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Sony A7R III vs Sigma Quattro Comparison

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Sony A7R III

42 MP | Full frame (35.9 x 24 mm) BSI-CMOS Sensor

Sony A7R III
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Sigma Quattro

29 MP | APS-C (23.5 x 15.6 mm) CMOS (Foveon X3) Sensor

Sigma Quattro
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Sony A7R III vs Sigma Quattro Comparison Overview

Here we are comparing A7R III and Quattro, two Mirrorless cameras from Sony and Sigma. Sony Alpha A7R III is a Pro Mirrorless class camera and Sigma sd Quattro is a Advanced Mirrorless class camera.

Sony A7R III was introduced to the market in October 2017 and Sigma Quattro was launched in February 2016. There is 20 months difference between A7R III and Quattro so we don't expect to see a huge technology difference between these two cameras but it would still give an advantage to younger A7R III, especially in sensor tech.

Here is a brief look at the main features of the Sony A7R III and Sigma Quattro before getting into our more detailed comparison.

Sony A7R III Key Specs

  • Announcement Date: 2017-10-25
  • 42MP - Full frame BSI-CMOS Sensor
  • No Anti-aliasing (AA) filter
  • ISO 100 - 32000 ( expands to 50 - 102400)
  • Sony E Mount
  • Sensor-shift Image Stabilization
  • 3.00" Tilting Screen
  • 3686k dot Electronic viewfinder
  • 10.0fps continuous shooting
  • 4K (UHD) - 3840 x 2160 video resolution
  • Built-in Wireless
  • 657g. 127 x 96 x 74 mm
  • Weather-sealed Body
  • Replaced Sony Alpha A7R II Compare

Sigma Quattro Key Specs

  • Announcement Date: 2016-02-23
  • 29MP - APS-C CMOS (Foveon X3) Sensor
  • No Anti-aliasing (AA) filter
  • ISO 100 - 6400
  • Sigma SA Bayonet Mount
  • 3.00" Fixed Type Screen
  • 2360k dot Electronic viewfinder
  • 3.6fps continuous shooting
  • No Video Mode
  • 625g. 147 x 95 x 91 mm
  • Weather-sealed Body

Sony A7R III was replaced by Sony Alpha A7R IV. You may also be interested in these comparisons:
Sony Alpha A7R IV vs Sony Alpha A7R III
Sony Alpha A7R IV vs Sigma sd Quattro

Let's read on in the following sections in order to better understand in detail how the Sony A7R III and Sigma Quattro compare and hopefully end up with enough arguments to decide which one is better for you.


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Sony A7R III Sony A7R III
See at AMAZON
Sigma Quattro Sigma Quattro
See at AMAZON
Sony A7R III
See at AMAZON
Sigma Quattro
See at AMAZON
Reasons to choose Sony Alpha A7R III over Sigma sd Quattro
Wireless Connection
Built-In vs None Better connectivity
In-built Image Stabilization
Sensor-shift vs None Sharper images at longer focal lengths and slow shutter speeds
LCD Screen
Tilting vs Fixed Type Flexible shooting positions
Touch Screen
Yes vs No Easy control of camera functions
Viewfinder Magnif.
0.78x vs 0.73x Larger Viewfinder
Sensor Resolution
42 MP vs 29 MP 44% more pixels
Max ISO
32.000 vs 6.400 400% higher Max ISO
Number of Focus Points
425 vs 9 416 more focus points
Max Mech. Shutter
1/8000s vs 1/4000s faster mechanical shutter
Continuous Shooting
10.0fps vs 3.6fps 6.4 fps faster
Microphone Port
Yes vs No High quality audio recording option
Headphone Port
Yes vs No better video control
Timelapse Recording
Yes vs No creative shooting
Viewfinder Resolution
3686.4k dot vs 2360k dot 56% higher resolution
Sensor Pixel Area
20.43µm2 vs 18.69µm2 9% larger pixel area
Max Video Resolution
3840 x 2160 vs None Higher Resolution Video
AE Bracketing Range
±5 EV vs ±3 EV Wide Bracketing range is useful for HDR
Flash Sync Port
Yes vs No Connect off-camera flash
NFC Connection
Yes vs No Easy wireless connectivity with compatible devices
Pixel Shift High-Res Mode
Yes (169. 6) vs No Increased resolution with pixel shift
Bluetooth
Yes vs No Connect your camera to other devices via Blueetooth
Storage Slot
2 vs 1 Extra storage slot
Smartphone Remote
Yes vs No Remote control your camera with a smartphone
UHS Card Support
UHS-II vs none Read/Write in High Speeds
Animal Eye AF Tracking
Yes vs No Easily lock and track focus on animals
Webcam Function
Yes vs No Use your camera as a Webcam
Anti Flicker
Yes vs No Reduced uneven color and exposure under flickering light
Eye Tracking Focus
Yes vs No Autofocus system locks on the eye and tracks the subject
CHECK A7R III PRICE


