• APS-C 366.6mm2
  • 24.1 megapixels
  • ISO 100 - 6400
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

Buy From

Differences

Nikon D7100 advantages over Olympus E-M1

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Fast startup
    ~0.30 vs 0.8 sec
    Faster startup lets you catch the moment
  • Higher effective ISO
    1,256 vs 757 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 950 vs 350 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • 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 pixels
    24.1 vs 16.1 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • 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-M1 advantages over Nikon D7100

  • 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
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Less shutter lag
    0.14 vs 0.25 sec
    Focus and take a photo quickly (wide angle)
  • More viewfinder magnification
    0.74x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    9.9 fps vs 5.8 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    50 vs 12 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    9.9 fps vs 5.3 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    50 vs 5 shots
    Larger buffer for RAW shots (burst mode)
  • 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
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

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).

  • Exceptional rugged, weather-proof, professional build; Lightning fast contrast-detect AF, and phase-detect AF that makes Four Thirds lenses far more responsive; Tons of useful physical controls with immense customizability; Arguably the best image quality of any Micro Four Thirds camera we've tested to date; Large, sharp, high-resolution electronic viewfinder; Advanced Wi-Fi capabilities, including remote control shooting in PASM exposure modes.

  • Bigger and heavier than many other compact system cameras; Most expensive Micro Four Thirds camera on the market to date; Menu system and customization options have a steep learning curve; No optical low-pass filter means greater risk of moire; No built-in flash.

The Competition

Compared to Olympus E-M5

Nikon D7100
Olympus E-M5
  • $795
  • APS-C
  • Larger sensor
  • Fast startup
  • $799
  • 4/3
  • In-Camera Image Stabilization
  • Touchscreen
Olympus E-M1
Olympus E-M5
  • $1099
  • 4/3
  • Focus peaking
  • Fast startup
  • $799
  • 4/3
  • Thinner
  • Has anti-aliasing filter

Compared to Canon 70D

Nikon D7100
Canon 70D
  • $795
  • APS-C
  • Fast startup
  • Higher effective ISO
  • $739
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Olympus E-M1
Canon 70D
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $739
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Panasonic GH3

Nikon D7100
Panasonic GH3
  • $795
  • APS-C
  • Larger sensor
  • Fast startup
  • $848
  • 4/3
  • Less expensive
  • Tilt-swivel screen
Olympus E-M1
Panasonic GH3
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $848
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compared to Pentax K-3

Nikon D7100
Pentax K-3
  • $795
  • APS-C
  • Fast startup
  • Longer stills battery life
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
Olympus E-M1
Pentax K-3
  • $1099
  • 4/3
  • Touchscreen
  • Tiltable Screen
  • $699
  • APS-C
  • Larger sensor
  • Higher effective ISO

Compared to Nikon D5300

Nikon D7100
Nikon D5300
  • $795
  • APS-C
  • Fast startup
  • Longer stills battery life
  • $445
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Olympus E-M1
Nikon D5300
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $445
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Compare Other Cameras?