• 4/3 224.9mm2
  • 20.3 megapixels
  • ISO 200 - 25,600
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

Buy From

Differences

Panasonic GX8 advantages over Pentax K-3 III

  • Less expensive
    $998* vs $2344
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Lighter weight
    487g vs 820g
    Lighter weight
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Bigger JPEG buffer
    Unlimited vs 30 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster shutter
    1/16000 vs 1/8000 sec
    Shoot wide open in bright light

Pentax K-3 III advantages over Panasonic GX8

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Longer stills battery life
    More info 800 vs 340 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Newer
    4 years vs 9 years old
    Newer cameras often support more advanced features
  • Higher-res screen
    540k vs 346k pixels
    More detail on the screen lets you judge focus and composition
  • More viewfinder magnification
    1.05x vs 0.77x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    25.7 vs 20.3 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • 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 JPEG shooting
    12.0 fps vs 8.3 fps
    Faster JPEG shooting (burst mode)
  • Higher extended ISO
    1600000 vs 25600 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
  • 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
  • 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

  • Built-in GPS
    Neither provide
    Geotag your photos
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Your purchases support this site

Buy the Panasonic GX8
Body Only (Black)
  • Body Only (Black)
  • Body Only (Silver)
All GX8 Deals

Your purchases support this site

Buy the Pentax K-3 III
Body Only
  • Body Only
  • Kit with 20-40mm F2.8-4 Lens
  • Kit with 55-300mm f/4.5-6.3 Lens
All K-3 III Deals

Review Excerpt

  • Highest resolution Micro Four Thirds camera yet; Great high ISO performance; Very fast autofocus; Fast burst mode with deep buffers; Impressive Dual I.S. system; Great 4K video.

  • No built-in flash; Slow buffer clearing; Below average battery life; Limited I.S. for 4K video.

  • Read our Panasonic GX8 Review

The Competition

Compared to Olympus E-M1

Panasonic GX8
Olympus E-M1
  • $998
  • 4/3
  • Tilt-swivel screen
  • Shoot 4K video
  • $1099
  • 4/3
  • Fast startup
  • On-sensor phase detect

Compare Panasonic GX8 vs Olympus E-M1

Pentax K-3 III
Olympus E-M1
  • $1847
  • APS-C
  • Larger sensor
  • Shoot 4K video
  • $1099
  • 4/3
  • Less expensive
  • Tiltable Screen

Compare Pentax K-3 III vs Olympus E-M1

Compared to Olympus E-M5 II

Panasonic GX8
Olympus E-M5 II
  • $998
  • 4/3
  • Shoot 4K video
  • In-camera panoramas
  • $899
  • 4/3
  • High resolution composite
  • Fast startup

Compare Panasonic GX8 vs Olympus E-M5 II

Pentax K-3 III
Olympus E-M5 II
  • $1847
  • APS-C
  • Larger sensor
  • Shoot 4K video
  • $899
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Olympus E-M5 II

Compared to Olympus E-M1 II

Panasonic GX8
Olympus E-M1 II
  • $998
  • 4/3
  • In-camera panoramas
  • NFC
  • $899
  • 4/3
  • High resolution composite
  • Fast startup

Compare Panasonic GX8 vs Olympus E-M1 II

Pentax K-3 III
Olympus E-M1 II
  • $1847
  • APS-C
  • Larger sensor
  • Built-in Bluetooth
  • $899
  • 4/3
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Olympus E-M1 II

Compared to Pentax KP

Panasonic GX8
Pentax KP
  • $998
  • 4/3
  • Tilt-swivel screen
  • Shoot 4K video
  • $999
  • APS-C
  • Larger sensor
  • Bigger pixels

Compare Panasonic GX8 vs Pentax KP

Pentax K-3 III
Pentax KP
  • $1847
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Tiltable Screen

Compare Pentax K-3 III vs Pentax KP

Compared to Canon 90D

Panasonic GX8
Canon 90D
  • $998
  • 4/3
  • Less expensive
  • Focus peaking
  • $1099
  • APS-C
  • Larger sensor
  • Fast startup

Compare Panasonic GX8 vs Canon 90D

Pentax K-3 III
Canon 90D
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1099
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Canon 90D

Compare Other Cameras?