• APS-C 337.5mm2
  • 20.2 megapixels
  • ISO 100 - 12,800
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Canon 70D advantages over Olympus E-M1

  • Less expensive
    $918 vs $1099*
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Higher effective ISO
    926 vs 757 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 920 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
    20.2 vs 16.1 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos

Olympus E-M1 advantages over Canon 70D

  • 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
  • More viewfinder magnification
    0.74x vs 0.59x
    Get a bigger view of the scene through the eye-level viewfinder
  • 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
    9.9 fps vs 6.7 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    9.9 fps vs 6.7 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    50 vs 14 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
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • On-sensor phase detect
    Both provide
    Usually improves live view and video AF performance
  • 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

  • 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
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • 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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Your purchases support this site

Buy the Canon 70D

Your purchases support this site

Buy the Olympus E-M1

Review Excerpt

  • Dual Pixel CMOS AF delivers full-time continuous autofocus (with phase detect at every pixel in framing area) for video and Live View still shooting; Full HD (1080p) video recording with pro-level features and quality; Improved resolution and good high ISO performance; Excellent Wi-Fi remote shooting with full exposure controls; 3-inch articulating LCD touchscreen.

  • Image quality only improved slightly over 60D; Dynamic range still lags behind competing models; May not feature enough upgrades to convince people to step up from 60D.

  • 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

Canon 70D
Olympus E-M5
  • $800
  • APS-C
  • Larger sensor
  • Tilt-swivel screen
  • $799
  • 4/3
  • In-Camera Image Stabilization
  • Thinner
Olympus E-M1
Olympus E-M5
  • $1099
  • 4/3
  • Focus peaking
  • Fast startup
  • $799
  • 4/3
  • Thinner
  • Has anti-aliasing filter

Compared to Nikon D7100

Canon 70D
Nikon D7100
  • $800
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
  • $795
  • APS-C
  • Fast startup
  • Higher effective ISO
Olympus E-M1
Nikon D7100
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $795
  • APS-C
  • Larger sensor
  • Fast startup

Compared to Panasonic GH3

Canon 70D
Panasonic GH3
  • $800
  • APS-C
  • Larger sensor
  • Higher effective ISO
  • $848
  • 4/3
  • More viewfinder magnification
  • Headphone jack
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

Canon 70D
Pentax K-3
  • $800
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
  • $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 Panasonic GH4

Canon 70D
Panasonic GH4
  • $800
  • APS-C
  • Larger sensor
  • Higher effective ISO
  • $798
  • 4/3
  • Focus peaking
  • Shoot 4K video
Olympus E-M1
Panasonic GH4
  • $1099
  • 4/3
  • In-Camera Image Stabilization
  • On-sensor phase detect
  • $798
  • 4/3
  • Less expensive
  • Tilt-swivel screen
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