• APS-C 366.6mm2
  • 24.1 megapixels
  • ISO 100 - 6400
  • 4/3 226.2mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Nikon D7100 advantages over Olympus E-M10 III

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Fast startup
    ~0.30 vs 1.0 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 950 vs 330 shots
    Capture more photos
  • More telephoto lens reach
    158 mm vs 84 mm
    Capture objects farther away with the kit lens
  • 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 pixels
    24.1 vs 16.1 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video

Olympus E-M10 III advantages over Nikon D7100

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Less expensive
    $799 vs $1197
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Thinner
    49 mm vs 76 mm
    Thinner
  • Newer
    5 years vs 9 years old
    Newer cameras often support more advanced features
  • Lighter weight
    503g vs 1222g
    Lighter weight
  • Less shutter lag
    0.14 vs 0.25 sec
    Focus and take a photo quickly (wide angle)
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    8.6 fps vs 5.8 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 12 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    8.6 fps vs 5.3 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    33 vs 5 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

Similarities

Common Strengths

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

  • 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
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • 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

User reviews

Buy From

Your purchases support this site

Buy the Nikon D7100

Your purchases support this site

Buy the Olympus E-M10 III

Review Excerpt

  • Solid, ergonomic body design; Stunning, highly detailed photos, thanks to 24.1MP sensor upgrade and removal of optical low-pass filter; Cool 1.3x crop mode extends reach to nearly 2x the full-frame equivalent; Records Full 1080p HD video at up to 30fps with full-time AF; Many pro-level features packed into a consumer-friendly body at reasonable price.

  • Shallow buffer that hampers continuous burst shooting; AF slightly slower than average for its class; No real-time aperture control while in Movie mode (among other quirks); More noticeable moire patterns and aliasing artifacts (but only found when shooting fabrics with strong, distinct patterns).

  • 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 70D

Nikon D7100
Canon 70D
  • $810
  • APS-C
  • Fast startup
  • Higher effective ISO
  • $999
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Olympus E-M10 III
Canon 70D
  • $549
  • 4/3
  • Less expensive
  • Focus peaking
  • $999
  • APS-C
  • Tilt-swivel screen
  • Larger sensor

Compared to Pentax K-3

Nikon D7100
Pentax K-3
  • $810
  • APS-C
  • Fast startup
  • Longer stills battery life
  • $699
  • APS-C
  • Focus peaking
  • Less expensive
Olympus E-M10 III
Pentax K-3
  • $549
  • 4/3
  • Less expensive
  • Shoot 4K video
  • $699
  • APS-C
  • Larger sensor
  • Longer stills battery life

Compared to Sony A77 II

Nikon D7100
Sony A77 II
  • $810
  • APS-C
  • Lens selection
  • Less expensive
  • $1198
  • APS-C
  • Tilt-swivel screen
  • Focus peaking
Olympus E-M10 III
Sony A77 II
  • $549
  • 4/3
  • Lens selection
  • Less expensive
  • $1198
  • APS-C
  • Larger sensor
  • Tilt-swivel screen

Compared to Olympus E-M10 II

Nikon D7100
Olympus E-M10 II
  • $810
  • APS-C
  • Larger sensor
  • Fast startup
  • $349
  • 4/3
  • Focus peaking
  • Less expensive
Olympus E-M10 III
Olympus E-M10 II
  • $549
  • 4/3
  • Shoot 4K video
  • Newer
  • $349
  • 4/3
  • Less expensive

Compared to Panasonic GX85

Nikon D7100
Panasonic GX85
  • $810
  • APS-C
  • Larger sensor
  • Fast startup
  • $598
  • 4/3
  • Less expensive
  • Focus peaking
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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