• APS-C 332.3mm2
  • 24.1 megapixels
  • ISO 100 - 25,600
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

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Differences

Canon T8i advantages over Pentax K-3 III

  • Less expensive
    $899 vs $2444
    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
  • 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
  • Lighter weight
    515g vs 820g
    Lighter weight

Pentax K-3 III advantages over Canon T8i

  • 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 GPS
    GPS vs None
    Geotag your photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Pentaprism viewfinder
    Pentaprism vs Pentamirror
    Much better viewfinder picture fidelity
  • Higher-res screen
    540k vs 346k pixels
    More detail on the screen lets you judge focus and composition
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    101 vs 45
    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 shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    1600000 vs 51200 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • 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
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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

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

User reviews

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Your purchases support this site

Buy the Pentax K-3 III

Review Excerpt

The Competition

Compared to Nikon D5600

Canon T8i
Nikon D5600
  • $749
  • APS-C
  • Focus peaking
  • Shoot 4K video
  • $897
  • APS-C
  • Larger sensor
  • NFC
Pentax K-3 III
Nikon D5600
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $897
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Pentax KP

Canon T8i
Pentax KP
  • $749
  • APS-C
  • Tilt-swivel screen
  • Shoot 4K video
  • $999
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
Pentax K-3 III
Pentax KP
  • $1997
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Tiltable Screen

Compared to Canon T7i

Canon T8i
Canon T7i
  • $749
  • APS-C
  • Focus peaking
  • Shoot 4K video
  • $700
  • APS-C
  • NFC
Pentax K-3 III
Canon T7i
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $700
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Canon SL3

Canon T8i
Canon SL3
  • $749
  • APS-C
  • Focus peaking
  • More cross-type AF points
  • $599
  • APS-C
  • Less expensive
Pentax K-3 III
Canon SL3
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $599
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Canon 90D

Canon T8i
Canon 90D
  • $749
  • APS-C
  • Less expensive
  • Focus peaking
  • $1199
  • APS-C
  • More telephoto lens reach
  • Top deck display
Pentax K-3 III
Canon 90D
  • $1997
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1199
  • APS-C
  • Less expensive
  • Tilt-swivel screen
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