• 35mm 864.0mm2
  • 21.1 megapixels
  • ISO 100 - 6400
  • APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600

Buy From

Differences

Canon 5D Mark II advantages over Sony A5100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Larger sensor
    35mm vs APS-C
    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 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.40 vs 2.0 sec
    Faster startup lets you catch the moment
  • Higher effective ISO
    1,815 vs 1,347 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 850 vs 400 shots
    Capture more photos
  • More telephoto lens reach
    105 mm vs 75 mm
    Capture objects farther away with the kit lens
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Sony A5100 advantages over Canon 5D Mark II

  • Less expensive
    $498 vs $2699
    Save money for lenses or accessories
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    35 mm vs 75 mm
    Thinner
  • Newer
    4 years vs 10 years old
    Newer cameras often support more advanced features
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Lighter weight
    399g vs 1588g
    Lighter weight
  • More pixels
    24.3 vs 21.1 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Faster JPEG shooting
    6.0 fps vs 3.9 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    6.0 fps vs 3.9 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    25 vs 11 shots
    Larger buffer for RAW shots (burst mode)

Similarities

Common Strengths

  • 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
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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

Your purchases support this site

Buy the Canon 5D Mark II

Your purchases support this site

Buy the Sony A5100

Review Excerpt

  • Very small and comfortable form factor; Very good image quality for its class; New dual video record function; Quick autofocus and good dynamic range.

  • Lacks an EVF and external mode dial; No hot shoe; JPEG processing at higher ISOs not as good as some competing mid-level models.

The Competition

Compared to Sony A900

Canon 5D Mark II
Sony A900
  • $2598
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $3000
  • 35mm
  • In-Camera Image Stabilization
  • More pixels
Sony A5100
Sony A900
  • $398
  • APS-C
  • Focus peaking
  • Touchscreen
  • $3000
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Nikon D3X

Canon 5D Mark II
Nikon D3X
  • $2598
  • 35mm
  • Less expensive
  • Shoots 1080p video
  • $6999
  • 35mm
  • Fast startup
  • More dynamic range
Sony A5100
Nikon D3X
  • $398
  • APS-C
  • Less expensive
  • Focus peaking
  • $6999
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Sony A850

Canon 5D Mark II
Sony A850
  • $2598
  • 35mm
  • Lens selection
  • Higher effective ISO
  • $2219
  • 35mm
  • In-Camera Image Stabilization
  • More pixels
Sony A5100
Sony A850
  • $398
  • APS-C
  • Focus peaking
  • Touchscreen
  • $2219
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Sony A5000

Canon 5D Mark II
Sony A5000
  • $2598
  • 35mm
  • Lens selection
  • Larger sensor
  • $498
  • APS-C
  • Less expensive
  • Focus peaking
Sony A5100
Sony A5000
  • $398
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $498
  • APS-C

Compared to Samsung NX3000

Canon 5D Mark II
Samsung NX3000
  • $2598
  • 35mm
  • Lens selection
  • Larger sensor
  • $442
  • APS-C
  • Less expensive
  • In-camera panoramas
Sony A5100
Samsung NX3000
  • $398
  • APS-C
  • Lens selection
  • Focus peaking
  • $442
  • APS-C
  • Hot shoe
  • Slow-motion videos
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