• APS-C 369.7mm2
  • 16.2 megapixels
  • ISO 100 - 12,800
  • 1/2.3 inch 28.1mm2
  • 16.0 megapixels
  • 25.00mm - 750.00mm (35mm eq.)

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Differences

Sony A55 advantages over Nikon S9900

  • Larger sensor
    APS-C vs 1/2.3 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
  • Bigger pixels
    ~ 4.82 vs 1.34 microns
    Better low-light and dynamic range (all else equal)
  • RAW file ability
    Yes vs No
    Gives you more flexibility to develop your photos later
  • Manual focus
    Yes vs No
    AF is for the weak. Real photographers focus manually.
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Longer exposure
    30 vs 8 sec
    Long exposures for night shots
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster JPEG shooting
    9.0 fps vs 7.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    32 vs 5 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    25600 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

Nikon S9900 advantages over Sony A55

  • Less expensive
    $350 vs $850 (MSRP)
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Thinner
    39 mm vs 84 mm
    Thinner
  • Newer
    9 years vs 14 years old
    Newer cameras often support more advanced features
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • In-camera panoramas
    Both provide
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    Both provide
    Geotag your photos
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video

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 Bluetooth
    Neither provide
    Always-on wireless connectivity
  • 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
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

User reviews

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Buy the Nikon S9900

Review Excerpt

The Competition

Compared to Canon T2i

Sony A55
Canon T2i
  • $734
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $692
  • APS-C
  • Lens selection
  • Fast startup
Nikon S9900
Canon T2i
  • $280
  • 1/2.3 inch
  • Less expensive
  • Tilt-swivel screen
  • $692
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A33

Sony A55
Sony A33
  • $734
  • APS-C
  • Higher effective ISO
  • Built-in GPS
  • $540
  • APS-C
Nikon S9900
Sony A33
  • $280
  • 1/2.3 inch
  • Less expensive
  • Tilt-swivel screen
  • $540
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A35

Sony A55
Sony A35
  • $734
  • APS-C
  • Tiltable Screen
  • Built-in GPS
  • $567
  • APS-C
  • Less expensive
  • Longer stills battery life
Nikon S9900
Sony A35
  • $280
  • 1/2.3 inch
  • Less expensive
  • Tilt-swivel screen
  • $567
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony HX50V

Sony A55
Sony HX50V
  • $734
  • APS-C
  • Larger sensor
  • Eye-level viewfinder
  • $368
  • 1/2.3 inch
  • Less expensive
  • Built-in Wi-Fi
Nikon S9900
Sony HX50V
  • $280
  • 1/2.3 inch
  • Less expensive
  • Tilt-swivel screen
  • $368
  • 1/2.3 inch
  • Longer stills battery life
  • Manual focus

Compared to Sony HX80

Sony A55
Sony HX80
  • $734
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $368
  • 1/2.3 inch
  • Built-in Wi-Fi
  • Thinner
Nikon S9900
Sony HX80
  • $280
  • 1/2.3 inch
  • Tilt-swivel screen
  • Built-in GPS
  • $368
  • 1/2.3 inch
  • Eye-level viewfinder
  • Longer stills battery life
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