Reasons to choose Sigma sd Quattro over Sony Alpha A7R III
LCD Resolution
1.620k dots vs 1.440k dots 12% higher resolution screen
Weight
625 g vs 657 g 32 g lighter
CHECK Quattro PRICE

Common Strengths of Sony Alpha A7R III and Sigma sd Quattro
External Flash Shoe
Yes vs Yes Better for flash photography
Viewfinder
Yes (Electronic) vs Yes (Electronic) Better framing and control
RAW Support
Yes vs Yes Better image quality
Face Detection Focus
Yes vs Yes very handy for portraits
Max Resolution
42 MP vs 29 MP Bigger prints and more details
LCD Screen Resolution
1.440k dots vs 1.620k dots High resolution screens
Environmental Sealing
Yes vs Yes shoot at tough conditions
AE Bracketing
Yes vs Yes Useful for tough lighting conditions and HDR
Common Weaknesses of Sony Alpha A7R III and Sigma sd Quattro
Built-in Flash
No vs No Require external flash
New4
Sony A7R III vs Sigma Quattro: Physical Specs and Body Features Comparison

Size and weight are big decision factors when you are trying to find the ideal camera for your needs. In this section, we are going to illustrate the Sony A7R III and Sigma Quattro side-by-side from the front, back and top in their relative dimensions. Sony A7R III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 657 g (1.45 lb / 23.17 oz) (including batteries). Sigma Quattro has external dimensions of 147 x 95 x 91 mm (5.79 x 3.74 x 3.58″) and weighs 625 g (1.38 lb / 22.05 oz) (including batteries).

Below you can see the front-view size comparison of the Sony A7R III and the Sigma Quattro. Sony A7R III is 20mm narrower and 17mm thinner than Sigma Quattro but it is also 1mm taller.

Sony A7R III vs Sigma Quattro Camera Size Comparison - Front View
Comparison image of the Sony A7R III and the Sigma Quattro Size, Weight and External Dimensions - Front View

Here is the back view size comparison of the Sony A7R III and Sigma Quattro.

Sony A7R III vs Sigma Quattro Camera Size Comparison - Back View
Comparison image of the Sony A7R III and the Sigma Quattro Size and Weight - Back View

Now lets look at the top view comparison of Sony A7R III and Sigma Quattro.
Sony A7R III vs Sigma Quattro Camera Size Comparison - Top View
Top View Comparison image of the Sony A7R III and the Sigma Quattro Size

Weight is another important factor, especially when deciding on a camera that you want to carry with you all day. Sigma Quattro is 32g lighter than the Sony A7R III but we don't think this will make a significant difference.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since Sony A7R III has a Full frame sensor and Sigma Quattro has a smaller APS-C sensor, Sigma Quattro's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7R III lenses.

Weight Comparison

Mirrorless Cameras

A7R III
Quattro
Min
Average
Max
Thickness Comparison

Mirrorless Cameras

A7R III
Quattro
Min
Average
Max

Weather Sealing

Both the A7R III and the Quattro have weather sealings in their bodies, making them resistant to water and dust.

LCD Screen Size and Features

Sony A7R III and Sigma Quattro's LCD screens have the same diagonal size of 3.00 inches.

On the other hand, Sony A7R III features a Tilting screen where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels whereas the Sigma Quattro has a fixed type screen which provides less flexibility in shooting positions compared to A7R III.


Sony A7R III vs Sigma Quattro: Sensor Comparison

Sony A7R III has a 42.0MP Full frame (35.9 x 24 mm ) sized BSI-CMOS sensor and features Bionz X processor. On the other hand, Sigma Quattro has a 29.0MP APS-C (23.5 x 15.6 mm ) sized CMOS (Foveon X3) sensor and features Dual TRUE III processor.

