• APS-C 368.2mm2
  • 14.6 megapixels
  • ISO 100 - 3200
  • APS-C 369.7mm2
  • 16.1 megapixels
  • ISO 100 - 16,000

Buy From

Differences

Pentax K20D advantages over Sony A57

  • 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
  • Bigger JPEG buffer
    38 vs 25 shots
    Take more JPEG shots before waiting (burst mode)

Sony A57 advantages over Pentax K20D

  • 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
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Higher effective ISO
    785 vs 639 iso
    Take photos in low light with less noise
  • More dynamic range
    13.0 vs 11.1 evs
    Retain detail in highlight and shadows
  • Newer
    8 years vs 12 years old
    Newer cameras often support more advanced features
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More dots on screen
    922k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More viewfinder magnification
    0.69x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • More AF points
    15 vs 11
    More AF points improve autofocus
  • Faster JPEG shooting
    10.0 fps vs 2.8 fps
    Faster JPEG shooting (burst mode)
  • 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

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • 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
  • 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

Buy From

Your purchases support this site

Your purchases support this site

Review Excerpt

  • We haven’t finished our review of the Sony A57, but we have extensive sample photos and a hands-on report.

The Competition

Compared to Samsung GX-20

Pentax K20D
Samsung GX-20
  • $800
  • APS-C
  • Less expensive
  • $1400
  • APS-C
  • Higher effective ISO
Sony A57
Samsung GX-20
  • $800
  • APS-C
  • Less expensive
  • Focus peaking
  • $1400
  • APS-C
  • Lens selection
  • Top deck display

Compared to Sony DSLR-A380

Pentax K20D
Sony DSLR-A380
  • $800
  • APS-C
  • Lens selection
  • Fast startup
  • $849
  • APS-C
  • Tiltable Screen
  • HDMI out
Sony A57
Sony DSLR-A380
  • $800
  • APS-C
  • Focus peaking
  • In-camera panoramas
  • $849
  • APS-C
  • Bigger JPEG buffer

Compared to Pentax K-7

Pentax K20D
Pentax K-7
  • $800
  • APS-C
  • Less expensive
  • Fast startup
  • $1300
  • APS-C
  • Longer stills battery life
  • HDMI out
Sony A57
Pentax K-7
  • $800
  • APS-C
  • Less expensive
  • Focus peaking
  • $1300
  • APS-C
  • Lens selection
  • Longer stills battery life

Compared to Nikon D5100

Pentax K20D
Nikon D5100
  • $800
  • APS-C
  • In-Camera Image Stabilization
  • Top deck display
  • $499
  • APS-C
  • Tilt-swivel screen
  • Higher effective ISO
Sony A57
Nikon D5100
  • $800
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $499
  • APS-C
  • Lens selection
  • Tilt-swivel screen

Compared to Pentax K-5 IIs

Pentax K20D
Pentax K-5 IIs
  • $800
  • APS-C
  • Fast startup
  • Has anti-aliasing filter
  • $497
  • APS-C
  • Higher effective ISO
  • More dynamic range
Sony A57
Pentax K-5 IIs
  • $800
  • APS-C
  • Focus peaking
  • In-camera panoramas
  • $497
  • APS-C
  • Lens selection
  • Higher effective ISO
Compare Other Cameras?