• APS-C 364.3mm2
  • 19.6 megapixels
  • ISO 100 - 6400
  • 35mm 861.6mm2
  • 42.4 megapixels
  • ISO 100 - 32,000

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Differences

Sigma sd Quattro advantages over Sony A7R III

  • Less expensive
    $899 vs $1998
    Save money for lenses or accessories
  • Doesn't require an AA filter
    Yes vs No
    A unique sensor design provides sharp photos without moiré

Sony A7R III advantages over Sigma sd Quattro

  • 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
  • Shoot 4K video
    4K (UHD) vs No
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • 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
    42.4 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
    9.2 fps vs 3.6 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    30 vs 14 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 vs 6400 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
  • On-sensor phase detect
    Both provide
    Usually improves live view and video AF performance
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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

User reviews

Buy From

Your purchases support this site

Buy the Sony A7R III

Review Excerpt

  • Fantastic image quality; Improved dynamic range over its predecessor; Very good high ISO performance; Much improved real-world AF performance; Class-leading burst rates, even with RAW; Improved 5-axis in-body image stabilization; Better 4K video quality; 1080/120fps video; Dual card slots; Significantly better battery life.

  • Expensive; Menus still confusing; UHS-II support only on one card slot; No optical low-pass filter means greater risk of moire; No built-in flash; Buffer clearing still slow despite UHS-II support.

The Competition

Compared to Sony A3000

Sigma sd Quattro
Sony A3000
  • $699
  • APS-C
  • On-sensor phase detect
  • HDMI out
  • $500
  • APS-C
  • Lens selection
  • In-camera panoramas
Sony A7R III
Sony A3000
  • $2248
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
  • $500
  • APS-C
  • In-camera panoramas
  • Internal flash

Compared to Sony A7R II

Sigma sd Quattro
Sony A7R II
  • $699
  • APS-C
  • Less expensive
  • More dots on screen
  • $2898
  • 35mm
  • Lens selection
  • Larger sensor
Sony A7R III
Sony A7R II
  • $2248
  • 35mm
  • Less expensive
  • Touchscreen
  • $2898
  • 35mm
  • In-camera panoramas

Compared to Sigma sd Quattro H

Sigma sd Quattro
Sigma sd Quattro H
  • $699
  • APS-C
  • Bigger RAW buffer
  • $1199
  • APS-H
  • Larger sensor
  • More pixels
Sony A7R III
Sigma sd Quattro H
  • $2248
  • 35mm
  • Lens selection
  • Larger sensor
  • $1199
  • APS-H
  • Doesn't require an AA filter

Compared to Fujifilm X-H1

Sigma sd Quattro
Fujifilm X-H1
  • $699
  • APS-C
  • More dots on screen
  • $1000
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
Sony A7R III
Fujifilm X-H1
  • $2248
  • 35mm
  • Larger sensor
  • High resolution composite
  • $1000
  • APS-C
  • Less expensive
  • In-camera panoramas

Compared to Nikon Z7 II

Sigma sd Quattro
Nikon Z7 II
  • $699
  • APS-C
  • Less expensive
  • Doesn't require an AA filter
  • $2530
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
Sony A7R III
Nikon Z7 II
  • $2248
  • 35mm
  • Less expensive
  • High resolution composite
  • $2530
  • 35mm
  • Top deck display
  • Newer
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