Sony A7R III's sensor provides 13MP more than Sigma Quattro's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely. On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.

Another similarity between these two cameras is that both Sigma Quattro and Sony A7R III sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.

Below you can see the A7R III and Quattro sensor size comparison.

Sony A7R III vs Sigma Quattro Sensor Size Comparison
Sensor Size and Resolution Comparison image of Sony A7R III and Sigma Quattro Cameras


As seen above, Sony A7R III has a 2.4x Larger sensor area than Sigma Quattro. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

Sony A7R III vs Sigma Quattro Comparison of Available Lenses
Which camera has more lenses?

The number of available lenses is a big deciding factor when choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that the Sony A7R III has an advantage over the Sigma Quattro. There are 205 lenses for the Sony A7R III's Sony E mount, but on the other hand, there are only 77 lenses for the Sigma Quattro's Sigma SA Bayonet lens mount.

Another important factor is the availability of image stabilization. Sony A7R III has a big advantage in this regard because it has a sensor based image stabilization (IS) which means that all the lenses mounted to this body will be stabilized. A7R III's built-in Image stabilization system is effective for compensating vibration up to 5.0-stops according to CIPA standards.
On the other hand, Sigma Quattro doesn't have this feature so you have to buy a lens with optical stabilization feature. Currently there are 29 lenses for Sigma SA Bayonet mount with Optical Image Stabilization features.

Lens Type # of Sony A7R III Lenses # of Sigma Quattro Lenses
Standard Zoom 19 (14 Full Frame) 9
Standard Prime 34 (21 Full Frame) 5
Wideangle Zoom 17 (12 Full Frame) 8
Wideangle Prime 61 (42 Full Frame) 8
Telephoto Zoom 21 (19 Full Frame) 19
Telephoto Prime 29 (22 Full Frame) 8
SuperZoom 10 (2 Full Frame) 9
Wideangle Fisheye Prime 2 (0 Full Frame) 4
Macro Prime 9 (8 Full Frame) 7
Perspective Control Prime 2 (2 Full Frame) n/a
Telephoto Mirror Prime n/a n/a
TOTAL 205 (142 Full Frame) 77

What types of Photography are Sony A7R III and Sigma Quattro Good for?
In this section, we rank and compare Sony A7R III and Sigma Quattro for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Sony A7R III for Portrait Photography

GOOD

Sigma Quattro for Portrait Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Read the details

Check the Best Sony E Mount Lenses for Portrait Photography
Large APS-C (23.5 x 15.6 mm) sensor
Very High Resolution Sensor: 29.0MP
Electronic Built-in Viewfinder
Average Ergonomics&Handling
No Image Stabilization
Read the details

Check the Best Sigma SA Mount Lenses for Portrait Photography

Sony A7R III for Street Photography

EXCELLENT

Sigma Quattro for Street Photography

GOOD
Large Full frame (35.9 x 24 mm) sensor
Image Stabilization
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Tilting LCD Screen
Medium sized Body
Read the details

Check the Best Sony E Mount Lenses for Street Photography
Large APS-C (23.5 x 15.6 mm) sensor
Electronic Built-in Viewfinder
Live-view
Face-Detection Focusing
Medium sized Body
No Image Stabilization
Read the details

Check the Best Sigma SA Mount Lenses for Street Photography

Sony A7R III for Sports Photography

GOOD

Sigma Quattro for Sports Photography

AVERAGE
Image Stabilization
Electronic Built-in Viewfinder
Good Ergonomics&Handling
Fast Continuous Shooting: 10.0fps
Anti Flicker feature
Environmental Sealings
Fast Max shutter speed: 1/8000s
425 Focus Points
Good Battery Life: 650 shots
Good Low Light ISO
Wireless Connection
Read the details

Check the Best Sony E Mount Lenses for Sports Photography
Electronic Built-in Viewfinder
Environmental Sealings
Fast Max shutter speed: 1/4000s
Average Ergonomics&Handling
Average Continuous Shooting: 3.6fps
No Image Stabilization
Slow Continuous Shooting: 3.6fps
9 Focus Points
Read the details

Check the Best Sigma SA Mount Lenses for Sports Photography

Sony A7R III for Daily Photography

EXCELLENT

Sigma Quattro for Daily Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Anti Flicker feature
Environmental Sealings
Medium size Body
657g
Body Thickness 74mm
Read the details
Large APS-C (23.5 x 15.6 mm) sensor
Environmental Sealings
Medium size Body
625g
Body Thickness 91mm
Read the details

