• 35mm 855.6mm2
  • 20.2 megapixels
  • ISO 100 - 25,600
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

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Differences

Canon 6D advantages over Pentax K-3 III

  • Less expensive
    $1555 vs $2344
    Save money for lenses or accessories
  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.54 vs 3.76 microns
    Better low-light and dynamic range (all else equal)
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 1090 vs 800 shots
    Capture more photos
  • Bigger JPEG buffer
    1250 vs 30 shots
    Take more JPEG shots before waiting (burst mode)

Pentax K-3 III advantages over Canon 6D

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • 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
  • More cross-type AF points
    25 vs 1
    Cross-type AF points improve autofocus performance
  • Newer
    4 years vs 12 years old
    Newer cameras often support more advanced features
  • Higher-res screen
    540k vs 348k pixels
    More detail on the screen lets you judge focus and composition
  • More viewfinder magnification
    1.05x vs 0.71x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    25.7 vs 20.2 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    101 vs 11
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    12.0 fps vs 4.4 fps
    Faster JPEG shooting (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • 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
  • 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
  • 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
  • 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

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Buy the Canon 6D
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  • Body Only
  • Kit with 24-105mm Lens
All 6D 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

  • Excellent image quality on par to more expensive full-frame DSLRs (including the 5D Mark III); Responsive all-around performer; Superior HD video-shooting chops; Built-in Wi-Fi with remote control and sharing features, Built-in GPS and geotagging.

  • Lacks a built-in, pop-up flash; No external headphone jack; Rather basic 11-point autofocus system; Mediocre burst speed.

  • Read our Canon 6D Review

The Competition

Compared to Canon 5D Mark III

Canon 6D
Canon 5D Mark III
  • $1499
  • 35mm
  • Less expensive
  • Built-in Wi-Fi
  • $2079
  • 35mm
  • More cross-type AF points
  • Less shutter lag

Compare Canon 6D 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 D610

Canon 6D
Nikon D610
  • $1499
  • 35mm
  • Less expensive
  • Built-in Wi-Fi
  • $1196
  • 35mm
  • Fast startup
  • Higher effective ISO

Compare Canon 6D vs Nikon D610

Pentax K-3 III
Nikon D610
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1196
  • 35mm
  • Less expensive
  • Larger sensor

Compare Pentax K-3 III vs Nikon D610

Compared to Canon 7D Mark II

Canon 6D
Canon 7D Mark II
  • $1499
  • 35mm
  • Less expensive
  • Larger sensor
  • $1597
  • APS-C
  • On-sensor phase detect
  • More telephoto lens reach

Compare Canon 6D vs Canon 7D Mark II

Pentax K-3 III
Canon 7D Mark II
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1597
  • APS-C
  • Less expensive
  • Built-in GPS

Compare Pentax K-3 III vs Canon 7D Mark II

Compared to Nikon D600

Canon 6D
Nikon D600
  • $1499
  • 35mm
  • Built-in Wi-Fi
  • Built-in GPS
  • $1900
  • 35mm
  • Fast startup
  • Higher effective ISO

Compare Canon 6D vs Nikon D600

Pentax K-3 III
Nikon D600
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1900
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-3 III vs Nikon D600

Compared to Nikon D750

Canon 6D
Nikon D750
  • $1499
  • 35mm
  • Less expensive
  • Built-in GPS
  • $1700
  • 35mm
  • Tiltable Screen
  • Higher effective ISO

Compare Canon 6D vs Nikon D750

Pentax K-3 III
Nikon D750
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1700
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-3 III vs Nikon D750

Compare Other Cameras?