt-swivel screen
  • Larger sensor

Compared to Olympus E-M10 II

Sony A77
Olympus E-M10 II
  • $1296
  • APS-C
  • Tilt-swivel screen
  • Larger sensor
  • $349
  • 4/3
  • Lens selection
  • Touchscreen
Olympus E-M10 III
Olympus E-M10 II
  • $549
  • 4/3
  • Shoot 4K video
  • Newer
  • $349
  • 4/3
  • Less expensive

Compared to Panasonic GX85

Sony A77
Panasonic GX85
  • $1296
  • APS-C
  • Tilt-swivel screen
  • Larger sensor
  • $598
  • 4/3
  • Lens selection
  • Shoot 4K video
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
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