Sony A7R III for Landscape Photography

GOOD

Sigma Quattro for Landscape Photography

AVERAGE
Large Full frame (35.9 x 24 mm) sensor
Very High Resolution Sensor: 42.0MP
Environmental Sealings
Live-view
Read the details

Check the Best Sony E Mount Lenses for Landscape Photography
Large APS-C (23.5 x 15.6 mm) sensor
Very High Resolution Sensor: 29.0MP
Environmental Sealings
Live-view
Read the details

Check the Best Sigma SA Mount Lenses for Landscape Photography

Sony A7R III vs Sigma Quattro: OUR DECISION

You may have already made your decision about which camera suits better for your needs and your budget so far, but in case you wonder how we rated Sony A7R III and Sigma Quattro, below you can find their scores in five different aspects. Our Decision Algorithm dynamically scores cameras using 69 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Sony A7R III and Sigma Quattro scores compare:

Sony A7R III
Imaging
Features
Value
Portability
Overall
Ranked #10 out of 118 in SLR-style mirrorless cameras
Ranked #12 out of 1276 in all Cameras
Sigma Quattro
Imaging
Features
Value
Portability
Overall
Ranked #120 out of 140 in Rangefinder-style mirrorless cameras
Ranked #498 out of 1276 in all Cameras

Sony A7R III is the clear winner of this comparison. It has a higher Overall Score and beats Sigma Quattro in all criteria. It has better general image quality, more features, more compact body and offers more value for the money

Sony A7R III
Sony A7R III
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Sigma Quattro
Sigma Quattro
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Sigma Quattro vs Sony A7R III Specs Table
Detailed comparison of specifications
General Sony Alpha A7R III Sigma sd Quattro
Brand Sony Sigma
Announced 2017-10-25 2016-02-23
Body Type SLR-style mirrorless Rangefinder-style mirrorless
Sensor
Type BSI-CMOS CMOS (Foveon X3)
Size Full frame APS-C
Dimensions 35.9 x 24 mm 23.5 x 15.6 mm
Area 861.60mm2 366.60mm2
Megapixels 42 megapixels 29 megapixels
Max Resolution 7952 x 5304 5424 x 3616
Max Native Light sensitivity 32,000 ISO 6,400 ISO
Max Boosted Light Sensitivity 102400 ISO -
Min Native Light sensitivity 100 ISO 100 ISO
Min Boosted Light Sensitivity 50 ISO -
RAW Support
Autofocus
AF Touch
AF Continuous
AF Single
AF Tracking
AF Selective
AF Center
AF Multi Area
AF Live View
AF Face Detection
AF Contrast Detection
AF Phase Detection
Number of Focus Points 425 9
Lens
Manual Focus
Lens Mount Sony E Sigma SA Bayonet
Number of Available Lenses 205 77
Screen
Type Tilting Fixed type
Size 3.00" 3.00"
Resolution 1,440k dots 1,620k dots
Touch Screen
Viewfinder
Viewfinder Electronic Electronic
Viewfinder Resolution 3,686k dots 2,360k dots
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.78x 0.73x
Photography Features
Max Mechanical Shutter 1/8000s 1/4000s
Shutter Priority
Aperture Priority
Manual Exposure Mode
Custom White Balance
Built-in Image Stabilization Sensor-shift No
Built-in Flash
External Flash
Continuous Shooting 10.0 fps 3.6 fps
Multi-Segment Metering
Average Metering
Spot Metering
Partial Metering
AF-Area Metering
Center Weighted Metering
AE Bracketing
WB Bracketing
Video Features
Max Video Resolution 3840 x 2160 None
Video Formats MPEG-4, AVCHD, XAVC S n/a
Microphone Port
Headphone Port
Connectivity
Wireless Connectivity Built-In None
HDMI
Physical
Environmental Sealing
Weight 657g 625g
Dimensions 127 x 96 x 74mm 147 x 95 x 91mm
Battery Life 650 shots n/a
Other Features
Timelapse Recording
GPS None None
DxO Sensor Scores
DxO Overall Score 100 not tested
DxO Color Depth 26.0 not tested
DxO Dynamic Range 14.7 not tested
DxO Low Light ISO 3523 not tested
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