• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • 35mm 861.6mm2
  • 36.4 megapixels
  • ISO 100 - 819,200

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Differences

Pentax K-3 advantages over Pentax K-1 II

  • Fast startup
    ~0.90 vs 1.4 sec
    Faster startup lets you catch the moment
  • 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
  • Faster JPEG shooting
    7.1 fps vs 4.5 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    7.1 fps vs 4.6 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    24 vs 17 shots
    Larger buffer for RAW shots (burst mode)

Pentax K-1 II advantages over Pentax K-3

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 4.88 vs 3.91 microns
    Better low-light and dynamic range (all else equal)
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Newer
    6 years vs 10 years old
    Newer cameras often support more advanced features
  • More viewfinder magnification
    0.70x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    36.4 vs 24.4 megapixels
    Higher resolution photos
  • Higher extended ISO
    819200 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
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Dual card slots
    Both provide
    Gives you more storage flexibility
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Buy the Pentax K-3
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  • Body Only
  • Kit with 18-135mm Lens
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Buy the Pentax K-1 II
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  • Body Only
  • Kit with 28-105mm Lens
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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

  • Read our Pentax K-3 Review

  • Excellent build and comfortable handling; Bright, roomy viewfinder and articulated LCD; Great image quality; Good performance for the class; In-camera stabilization, GPS and Wi-Fi; Incredibly feature-rich design.

  • Bulkier than APS-C DSLRs; Top ISOs are for the spec sheet, not the real world; JPEGs are a bit punchy by default; Slow startup; Below-average battery life; Only a relatively modest update to the K-1.

  • Read our Pentax K-1 II Review

The Competition

Compared to Nikon D7100

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $695
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Pentax K-1 II
Nikon D7100
  • $1747
  • 35mm
  • Focus peaking
  • Larger sensor
  • $695
  • APS-C
  • Less expensive
  • Fast startup

Compare Pentax K-1 II vs Nikon D7100

Compared to Nikon D5300

Pentax K-3
Nikon D5300
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Tilt-swivel screen
  • Fast startup

Compare Pentax K-3 vs Nikon D5300

Pentax K-1 II
Nikon D5300
  • $1747
  • 35mm
  • Focus peaking
  • Larger sensor
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-1 II vs Nikon D5300

Compared to Nikon D7200

Pentax K-3
Nikon D7200
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1043
  • APS-C
  • Fast startup
  • Built-in Wi-Fi

Compare Pentax K-3 vs Nikon D7200

Pentax K-1 II
Nikon D7200
  • $1747
  • 35mm
  • Focus peaking
  • Larger sensor
  • $1043
  • APS-C
  • Less expensive
  • Fast startup

Compare Pentax K-1 II vs Nikon D7200

Compared to Pentax K-1

Pentax K-3
Pentax K-1
  • $699
  • APS-C
  • Less expensive
  • Fast startup
  • $1800
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-3 vs Pentax K-1

Pentax K-1 II
Pentax K-1
  • $1747
  • 35mm
  • Higher extended ISO
  • $1800
  • 35mm

Compare Pentax K-1 II vs Pentax K-1

Compared to Nikon D850

Pentax K-3
Nikon D850
  • $699
  • APS-C
  • In-Camera Image Stabilization
  • Internal flash
  • $2664
  • 35mm
  • Larger sensor
  • Shoot 4K video

Compare Pentax K-3 vs Nikon D850

Pentax K-1 II
Nikon D850
  • $1747
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
  • $2664
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compare Pentax K-1 II vs Nikon D850

Compare Other Cameras?