• APS-C 369.7mm2
  • 14.6 megapixels
  • ISO 100 - 3200
  • APS-C 369.7mm2
  • 16.2 megapixels
  • ISO 100 - 12,800

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Differences

Samsung GX-20 advantages over Sony A55

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More cross-type AF points
    9 vs 3
    Cross-type AF points improve autofocus performance

Sony A55 advantages over Samsung GX-20

  • Less expensive
    $850 vs $1400 (MSRP)
    Save money for lenses or accessories
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Higher effective ISO
    818 vs 714 iso
    Take photos in low light with less noise
  • More dynamic range
    12.4 vs 11.2 evs
    Retain detail in highlight and shadows
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • More dots on screen
    922k vs 230k dots
    Can mean greater resolution or a brighter screen
  • More AF points
    15 vs 11
    More AF points improve autofocus
  • Higher extended ISO
    25600 vs 6400 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
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • 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
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • 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

Samsung GX-20
Pentax K20D
  • $1400
  • APS-C
  • Higher effective ISO
  • $800
  • APS-C
  • Less expensive
Sony A55
Pentax K20D
  • $734
  • APS-C
  • In-camera panoramas
  • Tiltable Screen
  • $800
  • APS-C
  • Lens selection
  • Fast startup

Compared to Canon 50D

Samsung GX-20
Canon 50D
  • $1400
  • APS-C
  • In-Camera Image Stabilization
  • $1000
  • APS-C
  • HDMI out
  • More dots on screen
Sony A55
Canon 50D
  • $734
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
  • $1000
  • APS-C
  • Lens selection
  • Fast startup

Compared to Pentax K-7

Samsung GX-20
Pentax K-7
  • $1400
  • APS-C
  • Higher effective ISO
  • $1300
  • APS-C
  • HDMI out
  • More dots on screen
Sony A55
Pentax K-7
  • $734
  • APS-C
  • Less expensive
  • In-camera panoramas
  • $1300
  • APS-C
  • Lens selection
  • Fast startup

Compared to Canon T2i

Samsung GX-20
Canon T2i
  • $1400
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $692
  • APS-C
  • Less expensive
  • External Mic Jack
Sony A55
Canon T2i
  • $734
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $692
  • APS-C
  • Lens selection
  • Fast startup

Compared to Sony A33

Samsung GX-20
Sony A33
  • $1400
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $540
  • APS-C
  • Less expensive
  • In-camera panoramas
Sony A55
Sony A33
  • $734
  • APS-C
  • Higher effective ISO
  • Built-in GPS
  • $540
  • APS-C
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