• APS-C 368.2mm2
  • 14.6 megapixels
  • ISO 100 - 3200
  • APS-C 332.3mm2
  • 18.0 megapixels
  • ISO 100 - 12,800

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Differences

Pentax K20D advantages over Canon T4i

  • Larger sensor
    APS-C vs APS-C
    More sensor area. Bigger is (generally) better.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 5.05 vs 4.30 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.40 vs 0.7 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 530 vs 440 shots
    Capture more 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
  • Less shutter lag
    0.17 vs 0.27 sec
    Focus and take a photo quickly (wide angle)
  • More viewfinder magnification
    0.63x vs 0.53x
    Get a bigger view of the scene through the eye-level viewfinder
  • Bigger JPEG buffer
    38 vs 19 shots
    Take more JPEG shots before waiting (burst mode)

Canon T4i advantages over Pentax K20D

  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Higher effective ISO
    722 vs 639 iso
    Take photos in low light with less noise
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More dots on screen
    1040k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    18.0 vs 14.6 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Faster JPEG shooting
    4.8 fps vs 2.8 fps
    Faster JPEG shooting (burst mode)
  • Higher extended ISO
    25600 vs 6400 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
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Bulb shutter
    Both provide
    Hold the shutter open manually for long exposures

Common Weaknesses

  • Focus peaking
    Neither provide
    Your camera will highlight what's in focus
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Buy the Pentax K20D

Your purchases support this site

Buy the Canon T4i
Body Only
  • Body Only
  • Kit with 18-135mm Lens
  • Kit with 18-55mm Lens
All T4i Deals

Review Excerpt

  • Excellent image quality; 9 cross-type AF points; Stereo microphones; Built-in touchscreen; Multi-shot modes.

  • Slow Live View and video autofocus; High ISO performance is unimproved; Below-average battery life; No dedicated AF illuminator.

  • Read our Canon T4i Review

The Competition

Compared to Canon T5i

Pentax K20D
Canon T5i
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $539
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Pentax K20D vs Canon T5i

Canon T4i
Canon T5i
  • $579
  • APS-C
  • More telephoto lens reach
  • $539
  • APS-C
  • Less expensive
  • Lighter weight

Compare Canon T4i vs Canon T5i

Compared to Samsung GX-20

Pentax K20D
Samsung GX-20
  • $800
  • APS-C
  • Less expensive
  • $1400
  • APS-C
  • Higher effective ISO

Compare Pentax K20D vs Samsung GX-20

Canon T4i
Samsung GX-20
  • $579
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
  • $1400
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compare Canon T4i vs Samsung GX-20

Compared to Sony DSLR-A380

Pentax K20D
Sony DSLR-A380
  • $800
  • APS-C
  • Lens selection
  • Fast startup
  • $849
  • APS-C
  • Tiltable Screen
  • HDMI out

Compare Pentax K20D vs Sony DSLR-A380

Canon T4i
Sony DSLR-A380
  • $579
  • APS-C
  • Lens selection
  • Tilt-swivel screen
  • $849
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compare Canon T4i vs Sony DSLR-A380

Compared to Pentax K-7

Pentax K20D
Pentax K-7
  • $800
  • APS-C
  • Less expensive
  • Fast startup
  • $1300
  • APS-C
  • Longer stills battery life
  • HDMI out

Compare Pentax K20D vs Pentax K-7

Canon T4i
Pentax K-7
  • $579
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
  • $1300
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compare Canon T4i vs Pentax K-7

Compared to Canon T3i

Pentax K20D
Canon T3i
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K20D vs Canon T3i

Canon T4i
Canon T3i
  • $579
  • APS-C
  • Touchscreen
  • Fast startup
  • $549
  • APS-C

Compare Canon T4i vs Canon T3i

Compare Other Cameras?