• APS-C 369.7mm2
  • 16.1 megapixels
  • ISO 100 - 16,000
  • 4/3 226.2mm2
  • 20.4 megapixels
  • ISO 200 - 6400

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Differences

Sony A57 advantages over Olympus E-M5 III

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 4.82 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
  • Longer stills battery life
    More info 550 vs 310 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos

Olympus E-M5 III advantages over Sony A57

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Shoot 4K video
    4K (DCI) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    49 mm vs 80 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/250 vs 1/160 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    5 years vs 13 years old
    Newer cameras often support more advanced features
  • More pixels
    20.4 vs 16.1 megapixels
    Higher resolution photos
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    30.0 fps vs 10.0 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/32000 vs 1/4000 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
  • 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 GPS
    Neither provide
    Geotag your photos
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

User reviews

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Buy the Sony A57

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Buy the Olympus E-M5 III
Body Only (Black)
  • Body Only (Black)
  • Body Only (Silver)
  • Kit with 14-150mm Lens (Black)
  • Kit with 14-150mm Lens (Silver)
All E-M5 III Deals

Review Excerpt

  • Improved image quality; Very good dynamic range & high ISO performance for a modern MFT sensor; Very fast AF; Excellent image stabilization; 4K video recording; Weather-sealed build quality.

  • Below average battery life; Small size can be awkward with long, heavy lenses; One SD card slot.

  • Read our Olympus E-M5 III Review

The Competition

Compared to Nikon D5100

Sony A57
Nikon D5100
  • $800
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $650
  • APS-C
  • Lens selection
  • Tilt-swivel screen

Compare Sony A57 vs Nikon D5100

Olympus E-M5 III
Nikon D5100
  • $924
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $650
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Nikon D5100

Compared to Sony A37

Sony A57
Sony A37
  • $800
  • APS-C
  • Longer stills battery life
  • Higher-res screen
  • $600
  • APS-C
  • Less expensive
  • External Mic Jack

Compare Sony A57 vs Sony A37

Olympus E-M5 III
Sony A37
  • $924
  • 4/3
  • Lens selection
  • Tilt-swivel screen
  • $600
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Sony A37

Compared to Pentax K-5 IIs

Sony A57
Pentax K-5 IIs
  • $800
  • APS-C
  • Less expensive
  • Focus peaking
  • $497
  • APS-C
  • Lens selection
  • Higher effective ISO

Compare Sony A57 vs Pentax K-5 IIs

Olympus E-M5 III
Pentax K-5 IIs
  • $924
  • 4/3
  • Focus peaking
  • Tilt-swivel screen
  • $497
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Olympus E-M5 III vs Pentax K-5 IIs

Compared to Panasonic G100

Sony A57
Panasonic G100
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $599
  • 4/3
  • Tilt-swivel screen
  • Lens selection

Compare Sony A57 vs Panasonic G100

Olympus E-M5 III
Panasonic G100
  • $924
  • 4/3
  • In-Camera Image Stabilization
  • High resolution composite
  • $599
  • 4/3
  • Less expensive
  • In-camera panoramas

Compare Olympus E-M5 III vs Panasonic G100

Compared to Olympus E-M10 IV

Sony A57
Olympus E-M10 IV
  • $800
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $630
  • 4/3
  • Lens selection
  • Shoot 4K video

Compare Sony A57 vs Olympus E-M10 IV

Olympus E-M5 III
Olympus E-M10 IV
  • $924
  • 4/3
  • Tilt-swivel screen
  • High resolution composite
  • $630
  • 4/3
  • Less expensive
  • Longer video battery life

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

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