• APS-C 355.7mm2
  • 14.2 megapixels
  • ISO 100 - 3200
  • 1 inch 116.2mm2
  • 20.2 megapixels
  • 24.00mm - 100.00mm (35mm eq.)

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Differences

Nikon D3100 advantages over Canon G7X Mark III

  • Larger sensor
    APS-C vs 1 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
    ~ 5.01 vs 2.41 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.40 vs 1.5 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 550 vs 235 shots
    Capture more photos
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities

Canon G7X Mark III advantages over Nikon D3100

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Integrated ND filter
    Yes vs No
    Shoot in daylight with a large aperture or slow shutter
  • Thinner
    41 mm vs 74 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/2000 vs 1/200 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    5 years vs 14 years old
    Newer cameras often support more advanced features
  • More dots on screen
    1040k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Less shutter lag
    0.15 vs 0.28 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    20.2 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
    20.0 fps vs 2.9 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/25600 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    25600 vs 12800 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
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • 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
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • 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

User reviews

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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

Canon G7X Mark III
Sony DSLR-A380
  • $1038
  • 1 inch
  • Focus peaking
  • Shoot 4K video
  • $849
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compare Canon G7X Mark III 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

Canon G7X Mark III
Sony A33
  • $1038
  • 1 inch
  • Focus peaking
  • Shoot 4K video
  • $540
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compare Canon G7X Mark III 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

Canon G7X Mark III
Pentax K-r
  • $1038
  • 1 inch
  • Focus peaking
  • Shoot 4K video
  • $850
  • APS-C
  • Larger sensor
  • Eye-level viewfinder

Compare Canon G7X Mark III vs Pentax K-r

Compared to Sony RX100 VA

Nikon D3100
Sony RX100 VA
  • $700
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $998
  • 1 inch
  • Focus peaking
  • In-Camera Image Stabilization

Compare Nikon D3100 vs Sony RX100 VA

Canon G7X Mark III
Sony RX100 VA
  • $1038
  • 1 inch
  • Less expensive
  • Touchscreen
  • $998
  • 1 inch
  • Slower slow-motion
  • Eye-level viewfinder

Compare Canon G7X Mark III vs Sony RX100 VA

Compared to Canon G5X Mark II

Nikon D3100
Canon G5X Mark II
  • $700
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $899
  • 1 inch
  • Focus peaking
  • In-Camera Image Stabilization

Compare Nikon D3100 vs Canon G5X Mark II

Canon G7X Mark III
Canon G5X Mark II
  • $1038
  • 1 inch
  • Less expensive
  • External Mic Jack
  • $899
  • 1 inch
  • Eye-level viewfinder
  • More telephoto lens reach

Compare Canon G7X Mark III vs Canon G5X Mark II

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