• Medium format 1,452.0mm2
  • 40.0 megapixels
  • ISO 200 - 1000
  • 35mm 861.6mm2
  • 42.4 megapixels
  • 35.00mm (35mm eq.)

Buy From

Differences

Pentax 645D advantages over Sony RX1R II

  • Larger sensor
    Medium format vs 35mm
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.06 vs 4.51 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.70 vs 1.5 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 800 vs 220 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Less shutter lag
    0.16 vs 0.26 sec
    Focus and take a photo quickly (wide angle)
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility

Sony RX1R II advantages over Pentax 645D

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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
  • Higher effective ISO
    3,204 vs 1,262 iso
    Take photos in low light with less noise
  • More dynamic range
    13.9 vs 12.6 evs
    Retain detail in highlight and shadows
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    72 mm vs 119 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/2000 vs 1/125 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    8 years vs 13 years old
    Newer cameras often support more advanced features
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Lighter weight
    507g vs 1480g
    Lighter weight
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Optional anti-aliasing filter
    Optional vs None
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    5.0 fps vs 1.1 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    5.0 fps vs 1.1 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    23 vs 16 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    102400 vs 1600 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • 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
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

User reviews

Buy From

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.

  • Excellent image quality; Extremely high resolution; Surprisingly good high ISO performance; Outstanding dynamic range; Handy variable low-pass filter; Fast phase-detect AF; Built-in EVF.

  • Fixed, single focal length lens; Poor battery life; No built-in flash; No touchscreen LCD; Slow buffer clearing; No 4K video; Expensive.

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
Sony RX1R II
Leica S2
  • $3298
  • 35mm
  • Focus peaking
  • In-camera panoramas
  • $22995
  • Medium format
  • Larger sensor
  • Bigger pixels

Compared to Sony RX1

Pentax 645D
Sony RX1
  • $3599
  • Medium format
  • Larger sensor
  • Eye-level viewfinder
  • $2398
  • 35mm
  • Focus peaking
  • In-camera panoramas
Sony RX1R II
Sony RX1
  • $3298
  • 35mm
  • Eye-level viewfinder
  • Tiltable Screen
  • $2398
  • 35mm
  • Less expensive
  • Bigger pixels

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
Sony RX1R II
Leica S (Typ 006)
  • $3298
  • 35mm
  • Focus peaking
  • In-camera panoramas
  • $10535
  • Medium format
  • Larger sensor
  • Bigger pixels

Compared to Sony RX1R

Pentax 645D
Sony RX1R
  • $3599
  • Medium format
  • Larger sensor
  • Eye-level viewfinder
  • $2398
  • 35mm
  • Focus peaking
  • In-camera panoramas
Sony RX1R II
Sony RX1R
  • $3298
  • 35mm
  • Eye-level viewfinder
  • Tiltable Screen
  • $2398
  • 35mm
  • Less expensive
  • Bigger pixels

Compared to Pentax 645Z

Pentax 645D
Pentax 645Z
  • $3599
  • Medium format
  • Fast startup
  • Longer stills battery life
  • $4845
  • Medium format
  • Focus peaking
  • Tiltable Screen
Sony RX1R II
Pentax 645Z
  • $3298
  • 35mm
  • Less expensive
  • In-camera panoramas
  • $4845
  • Medium format
  • Larger sensor
  • Bigger pixels
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