• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 32,000

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Differences

Sony A99 advantages over Sony A6400

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • 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
  • Bigger pixels
    ~ 5.97 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.70 vs 1.8 sec
    Faster startup lets you catch the moment
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 500 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
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Sony A6400 advantages over Sony A99

  • 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
  • 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 78 mm
    Thinner
  • Newer
    5 years vs 12 years old
    Newer cameras often support more advanced features
  • Faster JPEG shooting
    11.0 fps vs 5.9 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    87 vs 17 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    11.1 fps vs 5.9 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    42 vs 18 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    102400 vs 51200 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • In-camera panoramas
    Both provide
    Stitches multiple shots into a panoramic photo
  • 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

User reviews

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Buy the Sony A6400

Review Excerpt

The Competition

Compared to Nikon D800

Sony A99
Nikon D800
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Focus peaking
  • $1850
  • 35mm
  • Lens selection
  • Fast startup
Sony A6400
Nikon D800
  • $898
  • APS-C
  • Focus peaking
  • Shoot 4K video
  • $1850
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon 5D Mark III

Sony A99
Canon 5D Mark III
  • $1998
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $2139
  • 35mm
  • Lens selection
  • Fast startup
Sony A6400
Canon 5D Mark III
  • $898
  • APS-C
  • Less expensive
  • Focus peaking
  • $2139
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Nikon D800E

Sony A99
Nikon D800E
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
  • $2212
  • 35mm
  • Lens selection
  • Fast startup
Sony A6400
Nikon D800E
  • $898
  • APS-C
  • Focus peaking
  • Shoot 4K video
  • $2212
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Fujifilm X-T100

Sony A99
Fujifilm X-T100
  • $1998
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
  • $599
  • APS-C
  • Shoot 4K video
  • Touchscreen
Sony A6400
Fujifilm X-T100
  • $898
  • APS-C
  • Slower slow-motion
  • Fast startup
  • $599
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Sony A6100

Sony A99
Sony A6100
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
  • $748
  • APS-C
  • Shoot 4K video
  • Touchscreen
Sony A6400
Sony A6100
  • $898
  • APS-C
  • Higher extended ISO
  • $748
  • APS-C
  • Less expensive
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