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Sony A7S III vs Sony FX3

Portability
61
Imaging
64
Features
92
Overall
75
Sony Alpha A7S III front
 
Sony FX3 front
Portability
62
Imaging
65
Features
92
Overall
75

Sony A7S III vs Sony FX3 Key Specs

Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Display
  • ISO 80 - 102400 (Push to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 699g - 129 x 97 x 81mm
  • Announced July 2020
  • Superseded the Sony A7S II
Sony FX3
(Full Review)
  • 12MP - Full frame Sensor
  • 3.00" Fully Articulated Display
  • ISO 80 - 102400 (Bump to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 716g - 130 x 78 x 85mm
  • Released February 2021
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Sony A7S III vs Sony FX3 Overview

Lets look much closer at the Sony A7S III vs Sony FX3, both Pro Mirrorless digital cameras and they are both sold by Sony. The resolution of the A7S III (12MP) and the FX3 (12MP) is very similar and both cameras offer the identical sensor sizes (Full frame).

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The A7S III was revealed 7 months earlier than the FX3 so they are of a similar age. Both of these cameras feature different body design with the Sony A7S III being a SLR-style mirrorless camera and the Sony FX3 being a Rangefinder-style mirrorless camera.

Before we go into a step-by-step comparison, here is a brief view of how the A7S III matches up vs the FX3 when it comes to portability, imaging, features and an overall score.

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Reasons to pick Sony A7S III over the Sony FX3

 A7S III FX3 

Reasons to pick Sony FX3 over the Sony A7S III

 FX3 A7S III 
ReleasedFebruary 2021July 2020More modern by 7 months

Common features in the Sony A7S III and Sony FX3

 A7S III FX3 
Focus manually More accurate focus
Display typeFully articulatedFully articulatedFully Articulated display
Display size3"3.00"Same display dimensions
Display resolution1440k1440kIdentical display resolution
Selfie screen Both are selfie friendly
Touch display Easily navigate

Sony A7S III vs Sony FX3 Physical Comparison

When you are planning to carry around your camera regularly, you have to factor its weight and size. The Sony A7S III features outside dimensions of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") along with a weight of 699 grams (1.54 lbs) whilst the Sony FX3 has specifications of 130mm x 78mm x 85mm (5.1" x 3.1" x 3.3") with a weight of 716 grams (1.58 lbs).

Analyze the Sony A7S III vs Sony FX3 in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an ILC will differ based on the lens you have chosen at the time. Below is a front view measurement comparison of the A7S III against the FX3.

Sony A7S III vs Sony FX3 size comparison

Using size and weight, the portability rating of the A7S III and FX3 is 61 and 62 respectively.

Sony A7S III vs Sony FX3 top view buttons comparison

Sony A7S III vs Sony FX3 Sensor Comparison

Often, it is very tough to imagine the difference between sensor sizes simply by reviewing specifications. The pic here will help give you a clearer sense of the sensor dimensions in the A7S III and FX3.

Plainly, each of these cameras feature the identical sensor size and the exact same resolution so you can expect similar quality of pictures although you will want to take the age of the products into consideration. The more aged A7S III is going to be disadvantaged when it comes to sensor tech.

Sony A7S III vs Sony FX3 sensor size comparison

Sony A7S III vs Sony FX3 Screen and ViewFinder

Sony A7S III vs Sony FX3 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Sony A7S III Portrait photography highlights
Sony FX3 Portrait photography highlights
70
you can focus manually
large sensor size (Full frame)
supports face detection focusing
delivers RAW formats
low MP (12 megapixels)
71
has manual focus
large sensor size (Full frame)
provides face detection focus
exports RAW files
MP count low (12MP)
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Street Comparison

Sony A7S III Street photography info
Sony FX3 Street photography info
76
image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
delivers RAW formats
features touch to focus
weather proof
above average ISO range (102,400)
76
built in image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
exports RAW files
offers focus by touch
weather proofing
good high ISO (102,400)
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Sports Comparison

Sony A7S III Sports photography info
Sony FX3 Sports photography info
75
great max shutter speed (1/8,000s)
image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
supports tracking autofocus
weather proof
great battery life (600 CIPA)
supports phase detect AF
low MP (12 megapixels)
76
max shutter speed is good (1/8,000s)
built in image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
provides tracking autofocus
weather proofing
great battery power (600 shots)
sensor has phase detect auto focus
MP count low (12 megapixels)
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Travel Comparison

Sony A7S III Travel photography details
Sony FX3 Travel photography details
70
great battery life (600 per charge)
weather proof
has bluetooth
features touch to focus
display is selfie friendly
low MP (12MP)
71
great battery power (600 per charge)
weather proofing
has bluetooth
offers focus by touch
display is selfie friendly
MP count low (12MP)
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Landscape Comparison

