• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • 4/3 224.9mm2
  • 20.3 megapixels
  • ISO 200 - 25,600

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Differences

Pentax K-3 advantages over Panasonic GH5 II

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 3.91 vs 3.34 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 560 vs 410 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More pixels
    24.4 vs 20.3 megapixels
    Higher resolution photos
  • Optional anti-aliasing filter
    Optional vs None
    Lets you choose sharper photos or reduced moiré
  • Higher extended ISO
    51200 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Panasonic GH5 II advantages over Pentax K-3

  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Shoot 4K video
    5K 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
  • More dots on screen
    1840k 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
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    12.0 fps vs 7.1 fps
    Faster JPEG shooting (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

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
  • 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
  • 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

  • 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
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance

User reviews

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Buy the Pentax K-3
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  • Body Only
  • Kit with 18-135mm Lens
All K-3 Deals

Your purchases support this site

Buy the Panasonic GH5 II
Body Only
  • Body Only
  • Kit with 12-35mm F2.8 Lens
  • Kit with 12-60mm Lens
All GH5 II Deals

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

The Competition

Compared to Nikon D7100

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $690
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Panasonic GH5 II
Nikon D7100
  • $1298
  • 4/3
  • Tilt-swivel screen
  • Focus peaking
  • $690
  • APS-C
  • Less expensive
  • Larger sensor

Compare Panasonic GH5 II vs Nikon D7100

Compared to Canon 70D

Pentax K-3
Canon 70D
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1149
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Pentax K-3 vs Canon 70D

Panasonic GH5 II
Canon 70D
  • $1298
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $1149
  • APS-C
  • Less expensive
  • Larger sensor

Compare Panasonic GH5 II vs Canon 70D

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

Panasonic GH5 II
Nikon D5300
  • $1298
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Less expensive
  • Larger sensor

Compare Panasonic GH5 II vs Nikon D5300

Compared to Sony A77 II

Pentax K-3
Sony A77 II
  • $699
  • APS-C
  • Lens selection
  • More telephoto lens reach
  • $1198
  • APS-C
  • Tilt-swivel screen
  • In-camera panoramas

Compare Pentax K-3 vs Sony A77 II

Panasonic GH5 II
Sony A77 II
  • $1298
  • 4/3
  • Lens selection
  • Shoot 4K video
  • $1198
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Panasonic GH5 II vs Sony A77 II

Compared to Nikon D7200

Pentax K-3
Nikon D7200
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1016
  • APS-C
  • Fast startup
  • Built-in Wi-Fi

Compare Pentax K-3 vs Nikon D7200

Panasonic GH5 II
Nikon D7200
  • $1298
  • 4/3
  • Focus peaking
  • Tilt-swivel screen
  • $1016
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Panasonic GH5 II vs Nikon D7200

Compare Other Cameras?