• 35mm 864.0mm2
  • 22.3 megapixels
  • ISO 100 - 25,600
  • 35mm 855.6mm2
  • 24.3 megapixels
  • 35.00mm (35mm eq.)

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Differences

Canon 5D Mark III advantages over Sony RX1R

  • Eye-level viewfinder
    Eye-level vs Rear display only
    You'll be able to frame photos even when the sun is out
  • Fast startup
    ~0.50 vs 1.7 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 950 vs 220 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Less shutter lag
    0.12 vs 0.27 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
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Faster JPEG shooting
    6.0 fps vs 5.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    63 vs 15 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    6.0 fps vs 5.2 fps
    Faster RAW shooting in burst mode
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Sony RX1R advantages over Canon 5D Mark III

  • Less expensive
    $2798* vs $3399
    Save money for lenses or accessories
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Higher effective ISO
    2,537 vs 2,293 iso
    Take photos in low light with less noise
  • More dynamic range
    13.6 vs 11.7 evs
    Retain detail in highlight and shadows
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Higher max flash sync
    1/4000 vs 1/200 sec
    Reduce the effect of ambient light in flash shots
  • Lighter weight
    482g vs 950g
    Lighter weight
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • 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 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
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • 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.

  • Significantly sharper, more detailed JPEG images than those from the RX1; JPEG processing appears to minimize moire and aliasing artifacts; Same price as the RX1; Full-frame, 24-megapixel compact camera with fast Carl Zeiss Sonnar 35mm f/2 T* lens; Blazing fast autofocus; Impressive image quality that rivals (and sometimes surpasses) full-frame DSLRs.

  • More prone to moire, aliasing and false color than the RX1; Only subtle improvement in sharpness in RAW files; Fixed-length lens limits shooting flexibility; Viewfinders (optical or electronic) only available as optional accessories; Extremely expensive for a compact camera.

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 RX1R
Canon 6D
  • $2798
  • 35mm
  • Focus peaking
  • In-camera panoramas
  • $999
  • 35mm
  • Less expensive
  • 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
Sony RX1R
Canon 5D Mark IV
  • $2798
  • 35mm
  • Less expensive
  • Focus peaking
  • $3099
  • 35mm
  • Eye-level viewfinder
  • Shoot 4K video

Compared to Sony A850

Canon 5D Mark III
Sony A850
  • $2824
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization
Sony RX1R
Sony A850
  • $2798
  • 35mm
  • Focus peaking
  • In-camera panoramas
  • $2219
  • 35mm
  • Eye-level viewfinder
  • In-Camera Image Stabilization

Compared to Sony A99

Canon 5D Mark III
Sony A99
  • $2824
  • 35mm
  • Lens selection
  • Fast startup
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
Sony RX1R
Sony A99
  • $2798
  • 35mm
  • Higher effective ISO
  • Internal flash
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen

Compared to Sony RX1

Canon 5D Mark III
Sony RX1
  • $2824
  • 35mm
  • Eye-level viewfinder
  • Fast startup
  • $2531
  • 35mm
  • Less expensive
  • Focus peaking
Sony RX1R
Sony RX1
  • $2798
  • 35mm
  • Lacks anti-aliasing filter
  • $2531
  • 35mm
  • Less expensive
  • Has anti-aliasing filter
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