• APS-C 355.7mm2
  • 14.2 megapixels
  • ISO 100 - 3200
  • 35mm 864.0mm2
  • 61.0 megapixels
  • ISO 100 - 25,600

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Differences

Nikon D3100 advantages over Sigma fp L

  • Less expensive
    $700 vs $2499 (MSRP)
    Save money for lenses or accessories
  • Eye-level viewfinder
    Eye-level vs Rear display only
    You'll be able to frame photos even when the sun is out
  • Bigger pixels
    ~ 5.01 vs 3.78 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 550 vs 240 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Higher max flash sync
    1/200 vs 1/15 sec
    Reduce the effect of ambient light in flash shots
  • Bigger JPEG buffer
    100 vs 12 shots
    Take more JPEG shots before waiting (burst mode)

Sigma fp L advantages over Nikon D3100

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Thinner
    45 mm vs 74 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Newer
    4 years vs 14 years old
    Newer cameras often support more advanced features
  • More dots on screen
    2100k vs 230k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    61.0 vs 14.2 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Faster JPEG shooting
    10.0 fps vs 2.9 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • 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
  • 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
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

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Review Excerpt

The Competition

Compared to Sony DSLR-A380

Nikon D3100
Sony DSLR-A380
  • $700
  • APS-C
  • Lens selection
  • Less expensive
  • $849
  • APS-C
  • In-Camera Image Stabilization
  • Tiltable Screen

Compare Nikon D3100 vs Sony DSLR-A380

Sigma fp L
Sony DSLR-A380
  • $2499
  • 35mm
  • Focus peaking
  • Larger sensor
  • $849
  • APS-C
  • Less expensive
  • Eye-level viewfinder

Compare Sigma fp L vs Sony DSLR-A380

Compared to Sony A33

Nikon D3100
Sony A33
  • $700
  • APS-C
  • Lens selection
  • Fast startup
  • $540
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas

Compare Nikon D3100 vs Sony A33

Sigma fp L
Sony A33
  • $2499
  • 35mm
  • Focus peaking
  • Larger sensor
  • $540
  • APS-C
  • Less expensive
  • Eye-level viewfinder

Compare Sigma fp L vs Sony A33

Compared to Pentax K-r

Nikon D3100
Pentax K-r
  • $700
  • APS-C
  • Less expensive
  • Higher effective ISO
  • $850
  • APS-C
  • In-Camera Image Stabilization
  • Fast startup

Compare Nikon D3100 vs Pentax K-r

Sigma fp L
Pentax K-r
  • $2499
  • 35mm
  • Focus peaking
  • Larger sensor
  • $850
  • APS-C
  • Less expensive
  • Eye-level viewfinder

Compare Sigma fp L vs Pentax K-r

Compared to Sigma fp

Nikon D3100
Sigma fp
  • $700
  • APS-C
  • Eye-level viewfinder
  • Internal flash
  • $1566
  • 35mm
  • Focus peaking
  • Larger sensor

Compare Nikon D3100 vs Sigma fp

Sigma fp L
Sigma fp
  • $2499
  • 35mm
  • Newer
  • More pixels
  • $1566
  • 35mm
  • Bigger pixels
  • Higher max flash sync

Compare Sigma fp L vs Sigma fp

Compared to Sony A7C

Nikon D3100
Sony A7C
  • $700
  • APS-C
  • Lens selection
  • More telephoto lens reach
  • $1631
  • 35mm
  • Tilt-swivel screen
  • Focus peaking

Compare Nikon D3100 vs Sony A7C

Sigma fp L
Sony A7C
  • $2499
  • 35mm
  • Thinner
  • More dots on screen
  • $1631
  • 35mm
  • Tilt-swivel screen
  • Eye-level viewfinder

Compare Sigma fp L vs Sony A7C

Compare Other Cameras?