• 35mm 864.0mm2
  • 30.4 megapixels
  • ISO 100 - 32,000
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

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Differences

Canon 5D Mark IV advantages over Pentax K-3 III

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.36 vs 3.76 microns
    Better low-light and dynamic range (all else equal)
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • More cross-type AF points
    41 vs 25
    Cross-type AF points improve autofocus performance
  • More pixels
    30.4 vs 25.7 megapixels
    Higher resolution photos
  • Bigger JPEG buffer
    Unlimited vs 30 shots
    Take more JPEG shots before waiting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

Pentax K-3 III advantages over Canon 5D Mark IV

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Less expensive
    $2344 vs $2899
    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 Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Newer
    4 years vs 8 years old
    Newer cameras often support more advanced features
  • More viewfinder magnification
    1.05x vs 0.71x
    Get a bigger view of the scene through the eye-level viewfinder
  • More AF points
    101 vs 61
    More AF points improve autofocus
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    12.0 fps vs 7.0 fps
    Faster JPEG shooting (burst mode)
  • Higher extended ISO
    1600000 vs 102400 ISO
    Higher extended ISO can give more low-light flexibility

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
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • 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
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash

User reviews

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Buy the Canon 5D Mark IV
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  • Body Only
  • Kit with 24-105mm Lens
  • Kit with 24-70mm Lens
All 5D Mark IV Deals

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Buy the Pentax K-3 III
Body Only
  • Body Only
  • Kit with 20-40mm F2.8-4 Lens
  • Kit with 55-300mm f/4.5-6.3 Lens
All K-3 III Deals

Review Excerpt

  • Superb image quality from RAW files; Improved dynamic range; Excellent high ISO performance; Fast 7fps burst rate with unlimited JPEG buffer; High-quality cinema 4K video; Built-in Wi-Fi; Dual Pixel CMOS AF is very good.

  • JPEG files look soft at default settings; 1/200s flash sync; 4K video codec is cumbersome; 29:59 continuous video recording limit.

  • Read our Canon 5D Mark IV Review

The Competition

Compared to Canon 5D Mark III

Canon 5D Mark IV
Canon 5D Mark III
  • $2249
  • 35mm
  • Shoot 4K video
  • Touchscreen
  • $2079
  • 35mm
  • Less expensive
  • Bigger pixels

Compare Canon 5D Mark IV vs Canon 5D Mark III

Pentax K-3 III
Canon 5D Mark III
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $2079
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-3 III vs Canon 5D Mark III

Compared to Nikon D810

Canon 5D Mark IV
Nikon D810
  • $2249
  • 35mm
  • Shoot 4K video
  • Touchscreen
  • $2291
  • 35mm
  • Less expensive
  • Longer stills battery life

Compare Canon 5D Mark IV vs Nikon D810

Pentax K-3 III
Nikon D810
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $2291
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-3 III vs Nikon D810

Compared to Sony A99 II

Canon 5D Mark IV
Sony A99 II
  • $2249
  • 35mm
  • Lens selection
  • Bigger pixels
  • $3198
  • 35mm
  • Focus peaking
  • Tilt-swivel screen

Compare Canon 5D Mark IV vs Sony A99 II

Pentax K-3 III
Sony A99 II
  • $1847
  • APS-C
  • Lens selection
  • Less expensive
  • $3198
  • 35mm
  • Larger sensor
  • Tilt-swivel screen

Compare Pentax K-3 III vs Sony A99 II

Compared to Pentax KP

Canon 5D Mark IV
Pentax KP
  • $2249
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $999
  • APS-C
  • Less expensive
  • Focus peaking

Compare Canon 5D Mark IV vs Pentax KP

Pentax K-3 III
Pentax KP
  • $1847
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Tiltable Screen

Compare Pentax K-3 III vs Pentax KP

Compared to Pentax K-1 II

Canon 5D Mark IV
Pentax K-1 II
  • $2249
  • 35mm
  • Shoot 4K video
  • Touchscreen
  • $1747
  • 35mm
  • Less expensive
  • Focus peaking

Compare Canon 5D Mark IV vs Pentax K-1 II

Pentax K-3 III
Pentax K-1 II
  • $1847
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $1747
  • 35mm
  • Less expensive
  • Larger sensor

Compare Pentax K-3 III vs Pentax K-1 II

Compare Other Cameras?