• 1/3 inch 17.3mm2
  • 10.1 megapixels
  • 29.00mm - 87.00mm (35mm eq.)
  • APS-C 364.3mm2
  • 19.6 megapixels
  • ISO 100 - 6400

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Differences

Nikon S31 advantages over Sigma sd Quattro

  • Waterproof
    Yes vs No
    Take photos underwater without destroying your camera!
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    41 mm vs 90 mm
    Thinner
  • Lighter weight
    185g vs 625g
    Lighter weight

Sigma sd Quattro advantages over Nikon S31

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    APS-C vs 1/3 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
    ~ 4.33 vs 1.32 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
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Manual focus
    Yes vs No
    AF is for the weak. Real photographers focus manually.
  • Newer
    8 years vs 11 years old
    Newer cameras often support more advanced features
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • More dots on screen
    1620k 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
    19.6 vs 10.1 megapixels
    Higher resolution photos
  • Longer exposure
    30 vs 4 sec
    Long exposures for night shots
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster shutter
    1/4000 vs 1/2000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    6400 vs 1600 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera

Common Weaknesses

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • 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

User reviews

Buy From

Review Excerpt

The Competition

Compared to Nikon S30

Nikon S31
Nikon S30
  • $89
  • 1/3 inch
  • Faster shutter
  • $120
  • 1/3 inch
  • Longer stills battery life
Sigma sd Quattro
Nikon S30
  • $699
  • APS-C
  • Focus peaking
  • Larger sensor
  • $120
  • 1/3 inch
  • Waterproof
  • Internal flash

Compared to Sony A3000

Nikon S31
Sony A3000
  • $89
  • 1/3 inch
  • Less expensive
  • Waterproof
  • $500
  • APS-C
  • Focus peaking
  • Larger sensor
Sigma sd Quattro
Sony A3000
  • $699
  • APS-C
  • On-sensor phase detect
  • HDMI out
  • $500
  • APS-C
  • Lens selection
  • In-camera panoramas

Compared to Nikon S33

Nikon S31
Nikon S33
  • $89
  • 1/3 inch
  • Bigger pixels
  • $129
  • 1/3.1 inch
  • HDMI out
  • Shoots 1080p video
Sigma sd Quattro
Nikon S33
  • $699
  • APS-C
  • Focus peaking
  • Larger sensor
  • $129
  • 1/3.1 inch
  • Less expensive
  • Waterproof

Compared to Nikon W100

Nikon S31
Nikon W100
  • $89
  • 1/3 inch
  • Bigger pixels
  • $157
  • 1/3.1 inch
  • Built-in Wi-Fi
  • Built-in Bluetooth
Sigma sd Quattro
Nikon W100
  • $699
  • APS-C
  • Focus peaking
  • Larger sensor
  • $157
  • 1/3.1 inch
  • Less expensive
  • Waterproof

Compared to Fujifilm X-H1

Nikon S31
Fujifilm X-H1
  • $89
  • 1/3 inch
  • Waterproof
  • Internal flash
  • $1000
  • APS-C
  • Focus peaking
  • Larger sensor
Sigma sd Quattro
Fujifilm X-H1
  • $699
  • APS-C
  • More dots on screen
  • $1000
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
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