• APS-H 525.5mm2
  • 10.1 megapixels
  • ISO 100 - 3200
  • APS-C 369.7mm2
  • 14.6 megapixels
  • ISO 100 - 3200

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Differences

Canon 1D Mark III advantages over Samsung GX-20

  • Larger sensor
    APS-H vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 7.23 vs 5.07 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    1,078 vs 714 iso
    Take photos in low light with less noise
  • More cross-type AF points
    19 vs 9
    Cross-type AF points improve autofocus performance
  • Higher max flash sync
    1/300 vs 1/180 sec
    Reduce the effect of ambient light in flash shots
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    19 vs 11
    More AF points improve autofocus
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Samsung GX-20 advantages over Canon 1D Mark III

  • Less expensive
    $1400 vs $4500 (MSRP)
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Pentaprism viewfinder
    Pentaprism vs Pentamirror
    Much better viewfinder picture fidelity
  • Lighter weight
    714g vs 1155g
    Lighter weight
  • More pixels
    14.6 vs 10.1 megapixels
    Higher resolution photos

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
  • 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
  • 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
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • HDMI out
    Neither provide
    Use an external screen to monitor or review video
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

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Review Excerpt

The Competition

Compared to Pentax K20D

Canon 1D Mark III
Pentax K20D
  • $4500
  • APS-H
  • Larger sensor
  • Bigger pixels
  • $800
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Samsung GX-20
Pentax K20D
  • $1400
  • APS-C
  • Higher effective ISO
  • $800
  • APS-C
  • Less expensive

Compared to Sony DSLR-A350

Canon 1D Mark III
Sony DSLR-A350
  • $4500
  • APS-H
  • Lens selection
  • Larger sensor
  • $900
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Samsung GX-20
Sony DSLR-A350
  • $1400
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $900
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Canon 50D

Canon 1D Mark III
Canon 50D
  • $4500
  • APS-H
  • Larger sensor
  • Bigger pixels
  • $1000
  • APS-C
  • Less expensive
  • Internal flash
Samsung GX-20
Canon 50D
  • $1400
  • APS-C
  • In-Camera Image Stabilization
  • $1000
  • APS-C
  • HDMI out
  • More dots on screen

Compared to Sony DSLR-A380

Canon 1D Mark III
Sony DSLR-A380
  • $4500
  • APS-H
  • Lens selection
  • Larger sensor
  • $849
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Samsung GX-20
Sony DSLR-A380
  • $1400
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $849
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Pentax K-7

Canon 1D Mark III
Pentax K-7
  • $4500
  • APS-H
  • Larger sensor
  • Bigger pixels
  • $1300
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Samsung GX-20
Pentax K-7
  • $1400
  • APS-C
  • Higher effective ISO
  • $1300
  • APS-C
  • HDMI out
  • More dots on screen
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