• 35mm 861.6mm2
  • 36.4 megapixels
  • ISO 100 - 204,800
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 32,000

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Differences

Pentax K-1 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.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 4.88 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • 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 760 vs 410 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More pixels
    36.4 vs 24.2 megapixels
    Higher resolution photos
  • 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
  • Higher extended ISO
    204800 vs 102400 ISO
    Higher extended ISO can give more low-light flexibility

Sony A6400 advantages over Pentax K-1

  • 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
  • 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 85 mm
    Thinner
  • Newer
    8 months vs 4 years old
    Newer cameras often support more advanced features
  • Faster JPEG shooting
    11.0 fps vs 4.6 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.1 fps vs 4.6 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    42 vs 17 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

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
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • 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

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Buy the Sony A6400

Review Excerpt

  • Unlocks the full potential of full-frame Pentax lenses; Excellent image quality; Great ergonomics and build; Very compact for full-frame; Decent performance; Fast autofocus with great low-light capabilities; Very wide sensitivity range; Bright, accurate viewfinder; Articulated LCD; Stabilization, Wi-Fi and GPS in-camera

  • No built-in flash strobe; Quite heavy compared to APS-C flagships; Somewhat soft images and blown highlights by default in JPEG mode; Warm Auto white balance indoors; Slow startup and buffer clearing; Small top-deck status display; Weak viewfinder illumination; Below-average battery life for DSLR

The Competition

Compared to Nikon D810

Pentax K-1
Nikon D810
  • $1800
  • 35mm
  • Focus peaking
  • In-Camera Image Stabilization
  • $2397
  • 35mm
  • Fast startup
  • Longer stills battery life
Sony A6400
Nikon D810
  • $898
  • APS-C
  • Less expensive
  • Focus peaking
  • $2397
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon 5D Mark IV

Pentax K-1
Canon 5D Mark IV
  • $1800
  • 35mm
  • Focus peaking
  • In-Camera Image Stabilization
  • $2824
  • 35mm
  • Shoot 4K video
  • Touchscreen
Sony A6400
Canon 5D Mark IV
  • $898
  • APS-C
  • Focus peaking
  • Less expensive
  • $2824
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Pentax K-1 II

Pentax K-1
Pentax K-1 II
  • $1800
  • 35mm
  • $1797
  • 35mm
  • Newer
  • Higher extended ISO
Sony A6400
Pentax K-1 II
  • $898
  • APS-C
  • Less expensive
  • Shoot 4K video
  • $1797
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon EOS M50

Pentax K-1
Canon EOS M50
  • $1800
  • 35mm
  • Lens selection
  • Larger sensor
  • $629
  • APS-C
  • Tilt-swivel screen
  • Shoot 4K video
Sony A6400
Canon EOS M50
  • $898
  • APS-C
  • Lens selection
  • Larger sensor
  • $629
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Sony A6100

Pentax K-1
Sony A6100
  • $1800
  • 35mm
  • Lens selection
  • 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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