• 35mm 860.4mm2
  • 16.2 megapixels
  • ISO 100 - 12,800
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 32,000

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Differences

Nikon D4 advantages over Sony A6400

  • 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.
  • Bigger pixels
    ~ 7.31 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.30 vs 1.8 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 2600 vs 410 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Higher max flash sync
    1/250 vs 1/160 sec
    Reduce the effect of ambient light in flash shots
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Bigger JPEG buffer
    Unlimited vs 87 shots
    Take more JPEG shots before waiting (burst mode)
  • Bigger RAW buffer
    Unlimited vs 42 shots
    Larger buffer for RAW shots (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    204800 vs 102400 ISO
    Higher extended ISO can give more low-light flexibility

Sony A6400 advantages over Nikon D4

  • Less expensive
    $978 vs $4500*
    Save money for lenses or accessories
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • 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
    59 mm vs 90 mm
    Thinner
  • Newer
    9 months vs 8 years old
    Newer cameras often support more advanced features
  • Less shutter lag
    0.12 vs 0.21 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    24.2 vs 16.2 megapixels
    Higher resolution photos
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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 Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • Built-in GPS
    Neither provide
    Geotag your photos

User reviews

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Buy the Sony A6400

Review Excerpt

The Competition

Compared to Canon 1DX

Nikon D4
Canon 1DX
  • $5248
  • 35mm
  • Less expensive
  • Fast startup
  • $5299
  • 35mm
  • More cross-type AF points
  • Less shutter lag
Sony A6400
Canon 1DX
  • $898
  • APS-C
  • Focus peaking
  • Less expensive
  • $5299
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon EOS-1D C

Nikon D4
Canon EOS-1D C
  • $5248
  • 35mm
  • $6989
  • 35mm
  • Shoot 4K video
  • More cross-type AF points
Sony A6400
Canon EOS-1D C
  • $898
  • APS-C
  • Focus peaking
  • Touchscreen
  • $6989
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Nikon D4S

Nikon D4
Nikon D4S
  • $5248
  • 35mm
  • Less expensive
  • Bigger JPEG buffer
  • $5999
  • 35mm
  • Fast startup
  • Higher extended ISO
Sony A6400
Nikon D4S
  • $898
  • APS-C
  • Less expensive
  • Focus peaking
  • $5999
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon EOS M50

Nikon D4
Canon EOS M50
  • $5248
  • 35mm
  • Lens selection
  • Larger sensor
  • $629
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Sony A6400
Canon EOS M50
  • $898
  • APS-C
  • Lens selection
  • Larger sensor
  • $629
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Sony A6100

Nikon D4
Sony A6100
  • $5248
  • 35mm
  • Lens selection
  • Larger sensor
  • $748
  • APS-C
  • Less expensive
  • Focus peaking
Sony A6400
Sony A6100
  • $898
  • APS-C
  • Higher extended ISO
  • $748
  • APS-C
  • Less expensive
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