• 1/2.33 inch 28.2mm2
  • 12.0 megapixels
  • 28.00mm - 140.00mm (35mm eq.)
  • 35mm 861.6mm2
  • 24.6 megapixels
  • ISO 200 - 3200

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Differences

Nikon S640 advantages over Sony A850

  • Less expensive
    $250 vs $2000 (MSRP)
    Save money for lenses or accessories
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    20 mm vs 81 mm
    Thinner
  • Lighter weight
    110g vs 850g
    Lighter weight

Sony A850 advantages over Nikon S640

  • Larger sensor
    35mm vs 1/2.33 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
    ~ 5.94 vs 1.53 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
  • Longer stills battery life
    More info 880 vs 270 shots
    Capture more photos
  • Manual focus
    Yes vs No
    AF is for the weak. Real photographers focus manually.
  • 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
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • More pixels
    24.6 vs 12.0 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures

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

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
  • 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
  • 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 Sony A900

Nikon S640
Sony A900
  • $250
  • 1/2.33 inch
  • Less expensive
  • Internal flash
  • $3000
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
Sony A850
Sony A900
  • $2219
  • 35mm
  • Less expensive
  • Bigger JPEG buffer
  • $3000
  • 35mm
  • Faster JPEG shooting

Compared to Nikon S570

Nikon S640
Nikon S570
  • $250
  • 1/2.33 inch
  • In-Camera Image Stabilization
  • Longer stills battery life
  • $180
  • 1/2.3 inch
  • Less expensive
Sony A850
Nikon S570
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $180
  • 1/2.3 inch
  • Less expensive
  • Internal flash

Compared to Nikon S5100

Nikon S640
Nikon S5100
  • $250
  • 1/2.33 inch
  • In-Camera Image Stabilization
  • Longer stills battery life
  • $149
  • 1/2.3 inch
  • Less expensive
Sony A850
Nikon S5100
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $149
  • 1/2.3 inch
  • Less expensive
  • Internal flash

Compared to Sony DSC-W530

Nikon S640
Sony DSC-W530
  • $250
  • 1/2.33 inch
  • In-Camera Image Stabilization
  • More telephoto lens reach
  • $150
  • 1/2.3 inch
  • Less expensive
  • More pixels
Sony A850
Sony DSC-W530
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $150
  • 1/2.3 inch
  • Less expensive
  • Internal flash

Compared to Canon 5D Mark III

Nikon S640
Canon 5D Mark III
  • $250
  • 1/2.33 inch
  • In-Camera Image Stabilization
  • Internal flash
  • $2079
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
Sony A850
Canon 5D Mark III
  • $2219
  • 35mm
  • In-Camera Image Stabilization
  • $2079
  • 35mm
  • Lens selection
  • Higher effective ISO
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