• 35mm 864.0mm2
  • 22.3 megapixels
  • ISO 100 - 25,600
  • 1/2.3 inch 28.1mm2
  • 20.4 megapixels
  • 24.00mm - 1200.00mm (35mm eq.)

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Differences

Canon 5D Mark III advantages over Sony HX300

  • Larger sensor
    35mm vs 1/2.3 inch
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.25 vs 1.19 microns
    Better low-light and dynamic range (all else equal)
  • RAW file ability
    Yes vs No
    Gives you more flexibility to develop your photos later
  • Fast startup
    ~0.50 vs 2.4 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 950 vs 310 shots
    Capture more photos
  • Thinner
    76 mm vs 103 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Less shutter lag
    0.12 vs 0.38 sec
    Focus and take a photo quickly (wide angle)
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Bigger JPEG buffer
    63 vs 10 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Sony HX300 advantages over Canon 5D Mark III

  • Less expensive
    $398* 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
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Lighter weight
    656g vs 950g
    Lighter weight
  • Faster JPEG shooting
    10.0 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video

Common Weaknesses

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • 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
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Your purchases support this site

Buy the Canon 5D Mark III

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.

  • Super-versatile 50x optical zoom lens helps you capture everything from wide-angle cityscapes to zoomed in portraits from what feels like a mile away; Still quite light and portable considering the powerful lens; Comfortable and ergonomic design; Full HD video recording at up to 60p, with good quality.

  • Relatively small, 1/2.3-inch CMOS sensor delivers average image quality that degrades quickly at high sensitivities; Images not as sharp or as bright at full telephoto as we had hoped; Slow camera to use overall.

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
Sony HX300
Canon 6D
  • $413
  • 1/2.3 inch
  • Less expensive
  • Focus peaking
  • $999
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Canon 5D Mark IV

Canon 5D Mark III
Canon 5D Mark IV
  • $2824
  • 35mm
  • Bigger pixels
  • $3099
  • 35mm
  • Shoot 4K video
  • Touchscreen
Sony HX300
Canon 5D Mark IV
  • $413
  • 1/2.3 inch
  • Less expensive
  • Focus peaking
  • $3099
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Sony A850

Canon 5D Mark III
Sony A850
  • $2824
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization
Sony HX300
Sony A850
  • $413
  • 1/2.3 inch
  • Focus peaking
  • Tiltable Screen
  • $2219
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Sony A99

Canon 5D Mark III
Sony A99
  • $2824
  • 35mm
  • Lens selection
  • Fast startup
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
Sony HX300
Sony A99
  • $413
  • 1/2.3 inch
  • Less expensive
  • Internal flash
  • $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
Sony HX300
Nikon Df
  • $413
  • 1/2.3 inch
  • Less expensive
  • Focus peaking
  • $2747
  • 35mm
  • Larger sensor
  • Bigger pixels
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