Sony A7S III as a Landscape photography camera
Sony FX3 as a Landscape photography camera
77
you can focus manually
interchangeable lenses (Sony E mount)
screen size is good (3")
image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
above average ISO range (102,400)
delivers RAW formats
weather proof
great battery life (600 shots)
two card slots
low MP (12MP)
77
has manual focus
switch lenses (Sony E mount)
screen size is good (3.00 inches)
built in image stabilization (Sensor based 5-axis)
large sensor size (Full frame)
good high ISO (102,400)
exports RAW files
weather proofing
great battery power (600 shots)
has dual storage slots
MP count low (12 megapixels)
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Vlogging Comparison

Sony A7S III Vlogging info
Sony FX3 Vlogging info
77
display is selfie friendly
touchscreen capability
image stabilization (Sensor based 5-axis)
supports face detection focusing
great video quality (3840 x 2160 resolution)
comes with external microphone socket
77
display is selfie friendly
has touchscreen
built in image stabilization (Sensor based 5-axis)
provides face detection focus
high video quality (3840 x 2160 pixels)
includes external microphone jack
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Sony A7S III vs Sony FX3 Specifications

Detailed spec comparison table for Sony A7S III and Sony FX3
 Sony Alpha A7S IIISony FX3
General Information
Brand Sony Sony
Model Sony Alpha A7S III Sony FX3
Category Pro Mirrorless Pro Mirrorless
Announced 2020-07-21 2021-02-23
Body design SLR-style mirrorless Rangefinder-style mirrorless
Sensor Information
Powered by Bionz XR -
Sensor type BSI-CMOS BSI-CMOS
Sensor size Full frame Full frame
Sensor measurements 35.6 x 23.8mm 35.6 x 23.8mm
Sensor area 847.3mm² 847.3mm²
Sensor resolution 12MP 12MP
Anti aliasing filter
Aspect ratio 3:2 and 16:9 3:2 and 16:9
Maximum resolution 4240 x 2832 4240 x 2832
Maximum native ISO 102400 102400
Maximum boosted ISO 409600 409600
Lowest native ISO 80 80
RAW support
Lowest boosted ISO 50 50
Autofocusing
Manual focus
Touch focus
Continuous AF
AF single
Tracking AF
Selective AF
AF center weighted
AF multi area
AF live view
Face detect AF
Contract detect AF
Phase detect AF
Number of focus points 759 759
Lens
Lens mounting type Sony E Sony E
Number of lenses 121 187
Crop factor 1 1
Screen
Display type Fully articulated Fully articulated
Display size 3 inches 3.00 inches
Resolution of display 1,440k dot 1,440k dot
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder Electronic None
Viewfinder resolution 9,440k dot -
Viewfinder coverage 100 percent -
Viewfinder magnification 0.91x -
Features
Lowest shutter speed 30s 30s
Highest shutter speed 1/8000s 1/8000s
Continuous shooting speed 10.0fps 10.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set WB
Image stabilization
Integrated flash
Flash range no built-in flash no built-in flash
Flash settings no built-in flash no built-in flash
External flash
AE bracketing
White balance bracketing
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions 3840 x 2160 @ 120p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 100p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 60p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 50p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 30p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 25p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 24p / 100 Mbps, XAVC S, MP4, H.265, Linear PCM 1920 x 1080 @ 120p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 100p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 60p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 50p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 25p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 24p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 3840 x 2160 @ 120p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 100p / 280 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 60p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 50p / 200 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 30p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 25p / 140 Mbps, XAVC S, MP4, H.265, Linear PCM 3840 x 2160 @ 24p / 100 Mbps, XAVC S, MP4, H.265, Linear PCM 1920 x 1080 @ 120p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 100p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 60p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 50p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 25p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM 1920 x 1080 @ 24p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
Maximum video resolution 3840x2160 3840x2160
Video format MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265 MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265
Microphone input
Headphone input
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 3.2 Gen 1 (5 GBit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 699g (1.54 lb) 716g (1.58 lb)
Physical dimensions 129 x 97 x 81mm (5.1" x 3.8" x 3.2") 130 x 78 x 85mm (5.1" x 3.1" x 3.3")
DXO scores
DXO All around score 85 85
DXO Color Depth score 23.6 24.2
DXO Dynamic range score 13.3 13.4
DXO Low light score 2993 3900
Other
Battery life 600 pictures 600 pictures
Style of battery Battery Pack Battery Pack
Battery model NP-FZ100 NP-FZ100
Self timer Yes (2 or 10 sec; continuous (3 or 5 exposures)) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting With downloadable app With downloadable app
Type of storage Dual SD/CFexpress Type A slots Dual SD/CFexpress Type A slots
Storage slots Dual Dual
Pricing at launch $3,499 $3,900