• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • 4/3 224.9mm2
  • 20.3 megapixels
  • ISO 200 - 25,600

Buy From

Differences

Sony A99 advantages over Panasonic G100

  • Larger sensor
    35mm vs 4/3
    More sensor area. Bigger is (generally) better.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 5.97 vs 3.34 microns
    Better low-light and dynamic range (all else equal)
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More pixels
    24.3 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
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Higher extended ISO
    51200 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Panasonic G100 advantages over Sony A99

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • 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
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    54 mm vs 78 mm
    Thinner
  • Newer
    4 years vs 12 years old
    Newer cameras often support more advanced features
  • More dots on screen
    1840k vs 1229k dots
    Can mean greater resolution or a brighter screen
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • 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
  • Tilt-swivel screen
    Both provide
    Tilt and swivel the screen for maximum shooting flexibility
  • 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
  • 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

  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance

User reviews

Buy From

Your purchases support this site

Buy the Sony A99
Body Only
All A99 Deals

Your purchases support this site

Buy the Panasonic G100
Kit with 12-32mm Lens
  • Kit with 12-32mm Lens
  • Kit with Lens + Tripod Grip
All G100 Deals

Review Excerpt

The Competition

Compared to Nikon D800

Sony A99
Nikon D800
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Focus peaking
  • $1850
  • 35mm
  • Lens selection
  • Fast startup

Compare Sony A99 vs Nikon D800

Panasonic G100
Nikon D800
  • $631
  • 4/3
  • Tilt-swivel screen
  • Focus peaking
  • $1850
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Panasonic G100 vs Nikon D800

Compared to Canon 5D Mark III

Sony A99
Canon 5D Mark III
  • $1998
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $2139
  • 35mm
  • Lens selection
  • Fast startup

Compare Sony A99 vs Canon 5D Mark III

Panasonic G100
Canon 5D Mark III
  • $631
  • 4/3
  • Focus peaking
  • Less expensive
  • $2139
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Panasonic G100 vs Canon 5D Mark III

Compared to Nikon D800E

Sony A99
Nikon D800E
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
  • $2212
  • 35mm
  • Lens selection
  • Fast startup

Compare Sony A99 vs Nikon D800E

Panasonic G100
Nikon D800E
  • $631
  • 4/3
  • Tilt-swivel screen
  • Focus peaking
  • $2212
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Panasonic G100 vs Nikon D800E

Compared to Olympus E-M5 III

Sony A99
Olympus E-M5 III
  • $1998
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $824
  • 4/3
  • Lens selection
  • Shoot 4K video

Compare Sony A99 vs Olympus E-M5 III

Panasonic G100
Olympus E-M5 III
  • $631
  • 4/3
  • Less expensive
  • In-camera panoramas
  • $824
  • 4/3
  • In-Camera Image Stabilization
  • High resolution composite

Compare Panasonic G100 vs Olympus E-M5 III

Compared to Olympus E-M10 IV

Sony A99
Olympus E-M10 IV
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
  • $649
  • 4/3
  • Lens selection
  • Shoot 4K video

Compare Sony A99 vs Olympus E-M10 IV

Panasonic G100
Olympus E-M10 IV
  • $631
  • 4/3
  • Less expensive
  • Tilt-swivel screen
  • $649
  • 4/3
  • In-Camera Image Stabilization
  • More telephoto lens reach

Compare Panasonic G100 vs Olympus E-M10 IV

Compare Other Cameras?