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Sony A7R III vs Sony RX100

Portability
63
Imaging
78
Features
93
Overall
84
Sony Alpha A7R III front
 
Sony Cyber-shot DSC-RX100 front
Portability
91
Imaging
50
Features
68
Overall
57

Sony A7R III vs Sony RX100 Key Specs

Sony A7R III
(Full Review)
  • 42MP - Full frame Sensor
  • 3" Tilting Display
  • ISO 100 - 32000 (Push to 102400)
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 657g - 127 x 96 x 74mm
  • Announced October 2017
  • Superseded the Sony A7R II
  • Later Model is Sony A7R IV
Sony RX100
(Full Review)
  • 20MP - 1" Sensor
  • 3" Fixed Display
  • ISO 100 - 25600
  • Optical Image Stabilization
  • 1920 x 1080 video
  • 28-100mm (F1.8-4.9) lens
  • 240g - 102 x 58 x 36mm
  • Revealed August 2012
  • Later Model is Sony RX100 II
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Sony A7R III vs Sony RX100 Overview

On this page, we are matching up the Sony A7R III and Sony RX100, one is a Pro Mirrorless and the other is a Large Sensor Compact and they are both designed by Sony. There is a huge difference among the resolutions of the A7R III (42MP) and RX100 (20MP) and the A7R III (Full frame) and RX100 (1") provide totally different sensor sizes.

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The A7R III was announced 5 years after the RX100 which is a fairly significant gap as far as camera tech is concerned. Both cameras have different body design with the Sony A7R III being a SLR-style mirrorless camera and the Sony RX100 being a Large Sensor Compact camera.

Before going straight to a detailed comparison, here is a brief highlight of how the A7R III grades versus the RX100 in relation to portability, imaging, features and an overall score.

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Reasons to pick Sony A7R III over the Sony RX100

 A7R III RX100 
RevealedOctober 2017August 2012More modern by 63 months
Display typeTiltingFixed Tilting display
Display resolution1440k1229kClearer display (+211k dot)
Touch friendly display Easily navigate

Reasons to pick Sony RX100 over the Sony A7R III

 RX100 A7R III 

Common features in the Sony A7R III and Sony RX100

 A7R III RX100 
Manually focus Very precise focus
Display dimensions3"3"Equal display dimensions
Selfie screen Neither includes selfie screen

Sony A7R III vs Sony RX100 Physical Comparison

When you are planning to carry around your camera often, you should think about its weight and size. The Sony A7R III features outer measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs) whilst the Sony RX100 has specifications of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") with a weight of 240 grams (0.53 lbs).

Check the Sony A7R III and Sony RX100 in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will vary depending on the lens you are utilizing at that time. The following is a front view over all size comparison of the A7R III versus the RX100.

Sony A7R III vs Sony RX100 size comparison

Using size and weight, the portability grade of the A7R III and RX100 is 63 and 91 respectively.

Sony A7R III vs Sony RX100 top view buttons comparison

Sony A7R III vs Sony RX100 Sensor Comparison

Generally, its hard to see the gap in sensor sizes simply by going through specs. The pic here might provide you a much better sense of the sensor measurements in the A7R III and RX100.

All in all, each of these cameras have different megapixel count and different sensor sizes. The A7R III using its larger sensor will make achieving bokeh simpler and the Sony A7R III will produce greater detail with its extra 22 Megapixels. Greater resolution will also make it easier to crop pics a bit more aggressively. The fresher A7R III will have an edge when it comes to sensor innovation.

Sony A7R III vs Sony RX100 sensor size comparison

Sony A7R III vs Sony RX100 Screen and ViewFinder

Sony A7R III vs Sony RX100 Screen and Viewfinder comparison
Photography Glossary

Photography Type Scores

Portrait Comparison

Sony A7R III Portrait photography features
Sony RX100 Portrait photography features
86
manual focus
MP count amazing (42MP)
great sensor size (Full frame)
supports face detection focusing
exports RAW formats
64
focusing manually
flash sync is higher than normal (1/2,000s)
good megapixels (20MP)
nice sensor size (1")
offers face detect focus
exports RAW files
external flash not possible
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Street Comparison

Street photography with Sony A7R III
Street photography with Sony RX100
79
screen tilts up and down
image stabilization (Sensor based 5-axis)
great sensor size (Full frame)
exports RAW formats
includes touch to focus
weather proofing
good ISO range (32,000)
79
image stabilization (Optical)
nice sensor size (1")
exports RAW files
lighter than others in class (240g)
very good high ISO (25,600)
screen is fixed
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Sports Comparison

Sony A7R III as a Sports photography camera
Sony RX100 as a Sports photography camera
89
maximum shutter speed is high (1/8,000s)
image stabilization (Sensor based 5-axis)
MP count amazing (42MP)
great sensor size (Full frame)
supports tracking autofocus
weather proofing
great battery power (650 shots)
has phase detect AF
65
image stabilization (Optical)
good megapixels (20MP)
nice sensor size (1")
offers tracking focus
lack of phase detect auto focus
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Travel Comparison

