• APS-C 332.3mm2
  • 18.0 megapixels
  • ISO 100 - 6400
  • 35mm 864.0mm2
  • 22.3 megapixels
  • ISO 100 - 25,600

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Differences

Canon 7D advantages over Canon 5D Mark III

  • Less expensive
    $1549 vs $3399
    Save money for lenses or accessories
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Faster JPEG shooting
    8.0 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    8.0 fps vs 6.0 fps
    Faster RAW shooting in burst mode

Canon 5D Mark III advantages over Canon 7D

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.25 vs 4.30 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    2,293 vs 854 iso
    Take photos in low light with less noise
  • More cross-type AF points
    41 vs 19
    Cross-type AF points improve autofocus performance
  • More viewfinder magnification
    0.71x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    22.3 vs 18.0 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    61 vs 19
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Bigger JPEG buffer
    63 vs 22 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    102400 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Top deck display
    Both provide
    Check settings with a screen on top of the camera
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • Pentaprism viewfinder
    Both provide
    Much better viewfinder picture fidelity
  • 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

  • Focus peaking
    Neither provide
    Your camera will highlight what's in focus
  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Your purchases support this site

Buy the Canon 7D

Your purchases support this site

Buy the Canon 5D Mark III

Review Excerpt

  • Excellent 18-megapixel sensor with impressively low noise and superb detail; Very good high ISO performance, especially for 18-megapixel subframe sensor; Rugged construction with magnesium body and weather sealing; Fast autofocus and fast burst rate of 8 fps; Full HD (1920x1080) movies at 30/25/24p, 60/50p at 1280x720.

  • No dedicated AF-assist lamp (flash is used), and AF-assist adjustment is buried in the Flash Settings menu; Kit lens (28-135mm) isn't quite up to the resolving power of the 18-megapixel sensor, odd focal length for subframe DSLR; No continuous autofocus in Movie mode.

  • 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 7D
Canon 6D
  • $1399
  • APS-C
  • Less expensive
  • More telephoto lens reach
  • $999
  • 35mm
  • Larger sensor
  • Bigger pixels
Canon 5D Mark III
Canon 6D
  • $2774
  • 35mm
  • More cross-type AF points
  • Less shutter lag
  • $999
  • 35mm
  • Less expensive
  • Built-in Wi-Fi

Compared to Canon 7D Mark II

Canon 7D
Canon 7D Mark II
  • $1399
  • APS-C
  • Less expensive
  • Less shutter lag
  • $1229
  • APS-C
  • Higher effective ISO
  • Built-in GPS
Canon 5D Mark III
Canon 7D Mark II
  • $2774
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1229
  • APS-C
  • Less expensive
  • Built-in GPS

Compared to Canon 5D Mark IV

Canon 7D
Canon 5D Mark IV
  • $1399
  • APS-C
  • Less expensive
  • Internal flash
  • $3099
  • 35mm
  • Larger sensor
  • Bigger pixels
Canon 5D Mark III
Canon 5D Mark IV
  • $2774
  • 35mm
  • Bigger pixels
  • $3099
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compared to Sony A850

Canon 7D
Sony A850
  • $1399
  • APS-C
  • Lens selection
  • Internal flash
  • $2219
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
Canon 5D Mark III
Sony A850
  • $2774
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization

Compared to Canon 60D

Canon 7D
Canon 60D
  • $1399
  • APS-C
  • More cross-type AF points
  • Less shutter lag
  • $999
  • APS-C
  • Tilt-swivel screen
  • Longer stills battery life
Canon 5D Mark III
Canon 60D
  • $2774
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $999
  • APS-C
  • Less expensive
  • Tilt-swivel screen
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