• 35mm 858.0mm2
  • 20.8 megapixels
  • ISO 100 - 102,400
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

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Differences

Nikon D5 advantages over Pentax K-3 III

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.45 vs 3.76 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 3780 vs 800 shots
    Capture more photos
  • More cross-type AF points
    99 vs 25
    Cross-type AF points improve autofocus performance
  • More AF points
    153 vs 101
    More AF points improve autofocus
  • Bigger JPEG buffer
    200 vs 30 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    3276800 vs 1600000 ISO
    Higher extended ISO can give more low-light flexibility

Pentax K-3 III advantages over Nikon D5

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Less expensive
    $2344 vs $3789*
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Newer
    3 years vs 8 years old
    Newer cameras often support more advanced features
  • Lighter weight
    820g vs 1415g
    Lighter weight
  • More viewfinder magnification
    1.05x vs 0.72x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    25.7 vs 20.8 megapixels
    Higher resolution photos
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Shoot 4K video
    Both provide
    Make sure you have a fast computer
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • 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
  • Pentaprism viewfinder
    Both provide
    Much better viewfinder picture fidelity
  • 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
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • 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 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Your purchases support this site

Buy the Nikon D5

Your purchases support this site

Buy the Pentax K-3 III

Review Excerpt

  • Excellent image quality; Excellent high ISO performance; Fast 153-point autofocus system; Fast continuous shooting speeds; 4K video recording; Pro-quality camera body; Outstanding battery life.

  • Large and heavy body might not be right for all; Loud shutter; Underutilized touchscreen; Low ISO dynamic range not as good as predecessor; Extended high ISOs not very useful; Sluggish Live View AF.

The Competition

Compared to Canon EOS-1D C

Nikon D5
Canon EOS-1D C
  • $5143
  • 35mm
  • Touchscreen
  • More cross-type AF points
  • $6989
  • 35mm
Pentax K-3 III
Canon EOS-1D C
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $6989
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Nikon D4S

Nikon D5
Nikon D4S
  • $5143
  • 35mm
  • Less expensive
  • Shoot 4K video
  • $5999
  • 35mm
  • Fast startup
  • Higher effective ISO
Pentax K-3 III
Nikon D4S
  • $1847
  • APS-C
  • Less expensive
  • Focus peaking
  • $5999
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Canon 1DX Mark II

Nikon D5
Canon 1DX Mark II
  • $5143
  • 35mm
  • Fast startup
  • Longer stills battery life
  • $2999
  • 35mm
  • Less expensive
  • Higher effective ISO
Pentax K-3 III
Canon 1DX Mark II
  • $1847
  • APS-C
  • Focus peaking
  • Less expensive
  • $2999
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Pentax KP

Nikon D5
Pentax KP
  • $5143
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $999
  • APS-C
  • Focus peaking
  • Less expensive
Pentax K-3 III
Pentax KP
  • $1847
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Canon 90D

Nikon D5
Canon 90D
  • $5143
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1199
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Pentax K-3 III
Canon 90D
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1199
  • APS-C
  • Less expensive
  • Tilt-swivel screen
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