Travel photography with Sony A7R III
Travel photography with Sony RX100
74
great battery power (650 per charge)
weather proofing
connects via bluetooth
includes touch to focus
MP count amazing (42MP)
doesn't feature selfie friendly screen
79
lighter than others in class (240g)
good megapixels (20 megapixels)
has built in flash
decently wide (28mm)
very good max aperture (f1.8)
display isn't selfie friendly
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Landscape Comparison

Sony A7R III Landscape photography factors
Sony RX100 Landscape photography factors
87
manual focus
change lenses (Sony E mount)
nice screen size (3 inches)
image stabilization (Sensor based 5-axis)
MP count amazing (42MP)
great sensor size (Full frame)
no anti-alias filter
good ISO range (32,000)
exports RAW formats
weather proofing
great battery power (650 CIPA)
has dual storage slots
74
focusing manually
decently wide (28mm)
very good max aperture (f1.8)
good sized screen (3 inch)
image stabilization (Optical)
good megapixels (20 megapixels)
nice sensor size (1")
very good high ISO (25,600)
exports RAW files
fixed lens (fixed lens mount)
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Vlogging Comparison

Sony A7R III Vlogging advice
Sony RX100 Vlogging advice
37
touch screen
image stabilization (Sensor based 5-axis)
supports face detection focusing
high quality video (3840 x 2160 pxls)
has external microphone jack
doesn't feature selfie friendly screen
38
decently wide (28mm)
very good max aperture (f1.8)
image stabilization (Optical)
offers face detect focus
high res video (1920 x 1080 pxls)
lighter than others in class (240g)
display isn't selfie friendly
does not have microphone port
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Sony A7R III vs Sony RX100 Specifications

Detailed spec comparison table for Sony A7R III and Sony RX100
 Sony Alpha A7R IIISony Cyber-shot DSC-RX100
General Information
Company Sony Sony
Model Sony Alpha A7R III Sony Cyber-shot DSC-RX100
Class Pro Mirrorless Large Sensor Compact
Announced 2017-10-25 2012-08-28
Body design SLR-style mirrorless Large Sensor Compact
Sensor Information
Processor Bionz X -
Sensor type BSI-CMOS CMOS
Sensor size Full frame 1"
Sensor measurements 35.9 x 24mm 13.2 x 8.8mm
Sensor area 861.6mm² 116.2mm²
Sensor resolution 42 megapixel 20 megapixel
Anti aliasing filter
Aspect ratio 3:2 and 16:9 1:1, 4:3, 3:2 and 16:9
Highest resolution 7952 x 5304 5472 x 3648
Highest native ISO 32000 25600
Highest boosted ISO 102400 -
Minimum native ISO 100 100
RAW images
Minimum boosted ISO 50 -
Autofocusing
Manual focus
Touch to focus
AF continuous
Single AF
AF tracking
Selective AF
Center weighted AF
Multi area AF
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 425 25
Lens
Lens mounting type Sony E fixed lens
Lens focal range - 28-100mm (3.6x)
Largest aperture - f/1.8-4.9
Macro focus distance - 5cm
Available lenses 121 -
Focal length multiplier 1 2.7
Screen
Range of display Tilting Fixed Type
Display diagonal 3 inch 3 inch
Display resolution 1,440k dot 1,229k dot
Selfie friendly
Liveview
Touch display
Display tech - WhiteMagic TFT LCD
Viewfinder Information
Viewfinder type Electronic None
Viewfinder resolution 3,686k dot -
Viewfinder coverage 100 percent -
Viewfinder magnification 0.78x -
Features
Lowest shutter speed 30s 30s
Highest shutter speed 1/8000s 1/2000s
Continuous shooting speed 10.0 frames/s 10.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Custom WB
Image stabilization
Inbuilt flash
Flash range no built-in flash -
Flash settings Off, Auto, Fill-flash, Slow Sync, Rear Sync, Red-eye reduction, Wireless, Hi-speed sync Auto, On, Off, Slow Sync
External flash
Auto exposure bracketing
WB bracketing
Highest flash sync - 1/2000s
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions 3840 x 2160 (30p, 25p, 24p), 1920 x 1080 (60p, 60i, 24p), 1440 x 1080 (30p), 640 x 480 (30p) 1920 x 1080 (60 fps), 1440 x 1080 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps)
Highest video resolution 3840x2160 1920x1080
Video format MPEG-4, AVCHD, XAVC S MPEG-4, AVCHD
Microphone jack
Headphone jack
Connectivity
Wireless Built-In Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 3.1 Gen 1(5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 657 grams (1.45 lb) 240 grams (0.53 lb)
Physical dimensions 127 x 96 x 74mm (5.0" x 3.8" x 2.9") 102 x 58 x 36mm (4.0" x 2.3" x 1.4")
DXO scores
DXO All around score 100 66
DXO Color Depth score 26.0 22.6
DXO Dynamic range score 14.7 12.4
DXO Low light score 3523 390
Other
Battery life 650 shots 330 shots
Form of battery Battery Pack Battery Pack
Battery model NP-FZ100 NP-BX1
Self timer Yes (2 or 10 sec; continuous (3 or 5 exposures)) Yes (2 or 10 sec, Portrait 1/2)
Time lapse feature With downloadable app
Storage media Two SD/SDHC/SDXC slots (UHS-II support on one) SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Storage slots Two One
Retail price $2,800 $448