• 35mm 860.4mm2
  • 12.1 megapixels
  • ISO 200 - 12,800
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Nikon D3S advantages over Olympus E-M10

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 8.46 vs 3.75 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.30 vs 1.3 sec
    Faster startup lets you catch the moment
  • Higher effective ISO
    3,253 vs 884 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 4200 vs 320 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More viewfinder magnification
    0.70x vs 0.58x
    Get a bigger view of the scene through the eye-level viewfinder
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Faster JPEG shooting
    9.0 fps vs 8.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    90 vs 19 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    9.1 fps vs 8.1 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    41 vs 15 shots
    Larger buffer for RAW shots (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-M10 advantages over Nikon D3S

  • Less expensive
    $800 vs $5200 (MSRP)
    Save money for lenses or accessories
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    45 mm vs 87 mm
    Thinner
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    16.1 vs 12.1 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

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Buy the Olympus E-M10

Review Excerpt

  • 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 Nikon D3X

Nikon D3S
Nikon D3X
  • $5200
  • 35mm
  • Less expensive
  • Bigger pixels
  • $2500
  • 35mm
  • More dynamic range
  • External Mic Jack
Olympus E-M10
Nikon D3X
  • $399
  • 4/3
  • Focus peaking
  • Less expensive
  • $2500
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Canon 1DX

Nikon D3S
Canon 1DX
  • $5200
  • 35mm
  • Less expensive
  • Bigger pixels
  • $5299
  • 35mm
  • External Mic Jack
  • Shoots 1080p video
Olympus E-M10
Canon 1DX
  • $399
  • 4/3
  • Less expensive
  • Focus peaking
  • $5299
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Nikon D4

Nikon D3S
Nikon D4
  • $5200
  • 35mm
  • Bigger pixels
  • Longer stills battery life
  • $4500
  • 35mm
  • External Mic Jack
  • Shoots 1080p video
Olympus E-M10
Nikon D4
  • $399
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $4500
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Panasonic GX7

Nikon D3S
Panasonic GX7
  • $5200
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $648
  • 4/3
  • Less expensive
  • Focus peaking
Olympus E-M10
Panasonic GX7
  • $399
  • 4/3
  • Less expensive
  • Higher effective ISO
  • $648
  • 4/3
  • In-camera panoramas
  • Fast startup

Compared to Olympus E-M10 II

Nikon D3S
Olympus E-M10 II
  • $5200
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $349
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
Olympus E-M10
Olympus E-M10 II
  • $399
  • 4/3
  • $349
  • 4/3
  • Fast startup
  • Shoots 24p video
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