• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Sony A7 advantages over Olympus E-M10

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Bigger pixels
    ~ 5.97 vs 3.75 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Higher effective ISO
    2,248 vs 884 iso
    Take photos in low light with less noise
  • More dynamic range
    14.2 vs 12.3 evs
    Retain detail in highlight and shadows
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • More viewfinder magnification
    0.71x vs 0.58x
    Get a bigger view of the scene through the eye-level viewfinder
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • More pixels
    24.3 vs 16.1 megapixels
    Higher resolution photos
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Bigger JPEG buffer
    50 vs 19 shots
    Take more JPEG shots before waiting (burst mode)
  • Bigger RAW buffer
    28 vs 15 shots
    Larger buffer for RAW shots (burst mode)
  • Higher extended ISO
    51200 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Olympus E-M10 advantages over Sony A7

  • Less expensive
    $699 vs $1498
    Save money for lenses or accessories
  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Fast startup
    ~1.30 vs 2.1 sec
    Faster startup lets you catch the moment
  • Touchscreen
    Touch vs No touch
    Select your focus point more intuitively.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Lighter weight
    515g vs 769g
    Lighter weight
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    8.1 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    8.1 fps vs 5.0 fps
    Faster RAW shooting in burst mode
  • More kit lens zoom
    3.0x vs 2.5x
    Zooming is easier than walking

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • HDMI out
    Both provide
    Use an external screen 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Your purchases support this site

Review Excerpt

  • Incredibly small body for a fully-featured, full-frame camera; Very high resolution; Hybrid autofocus is reasonably fast and confident; Significantly better burst-shooting performance than A7R; Excellent image quality even at very high sensitivities; Faster x-sync than A7R; Accepts existing Alpha-mount and E-mount lenses, and can optionally crop to APS-C image circle.

  • Grass-is-greener syndrome when compared to its higher-res sibling; Moderate performance; Loud shutter (but electronic first-curtain helps); Mediocre battery life when using electronic viewfinder; Weak low-light autofocus considering its price; Limited selection of native Sony FE lenses.

  • Great image quality especially from RAW files; Excellent dynamic range for a Four Thirds sensor; Very good high ISO performance; Realistic colors and excellent hue accuracy; Built-in Wi-Fi with remote control and sharing features; Improved HD video; Lightweight and very portable; Built-in pop-up flash; Minimal EVF lag time.

  • Contrast-Detect AF struggles with small and low-contrast subjects; Mediocre battery life; No external microphone or headphone jack; Mediocre burst speed with continuous AF; No weather sealing; Heavy-handed high ISO noise reduction.

The Competition

Compared to Sony A7R

Sony A7
Sony A7R
  • $1191
  • 35mm
  • Less expensive
  • Bigger pixels
  • $1887
  • 35mm
  • Higher effective ISO
  • More pixels
Olympus E-M10
Sony A7R
  • $595
  • 4/3
  • Less expensive
  • Lens selection
  • $1887
  • 35mm
  • Larger sensor
  • NFC

Compared to Leica M-E

Sony A7
Leica M-E
  • $1191
  • 35mm
  • Lens selection
  • Less expensive
  • $4790
  • 35mm
  • Bigger pixels
  • Thinner
Olympus E-M10
Leica M-E
  • $595
  • 4/3
  • Less expensive
  • Lens selection
  • $4790
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Panasonic GX7

Sony A7
Panasonic GX7
  • $1191
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $515
  • 4/3
  • Less expensive
  • Lens selection
Olympus E-M10
Panasonic GX7
  • $595
  • 4/3
  • Higher effective ISO
  • Bigger RAW buffer
  • $515
  • 4/3
  • Fast startup
  • In-camera panoramas

Compared to Sony A7 II

Sony A7
Sony A7 II
  • $1191
  • 35mm
  • Less expensive
  • $1688
  • 35mm
  • In-Camera Image Stabilization
  • Newer
Olympus E-M10
Sony A7 II
  • $595
  • 4/3
  • Less expensive
  • Lens selection
  • $1688
  • 35mm
  • Larger sensor
  • NFC

Compared to Olympus E-M5 II

Sony A7
Olympus E-M5 II
  • $1191
  • 35mm
  • Larger sensor
  • NFC
  • $1092
  • 4/3
  • Lens selection
  • Tilt-swivel screen
Olympus E-M10
Olympus E-M5 II
  • $595
  • 4/3
  • Less expensive
  • Internal flash
  • $1092
  • 4/3
  • Tilt-swivel screen
  • Fast startup
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