• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • 35mm 864.0mm2
  • 30.3 megapixels
  • ISO 100 - 40,000

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Differences

Pentax K-3 advantages over Canon EOS R

  • Less expensive
    $999 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
  • Fast startup
    ~0.90 vs 2.1 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 560 vs 370 shots
    Capture more photos
  • More telephoto lens reach
    203 mm vs 105 mm
    Capture objects farther away with the kit lens
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré

Canon EOS R advantages over Pentax K-3

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Bigger pixels
    ~ 5.36 vs 3.91 microns
    Better low-light and dynamic range (all else equal)
  • 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
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Higher effective ISO
    2,742 vs 1,216 iso
    Take photos in low light with less noise
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Newer
    2 years vs 7 years old
    Newer cameras often support more advanced features
  • More dots on screen
    2100k vs 1037k dots
    Can mean greater resolution or a brighter screen
  • More viewfinder magnification
    0.76x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    30.3 vs 24.4 megapixels
    Higher resolution photos
  • Wider angle kit lens
    24 mm vs 27 mm
    Capture more of the scene with the included lens
  • Faster JPEG shooting
    8.0 fps vs 7.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    126 vs 75 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    8.0 fps vs 7.1 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    65 vs 24 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    102400 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
  • 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
  • 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
  • Built-in GPS
    Neither provide
    Geotag your photos

User reviews

Buy From

Review Excerpt

  • Top-notch image quality; Great ergonomics in a compact body; Unique on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots; Optional Wi-Fi remote control

  • AE Lock button is poorly located; Below-average battery life for a DSLR; Rather dated-looking menu system; Requires a different battery grip accessory than its predecessors; Less third-party support than some rivals

  • Very good overall image quality; Good dynamic range & very good high ISO performance; Excellent Dual Pixel CMOS AF performance; Sharp native lenses; Great performance with adapted optics; Compact design; Fully articulating LCD.

  • Sensor performance lags behind competition; No In-Body Image Stabilization; Sluggish burst speed with C-AF; Mediocre battery life; No 4Kp60; 1.7x 4K crop; Ergonomics could be better.

The Competition

Compared to Nikon D7100

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $810
  • APS-C
  • Fast startup
  • Longer stills battery life
Canon EOS R
Nikon D7100
  • $1799
  • 35mm
  • Tilt-swivel screen
  • Focus peaking
  • $810
  • APS-C
  • Less expensive
  • Fast startup

Compared to Canon 70D

Pentax K-3
Canon 70D
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1049
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Canon EOS R
Canon 70D
  • $1799
  • 35mm
  • Focus peaking
  • Larger sensor
  • $1049
  • APS-C
  • Less expensive
  • Fast startup

Compared to Nikon D5300

Pentax K-3
Nikon D5300
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Canon EOS R
Nikon D5300
  • $1799
  • 35mm
  • Focus peaking
  • Larger sensor
  • $549
  • APS-C
  • Less expensive
  • Fast startup

Compared to Nikon Z7

Pentax K-3
Nikon Z7
  • $699
  • APS-C
  • Less expensive
  • Fast startup
  • $2597
  • 35mm
  • Larger sensor
  • Shoot 4K video
Canon EOS R
Nikon Z7
  • $1799
  • 35mm
  • Tilt-swivel screen
  • Bigger pixels
  • $2597
  • 35mm
  • In-Camera Image Stabilization
  • Fast startup

Compared to Nikon Z6

Pentax K-3
Nikon Z6
  • $699
  • APS-C
  • Less expensive
  • Fast startup
  • $1797
  • 35mm
  • Larger sensor
  • Bigger pixels
Canon EOS R
Nikon Z6
  • $1799
  • 35mm
  • Tilt-swivel screen
  • More telephoto lens reach
  • $1797
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
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