• APS-C 369.7mm2
  • 24.3 megapixels
  • ISO 100 - 16,000
  • APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200

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Differences

Sony A77 advantages over Pentax K-S2

  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 530 vs 410 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Higher-res screen
    307k vs 230k pixels
    More detail on the screen lets you judge focus and composition
  • More viewfinder magnification
    0.73x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    24.3 vs 20.1 megapixels
    Higher resolution photos
  • More AF points
    19 vs 11
    More AF points improve autofocus
  • Wider angle kit lens
    24 mm vs 27 mm
    Capture more of the scene with the included lens
  • Faster JPEG shooting
    11.6 fps vs 5.2 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.6 fps vs 5.2 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    14 vs 9 shots
    Larger buffer for RAW shots (burst mode)

Pentax K-S2 advantages over Sony A77

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Newer
    7 years vs 11 years old
    Newer cameras often support more advanced features
  • Lighter weight
    859g vs 1363g
    Lighter weight
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Bigger JPEG buffer
    28 vs 17 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    51200 vs 16000 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Tilt-swivel screen
    Both provide
    Tilt and swivel the screen for maximum shooting flexibility
  • 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
  • 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

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

User reviews

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Your purchases support this site

Buy the Sony A77

Your purchases support this site

Buy the Pentax K-S2

Review Excerpt

  • Very fast top frame rate; full-time phase-detect autofocus; Full 60p HD video; Excellent kit lens; Very good high-resolution sensor.

  • Heavy; EVF appears dim when used in bright light; AF tracking in Movie mode was unreliable in our testing.

  • Very compact for a weather-sealed DSLR; Good ergonomics and great viewfinder; Excellent image quality; Decent performance for its class; Articulated screen is great for difficult compositions; Offers features not found in other Pentax DSLRs

  • 18-50mm kit lens is fiddly and prone to jamming when retracted; Wi-Fi is slow and unintuitive; Slow startup; Limited movie mode; Poor battery life for a DSLR; Priced too close to its enthusiast-grade sibling

The Competition

Compared to Canon 60D

Sony A77
Canon 60D
  • $1296
  • APS-C
  • Focus peaking
  • Larger sensor
  • $899
  • APS-C
  • Lens selection
  • Fast startup
Pentax K-S2
Canon 60D
  • $499
  • APS-C
  • Less expensive
  • Focus peaking
  • $899
  • APS-C
  • Fast startup
  • Longer stills battery life

Compared to Nikon D7100

Sony A77
Nikon D7100
  • $1296
  • APS-C
  • Focus peaking
  • Tilt-swivel screen
  • $810
  • APS-C
  • Lens selection
  • Fast startup
Pentax K-S2
Nikon D7100
  • $499
  • APS-C
  • Focus peaking
  • Less expensive
  • $810
  • APS-C
  • Fast startup
  • Longer stills battery life

Compared to Pentax K-500

Sony A77
Pentax K-500
  • $1296
  • APS-C
  • Tilt-swivel screen
  • In-camera panoramas
  • $597
  • APS-C
  • Lens selection
  • Less expensive
Pentax K-S2
Pentax K-500
  • $499
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
  • $597
  • APS-C
  • Longer stills battery life
  • Higher-res screen

Compared to Canon 70D

Sony A77
Canon 70D
  • $1296
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $999
  • APS-C
  • Lens selection
  • Touchscreen
Pentax K-S2
Canon 70D
  • $499
  • APS-C
  • Less expensive
  • Focus peaking
  • $999
  • APS-C
  • Touchscreen
  • Fast startup

Compared to Pentax K-S1

Sony A77
Pentax K-S1
  • $1296
  • APS-C
  • Tilt-swivel screen
  • In-camera panoramas
  • $502
  • APS-C
  • Lens selection
  • Less expensive
Pentax K-S2
Pentax K-S1
  • $499
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
  • $502
  • APS-C
  • Higher-res screen
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