• APS-C 337.5mm2
  • 32.5 megapixels
  • ISO 100 - 25,600
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

Buy From

Differences

Canon 90D advantages over Pentax K-3 III

  • Less expensive
    $1349 vs $2344
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Longer stills battery life
    More info 1300 vs 800 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • More cross-type AF points
    45 vs 25
    Cross-type AF points improve autofocus performance
  • More pixels
    32.5 vs 25.7 megapixels
    Higher resolution photos
  • Bigger JPEG buffer
    57 vs 30 shots
    Take more JPEG shots before waiting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/16000 vs 1/8000 sec
    Shoot wide open in bright light

Pentax K-3 III advantages over Canon 90D

  • 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
  • Bigger pixels
    ~ 3.76 vs 3.23 microns
    Better low-light and dynamic range (all else equal)
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Newer
    6 months vs 2 years old
    Newer cameras often support more advanced features
  • Higher-res screen
    540k vs 347k pixels
    More detail on the screen lets you judge focus and composition
  • More viewfinder magnification
    1.05x vs 0.59x
    Get a bigger view of the scene through the eye-level viewfinder
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    101 vs 45
    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 10.0 fps
    Faster JPEG shooting (burst mode)
  • Higher extended ISO
    1600000 vs 51200 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
  • Built-in Bluetooth
    Both provide
    Always-on wireless connectivity
  • 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
  • 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

  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones

User reviews

Buy From

Your purchases support this site

Buy the Canon 90D

Your purchases support this site

Buy the Pentax K-3 III

Review Excerpt

  • Highest resolution Canon APS-C camera yet; Great image quality; Faster 10fps burst shooting; Very fast autofocus; Dual Pixel CMOS AF in Live View; 4K video; 1080p120 slow-mo video.

  • Low-pass filter reduces fine detail from high-res sensor; High ISO performance isn't as good as some rival cameras; Video recording limited to 29:59.

The Competition

Compared to Canon 80D

Canon 90D
Canon 80D
  • $1199
  • APS-C
  • Shoot 4K video
  • Built-in Bluetooth
  • $935
  • APS-C
  • Less expensive
  • Bigger pixels
Pentax K-3 III
Canon 80D
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $935
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Pentax KP

Canon 90D
Pentax KP
  • $1199
  • APS-C
  • Tilt-swivel screen
  • Shoot 4K video
  • $1000
  • APS-C
  • Less expensive
  • Focus peaking
Pentax K-3 III
Pentax KP
  • $1997
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $1000
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Canon 77D

Canon 90D
Canon 77D
  • $1199
  • APS-C
  • Shoot 4K video
  • Longer stills battery life
  • $550
  • APS-C
  • Less expensive
  • NFC
Pentax K-3 III
Canon 77D
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $550
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Nikon D7500

Canon 90D
Nikon D7500
  • $1199
  • APS-C
  • Tilt-swivel screen
  • On-sensor phase detect
  • $997
  • APS-C
  • Bigger pixels
  • Fast startup
Pentax K-3 III
Nikon D7500
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $997
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Canon SL3

Canon 90D
Canon SL3
  • $1199
  • APS-C
  • Longer stills battery life
  • More telephoto lens reach
  • $599
  • APS-C
  • Less expensive
  • Lighter weight
Pentax K-3 III
Canon SL3
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $599
  • APS-C
  • Less expensive
  • Tilt-swivel screen
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