• 35mm 864.0mm2
  • 22.3 megapixels
  • ISO 100 - 25,600
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

Buy From

Differences

Canon 5D Mark III advantages over Olympus E-PL9

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Eye-level viewfinder
    Eye-level vs Rear display only
    You'll be able to frame photos even when the sun is out
  • Bigger pixels
    ~ 6.25 vs 3.75 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 950 vs 350 shots
    Capture more photos
  • 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
    22.3 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
  • Higher extended ISO
    102400 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Olympus E-PL9 advantages over Canon 5D Mark III

  • Less expensive
    $699 vs $3399
    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
  • 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
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    39 mm vs 76 mm
    Thinner
  • Newer
    6 months vs 7 years old
    Newer cameras often support more advanced features
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    8.6 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 63 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    8.6 fps vs 6.0 fps
    Faster RAW shooting in 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

  • 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
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • 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 Canon 5D Mark III

Your purchases support this site

Buy the Olympus E-PL9

Review Excerpt

  • Superb still and video image quality; Powerful, fast, and accurate AF system with loads of cross-type points, loads of configurability and great frame coverage; Rugged, weather-sealed body with great control layout and user-interface configurability.

  • Dynamic range is limited by noise in deep shadows; Somewhat heavy-handed noise suppression and sharpening at default settings. (Shooting RAW avoids both.); No AF illuminator.

The Competition

Compared to Canon 6D

Canon 5D Mark III
Canon 6D
  • $2824
  • 35mm
  • More cross-type AF points
  • Less shutter lag
  • $999
  • 35mm
  • Less expensive
  • Built-in Wi-Fi
Olympus E-PL9
Canon 6D
  • $599
  • 4/3
  • Focus peaking
  • Less expensive
  • $999
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Canon 5D Mark IV

Canon 5D Mark III
Canon 5D Mark IV
  • $2824
  • 35mm
  • Bigger pixels
  • $3099
  • 35mm
  • Shoot 4K video
  • Touchscreen
Olympus E-PL9
Canon 5D Mark IV
  • $599
  • 4/3
  • Focus peaking
  • Less expensive
  • $3099
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A850

Canon 5D Mark III
Sony A850
  • $2824
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization
Olympus E-PL9
Sony A850
  • $599
  • 4/3
  • Lens selection
  • Focus peaking
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A99

Canon 5D Mark III
Sony A99
  • $2824
  • 35mm
  • Lens selection
  • Fast startup
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
Olympus E-PL9
Sony A99
  • $599
  • 4/3
  • Less expensive
  • Lens selection
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Larger sensor

Compared to Nikon Df

Canon 5D Mark III
Nikon Df
  • $2824
  • 35mm
  • External Mic Jack
  • More cross-type AF points
  • $2747
  • 35mm
  • Bigger pixels
  • Higher effective ISO
Olympus E-PL9
Nikon Df
  • $599
  • 4/3
  • Less expensive
  • Focus peaking
  • $2747
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
Compare Other Cameras?