• 35mm 864.0mm2
  • 21.1 megapixels
  • ISO 100 - 6400
  • 1/2.3 inch 28.1mm2
  • 14.1 megapixels
  • 26.00mm - 130.00mm (35mm eq.)

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Differences

Canon 5D Mark II advantages over Nikon S3100

  • Larger sensor
    35mm 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
    ~ 6.41 vs 1.43 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 850 vs 220 shots
    Capture more photos
  • 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
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • More dots on screen
    920k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    21.1 vs 14.1 megapixels
    Higher resolution photos
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Higher extended ISO
    25600 vs 3200 ISO
    Higher extended ISO can give more low-light flexibility

Nikon S3100 advantages over Canon 5D Mark II

  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    18 mm vs 75 mm
    Thinner

Similarities

Common Strengths

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

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
  • 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
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Review Excerpt

The Competition

Compared to Sony A900

Canon 5D Mark II
Sony A900
  • $2699
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $3000
  • 35mm
  • In-Camera Image Stabilization
  • More pixels
Nikon S3100
Sony A900
  • $140
  • 1/2.3 inch
  • Less expensive
  • Internal flash
  • $3000
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Nikon D3X

Canon 5D Mark II
Nikon D3X
  • $2699
  • 35mm
  • Less expensive
  • Shoots 1080p video
  • $6999
  • 35mm
  • Fast startup
  • More dynamic range
Nikon S3100
Nikon D3X
  • $140
  • 1/2.3 inch
  • Internal flash
  • Thinner
  • $6999
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A850

Canon 5D Mark II
Sony A850
  • $2699
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization
  • More pixels
Nikon S3100
Sony A850
  • $140
  • 1/2.3 inch
  • Less expensive
  • Internal flash
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Nikon S4100

Canon 5D Mark II
Nikon S4100
  • $2699
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $180
  • 1/2.3 inch
  • Internal flash
  • Thinner
Nikon S3100
Nikon S4100
  • $140
  • 1/2.3 inch
  • Less expensive
  • $180
  • 1/2.3 inch
  • More dots on screen

Compared to Sony W620

Canon 5D Mark II
Sony W620
  • $2699
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $143
  • 1/2.3 inch
  • Internal flash
  • Thinner
Nikon S3100
Sony W620
  • $140
  • 1/2.3 inch
  • $143
  • 1/2.3 inch
  • Less expensive
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