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Pentax 645Z vs Sony A99 II
  • Medium format 1,436.6mm2
  • 51.4 megapixels
  • ISO 100 - 204,800
  • 35mm 861.6mm2
  • 42.4 megapixels
  • ISO 100 - 25,600

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Differences

Pentax 645Z advantages over Sony A99 II

  • Larger sensor
    Medium format vs 35mm
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.31 vs 4.51 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    4,505 vs 2,317 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 650 vs 490 shots
    Capture more photos
  • More cross-type AF points
    25 vs 15
    Cross-type AF points improve autofocus performance
  • More pixels
    51.4 vs 42.4 megapixels
    Higher resolution photos
  • Higher extended ISO
    204800 vs 102400 ISO
    Higher extended ISO can give more low-light flexibility

Sony A99 II advantages over Pentax 645Z

  • Lens selection
    Good vs Limited
    Better lens selection gives you more options
  • Less expensive
    $3198 vs $4694
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • 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
  • Thinner
    76 mm vs 123 mm
    Thinner
  • Higher max flash sync
    1/250 vs 1/125 sec
    Reduce the effect of ambient light in flash shots
  • Lighter weight
    849g vs 1555g
    Lighter weight
  • More AF points
    79 vs 27
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Faster JPEG shooting
    10.5 fps vs 3.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    61 vs 12 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    11.1 fps vs 3.1 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    25 vs 10 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

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
  • 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 HDMI output 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
  • 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
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash

User reviews

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Buy the Pentax 645Z
Body Only
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Buy the Sony A99 II
Body Only
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Review Excerpt

  • Phenomenal resolution and detail; Great high ISO performance; Rugged, weather-sealed body; Huge, bright viewfinder; Fast autofocus works well in low light; Swift performance for a medium-format camera; Good battery life; Shoots Full HD video

  • Quite bulky compared to an APS-C or full-frame DSLR; Autofocus points clustered near center of frame; Most lenses aren't weather-sealed or optimized for digital; Prone to aliasing artifacts (but so are most high-end cameras these days); Attracts a lot of attention from passers-by

  • Read our Pentax 645Z Review

  • Superb image quality at low, moderate ISOs; Improved high ISO performance; Fast continuous shooting speeds; Very impressive hybrid autofocus; High-quality 4K UHD video; Rugged camera body.

  • Multi-selector joystick can be awkward to use; No EVF live view at fastest burst rate; Buffer clearing is slow with no UHS-II support; 4K UHD video isn't as full-featured as E-mount counterparts.

  • Read our Sony A99 II Review

The Competition

Compared to Pentax 645D

Pentax 645Z
Pentax 645D
  • $4845
  • Medium format
  • Focus peaking
  • Tiltable Screen
  • $3599
  • Medium format
  • Fast startup
  • Longer stills battery life

Compare Pentax 645Z vs Pentax 645D

Sony A99 II
Pentax 645D
  • $3198
  • 35mm
  • Tilt-swivel screen
  • Lens selection
  • $3599
  • Medium format
  • Larger sensor
  • Bigger pixels

Compare Sony A99 II vs Pentax 645D

Compared to Leica S (Typ 006)

Pentax 645Z
Leica S (Typ 006)
  • $4845
  • Medium format
  • Focus peaking
  • Tiltable Screen
  • $10535
  • Medium format
  • Thinner
  • More viewfinder magnification

Compare Pentax 645Z vs Leica S (Typ 006)

Sony A99 II
Leica S (Typ 006)
  • $3198
  • 35mm
  • Tilt-swivel screen
  • Lens selection
  • $10535
  • Medium format
  • Larger sensor
  • Bigger pixels

Compare Sony A99 II vs Leica S (Typ 006)

Compared to Leica S-E (Typ 006)

Pentax 645Z
Leica S-E (Typ 006)
  • $4845
  • Medium format
  • Focus peaking
  • Tiltable Screen
  • $16900
  • Medium format
  • Built-in GPS
  • Thinner

Compare Pentax 645Z vs Leica S-E (Typ 006)

Sony A99 II
Leica S-E (Typ 006)
  • $3198
  • 35mm
  • Lens selection
  • Focus peaking
  • $16900
  • Medium format
  • Larger sensor
  • Bigger pixels

Compare Sony A99 II vs Leica S-E (Typ 006)

Compared to Canon 5D Mark IV

Pentax 645Z
Canon 5D Mark IV
  • $4845
  • Medium format
  • Focus peaking
  • Larger sensor
  • $2499
  • 35mm
  • Lens selection
  • Less expensive

Compare Pentax 645Z vs Canon 5D Mark IV

Sony A99 II
Canon 5D Mark IV
  • $3198
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $2499
  • 35mm
  • Lens selection
  • Bigger pixels

Compare Sony A99 II vs Canon 5D Mark IV

Compared to Nikon D850

Pentax 645Z
Nikon D850
  • $4845
  • Medium format
  • Larger sensor
  • Bigger pixels
  • $2664
  • 35mm
  • Less expensive
  • Lens selection

Compare Pentax 645Z vs Nikon D850

Sony A99 II
Nikon D850
  • $3198
  • 35mm
  • Tilt-swivel screen
  • In-Camera Image Stabilization
  • $2664
  • 35mm
  • Lens selection
  • Less expensive

Compare Sony A99 II vs Nikon D850

Compare Other Cameras?