• Medium format 1,452.0mm2
  • 40.0 megapixels
  • ISO 200 - 1000
  • Medium format 2,169.5mm2
  • 101.1 megapixels
  • ISO 50 - 12,800

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Differences

Pentax 645D advantages over Phase One XF 100MP

  • Less expensive
    $9996 vs $48990 (MSRP)
    Save money for lenses or accessories
  • Bigger pixels
    ~ 6.06 vs 4.63 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.70 vs 10.0 sec
    Faster startup lets you catch the moment
  • Thinner
    119 mm vs 160 mm
    Thinner
  • Lighter weight
    1480g vs 2196g
    Lighter weight
  • Less shutter lag
    0.16 vs 0.33 sec
    Focus and take a photo quickly (wide angle)
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Faster RAW shooting
    1.1 fps vs 0.6 fps
    Faster RAW shooting in burst mode

Phase One XF 100MP advantages over Pentax 645D

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    Medium format vs Medium format
    More sensor area. Bigger is (generally) better.
  • 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
  • Newer
    9 years vs 14 years old
    Newer cameras often support more advanced features
  • More pixels
    101.1 vs 40.0 megapixels
    Higher resolution photos
  • Longer exposure
    3600 vs 30 sec
    Long exposures for night shots
  • Bigger RAW buffer
    Unlimited vs 16 shots
    Larger buffer for RAW shots (burst mode)

Similarities

Common Strengths

  • 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
  • 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
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Buy the Pentax 645D
Pentax 645D
All 645D Deals

Your purchases support this site

Buy the Phase One XF 100MP

Review Excerpt

  • Very high-resolution 40-megapixel sensor; Plentiful controls with great placement; Excellent optical viewfinder; Dual SDHC card slots; Infrared remote sensors front and back.

  • High price tag; Aliasing artifacts; Produces ~70MB RAW files.

  • Read our Pentax 645D Review

The Competition

Compared to Leica S2

Pentax 645D
Leica S2
  • $3599
  • Medium format
  • Less expensive
  • More cross-type AF points
  • $22995
  • Medium format
  • Thinner
  • More viewfinder magnification

Compare Pentax 645D vs Leica S2

Phase One XF 100MP
Leica S2
  • $48990
  • Medium format
  • Focus peaking
  • Larger sensor
  • $22995
  • Medium format
  • Less expensive
  • Bigger pixels

Compare Phase One XF 100MP vs Leica S2

Compared to Leica S (Typ 006)

Pentax 645D
Leica S (Typ 006)
  • $3599
  • Medium format
  • Less expensive
  • Higher effective ISO
  • $10535
  • Medium format
  • Thinner
  • More viewfinder magnification

Compare Pentax 645D vs Leica S (Typ 006)

Phase One XF 100MP
Leica S (Typ 006)
  • $48990
  • Medium format
  • Focus peaking
  • Larger sensor
  • $10535
  • Medium format
  • Less expensive
  • Bigger pixels

Compare Phase One XF 100MP vs Leica S (Typ 006)

Compared to Pentax 645Z

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

Compare Pentax 645D vs Pentax 645Z

Phase One XF 100MP
Pentax 645Z
  • $48990
  • Medium format
  • Larger sensor
  • Touchscreen
  • $4845
  • Medium format
  • Tiltable Screen
  • Fast startup

Compare Phase One XF 100MP vs Pentax 645Z

Compared to Leica S (Typ 007)

Pentax 645D
Leica S (Typ 007)
  • $3599
  • Medium format
  • Less expensive
  • More cross-type AF points
  • $19995
  • Medium format
  • Focus peaking
  • Shoot 4K video

Compare Pentax 645D vs Leica S (Typ 007)

Phase One XF 100MP
Leica S (Typ 007)
  • $48990
  • Medium format
  • Larger sensor
  • Touchscreen
  • $19995
  • Medium format
  • Less expensive
  • Bigger pixels

Compare Phase One XF 100MP vs Leica S (Typ 007)

Compared to Leica S-E (Typ 006)

Pentax 645D
Leica S-E (Typ 006)
  • $3599
  • Medium format
  • Less expensive
  • More cross-type AF points
  • $16900
  • Medium format
  • Built-in GPS
  • Thinner

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

Phase One XF 100MP
Leica S-E (Typ 006)
  • $48990
  • Medium format
  • Focus peaking
  • Larger sensor
  • $16900
  • Medium format
  • Less expensive
  • Bigger pixels

Compare Phase One XF 100MP vs Leica S-E (Typ 006)

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