• 0.98 inch 285.7mm2
  • 4.6 megapixels
  • 28.00mm (35mm eq.)
  • APS-C 369.7mm2
  • 14.6 megapixels
  • ISO 100 - 3200

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Differences

Sigma DP1 advantages over Samsung GX-20

  • Less expensive
    $999 vs $1400 (MSRP)
    Save money for lenses or accessories
  • Bigger pixels
    ~ 7.84 vs 5.07 microns
    Better low-light and dynamic range (all else equal)
  • Thinner
    50 mm vs 70 mm
    Thinner
  • Lighter weight
    278g vs 714g
    Lighter weight

Samsung GX-20 advantages over Sigma DP1

  • Larger sensor
    APS-C vs 0.98 inch
    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
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • More pixels
    14.6 vs 4.6 megapixels
    Higher resolution photos
  • Longer exposure
    30 vs 15 sec
    Long exposures for night shots
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster shutter
    1/4000 vs 1/2000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    6400 vs 800 ISO
    Higher extended ISO can give more low-light flexibility

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
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities

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
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • HDMI out
    Neither provide
    Use HDMI output to monitor or review video
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • 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

Sigma DP1
Pentax K20D
  • $999
  • 0.98 inch
  • Bigger pixels
  • Thinner
  • $800
  • APS-C
  • Larger sensor
  • Less expensive
Samsung GX-20
Pentax K20D
  • $1400
  • APS-C
  • Higher effective ISO
  • $800
  • APS-C
  • Less expensive

Compared to Sony DSLR-A350

Sigma DP1
Sony DSLR-A350
  • $999
  • 0.98 inch
  • Bigger pixels
  • Thinner
  • $900
  • APS-C
  • Larger sensor
  • Eye-level viewfinder
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

Sigma DP1
Canon 50D
  • $999
  • 0.98 inch
  • Less expensive
  • Bigger pixels
  • $1000
  • APS-C
  • Larger sensor
  • Eye-level viewfinder
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

Sigma DP1
Sony DSLR-A380
  • $999
  • 0.98 inch
  • Bigger pixels
  • Thinner
  • $849
  • APS-C
  • Larger sensor
  • Less expensive
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

Sigma DP1
Pentax K-7
  • $999
  • 0.98 inch
  • Less expensive
  • Bigger pixels
  • $1300
  • APS-C
  • Larger sensor
  • Eye-level viewfinder
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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