• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 32,000

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Differences

Pentax K-3 II advantages over Sony A6400

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $830* vs $998
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Fast startup
    ~1.20 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 720 vs 410 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Sony A6400 advantages over Pentax K-3 II

  • 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
  • Newer
    12 months vs 5 years old
    Newer cameras often support more advanced features
  • More viewfinder magnification
    0.70x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • Faster JPEG shooting
    11.0 fps vs 8.1 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.1 fps vs 8.2 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    42 vs 22 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
  • 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

User reviews

Buy From

Your purchases support this site

Buy the Sony A6400

Review Excerpt

  • Top-notch image quality; Spectacular detail from Pixel Shift Resolution; Better performance than K-3; Geotag images with no accessories; Great ergonomics in a compact body; Clever on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots

  • No built-in flash strobe; No wireless flash support out of the box; AstroTracer function can be finicky; AE Lock button is poorly located; Below-average battery life for a prosumer DSLR; Requires a different battery grip accessory than its predecessors

The Competition

Compared to Canon T6i

Pentax K-3 II
Canon T6i
  • $830
  • APS-C
  • Focus peaking
  • Larger sensor
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Sony A6400
Canon T6i
  • $898
  • APS-C
  • Focus peaking
  • Larger sensor
  • $549
  • APS-C
  • Lens selection
  • Less expensive

Compared to Pentax KP

Pentax K-3 II
Pentax KP
  • $830
  • APS-C
  • Built-in GPS
  • Longer stills battery life
  • $746
  • APS-C
  • Tiltable Screen
  • Built-in Wi-Fi
Sony A6400
Pentax KP
  • $898
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $746
  • APS-C
  • Less expensive
  • Lens selection

Compared to Canon T7i

Pentax K-3 II
Canon T7i
  • $830
  • APS-C
  • Focus peaking
  • Larger sensor
  • $699
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Sony A6400
Canon T7i
  • $898
  • APS-C
  • Focus peaking
  • Larger sensor
  • $699
  • APS-C
  • Lens selection
  • Less expensive

Compared to Canon EOS M6 Mark II

Pentax K-3 II
Canon EOS M6 Mark II
  • $830
  • APS-C
  • Lens selection
  • Less expensive
  • $849
  • APS-C
  • Shoot 4K video
  • Touchscreen
Sony A6400
Canon EOS M6 Mark II
  • $898
  • APS-C
  • Lens selection
  • Eye-level viewfinder
  • $849
  • APS-C
  • Fast startup
  • More pixels

Compared to Sony A6100

Pentax K-3 II
Sony A6100
  • $830
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $598
  • APS-C
  • Less expensive
  • Shoot 4K video
Sony A6400
Sony A6100
  • $898
  • APS-C
  • Higher extended ISO
  • $598
  • APS-C
  • Less expensive
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