• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • APS-C 364.3mm2
  • 19.6 megapixels
  • ISO 100 - 6400

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Differences

Sony A99 advantages over Sigma sd Quattro

  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Lens selection
    Good vs Limited
    Better lens selection gives you more options
  • Larger sensor
    35mm vs APS-C
    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 4.33 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • 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
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    24.3 vs 19.6 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Faster RAW shooting
    5.9 fps vs 3.6 fps
    Faster RAW shooting in burst mode
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    51200 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

Sigma sd Quattro advantages over Sony A99

  • Less expensive
    $899 vs $1998*
    Save money for lenses or accessories
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Newer
    2 years vs 6 years old
    Newer cameras often support more advanced features
  • Lighter weight
    625g vs 828g
    Lighter weight
  • More dots on screen
    1620k vs 1229k dots
    Can mean greater resolution or a brighter screen
  • Doesn't require an AA filter
    Yes vs No
    A unique sensor design provides sharp photos without moiré

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
  • 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

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

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
Sigma sd Quattro
Nikon D800
  • $699
  • APS-C
  • Focus peaking
  • On-sensor phase detect
  • $1850
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Canon 5D Mark III

Sony A99
Canon 5D Mark III
  • $1998
  • 35mm
  • Less expensive
  • Tilt-swivel screen
  • $2520
  • 35mm
  • Lens selection
  • Fast startup
Sigma sd Quattro
Canon 5D Mark III
  • $699
  • APS-C
  • Less expensive
  • Focus peaking
  • $2520
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Nikon D800E

Sony A99
Nikon D800E
  • $1998
  • 35mm
  • Focus peaking
  • Tilt-swivel screen
  • $2212
  • 35mm
  • Lens selection
  • Fast startup
Sigma sd Quattro
Nikon D800E
  • $699
  • APS-C
  • Focus peaking
  • On-sensor phase detect
  • $2212
  • 35mm
  • Lens selection
  • Larger sensor

Compared to Sigma sd Quattro H

Sony A99
Sigma sd Quattro H
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Lens selection
  • $1099
  • APS-H
  • Less expensive
  • On-sensor phase detect
Sigma sd Quattro
Sigma sd Quattro H
  • $699
  • APS-C
  • Less expensive
  • Bigger RAW buffer
  • $1099
  • APS-H
  • Larger sensor
  • More viewfinder magnification

Compared to Fujifilm X-H1

Sony A99
Fujifilm X-H1
  • $1998
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
  • $1649
  • APS-C
  • Shoot 4K video
  • Touchscreen
Sigma sd Quattro
Fujifilm X-H1
  • $699
  • APS-C
  • Less expensive
  • More dots on screen
  • $1649
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
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