• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • 35mm 861.6mm2
  • 36.4 megapixels
  • ISO 100 - 204,800

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Differences

Sony A99 advantages over Pentax K-1

  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Bigger pixels
    ~ 5.97 vs 4.88 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Fast startup
    ~0.70 vs 1.2 sec
    Faster startup lets you catch the moment
  • Faster JPEG shooting
    5.9 fps vs 4.6 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    5.9 fps vs 4.6 fps
    Faster RAW shooting in burst mode

Pentax K-1 advantages over Sony A99

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Higher effective ISO
    3,280 vs 1,555 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 760 vs 500 shots
    Capture more photos
  • More cross-type AF points
    25 vs 3
    Cross-type AF points improve autofocus performance
  • Newer
    20 months vs 5 years old
    Newer cameras often support more advanced features
  • More pixels
    36.4 vs 24.3 megapixels
    Higher resolution photos
  • More AF points
    33 vs 19
    More AF points improve autofocus
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Bigger JPEG buffer
    74 vs 17 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    204800 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 Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • Built-in GPS
    Both provide
    Geotag your photos
  • Top deck display
    Both provide
    Check settings with a screen on top of the camera
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • HDMI out
    Both provide
    Use an external screen to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Dual card slots
    Both provide
    Gives you more storage flexibility
  • Headphone jack
    Both provide
    Monitor audio recording while you shoot video
  • Bulb shutter
    Both provide
    Hold the shutter open manually for long exposures

Common Weaknesses

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

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 D800

Sony A99
Nikon D800
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Focus peaking
  • $1850
  • 35mm
  • Lens selection
  • Fast startup
Pentax K-1
Nikon D800
  • $1897
  • 35mm
  • Focus peaking
  • In-Camera Image Stabilization
  • $1850
  • 35mm
  • Fast startup
  • Internal flash

Compared to Canon 5D Mark III

Sony A99
Canon 5D Mark III
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
  • $2699
  • 35mm
  • Lens selection
  • Fast startup
Pentax K-1
Canon 5D Mark III
  • $1897
  • 35mm
  • Less expensive
  • Focus peaking
  • $2699
  • 35mm
  • Bigger pixels
  • Fast startup

Compared to Nikon D600

Sony A99
Nikon D600
  • $1998
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $1497
  • 35mm
  • Lens selection
  • Less expensive
Pentax K-1
Nikon D600
  • $1897
  • 35mm
  • Focus peaking
  • In-Camera Image Stabilization
  • $1497
  • 35mm
  • Less expensive
  • Bigger pixels

Compared to Canon 5D Mark IV

Sony A99
Canon 5D Mark IV
  • $1998
  • 35mm
  • Focus peaking
  • Less expensive
  • $3199
  • 35mm
  • Lens selection
  • Shoot 4K video
Pentax K-1
Canon 5D Mark IV
  • $1897
  • 35mm
  • Less expensive
  • Focus peaking
  • $3199
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compared to Sony A99 II

Sony A99
Sony A99 II
  • $1998
  • 35mm
  • Less expensive
  • Bigger pixels
  • $3198
  • 35mm
  • Shoot 4K video
  • Built-in Wi-Fi
Pentax K-1
Sony A99 II
  • $1897
  • 35mm
  • Lens selection
  • Less expensive
  • $3198
  • 35mm
  • Tilt-swivel screen
  • Shoot 4K video
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