• 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102,400
  • 4/3 224.9mm2
  • 20.3 megapixels
  • ISO 200 - 25,600

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Differences

Sony A7S advantages over Panasonic GX8

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 8.40 vs 3.34 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    3,702 vs 806 iso
    Take photos in low light with less noise
  • Thinner
    48 mm vs 63 mm
    Thinner
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    409600 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Panasonic GX8 advantages over Sony A7S

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $998 vs $1998
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Fast startup
    ~1.20 vs 2.0 sec
    Faster startup lets you catch the moment
  • More viewfinder magnification
    0.77x vs 0.71x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    20.3 vs 12.2 megapixels
    Higher resolution photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    8.3 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 62 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    7.9 fps vs 5.0 fps
    Faster RAW shooting in burst mode
  • 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 panoramas
    Both provide
    Stitches multiple shots into a panoramic photo
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • NFC
    Both provide
    Simplifies pairing your camera with supported phones
  • 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 Bluetooth
    Neither provide
    Always-on wireless connectivity
  • 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
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • Dual card slots
    Neither provide
    Gives you more storage flexibility

User reviews

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Your purchases support this site

Buy the Panasonic GX8

Review Excerpt

  • Outstanding high ISO performance; excellent dynamic range; 4K video recording (via uncompressed HDMI); XAVC S option for HD video; Slightly improved battery life over A7/A7R; Built-in Wi-Fi & NFC connectivity.

  • 4K video requires expensive external recorder; Sluggish startup time; Loud shutter; Silent Shooting mode hurts image quality; Lacks a built-in, pop-up flash; Limited selection of native Sony FE lenses.

  • 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.

The Competition

Compared to Leica M-E (Typ 220)

Sony A7S
Leica M-E (Typ 220)
  • $1998
  • 35mm
  • Lens selection
  • Less expensive
  • $4309
  • 35mm
  • Thinner
  • More pixels
Panasonic GX8
Leica M-E (Typ 220)
  • $1098
  • 4/3
  • Lens selection
  • Less expensive
  • $4309
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Olympus E-M1

Sony A7S
Olympus E-M1
  • $1998
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1099
  • 4/3
  • Lens selection
  • Less expensive
Panasonic GX8
Olympus E-M1
  • $1098
  • 4/3
  • Less expensive
  • Tilt-swivel screen
  • $1099
  • 4/3
  • Fast startup
  • On-sensor phase detect

Compared to Sony A7S II

Sony A7S
Sony A7S II
  • $1998
  • 35mm
  • Fast startup
  • Higher effective ISO
  • $2198
  • 35mm
  • In-Camera Image Stabilization
  • Shoot 4K video
Panasonic GX8
Sony A7S II
  • $1098
  • 4/3
  • Lens selection
  • Less expensive
  • $2198
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Leica M (Typ 262)

Sony A7S
Leica M (Typ 262)
  • $1998
  • 35mm
  • Lens selection
  • Focus peaking
  • $4530
  • 35mm
  • Newer
  • More pixels
Panasonic GX8
Leica M (Typ 262)
  • $1098
  • 4/3
  • Lens selection
  • Focus peaking
  • $4530
  • 35mm
  • Larger sensor
  • Bigger pixels

Compared to Olympus E-M1 II

Sony A7S
Olympus E-M1 II
  • $1998
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1599
  • 4/3
  • Lens selection
  • Less expensive
Panasonic GX8
Olympus E-M1 II
  • $1098
  • 4/3
  • Less expensive
  • In-camera panoramas
  • $1599
  • 4/3
  • High resolution composite
  • Fast startup
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