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Canon SX420 IS vs Sony A7S III

Portability
80
Imaging
46
Features
34
Overall
41
Canon PowerShot SX420 IS front
 
Sony Alpha A7S III front
Portability
61
Imaging
64
Features
92
Overall
75

Canon SX420 IS vs Sony A7S III Key Specs

Canon SX420 IS
(Full Review)
  • 20MP - 1/2.3" Sensor
  • 3" Fixed Screen
  • ISO 100 - 1600
  • Optical Image Stabilization
  • 1280 x 720 video
  • 24-1008mm (F3.5-6.6) lens
  • 325g - 104 x 69 x 85mm
  • Revealed January 2016
Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Display
  • ISO 80 - 102400 (Boost to 409600)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 699g - 129 x 97 x 81mm
  • Introduced July 2020
  • Earlier Model is Sony A7S II
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Canon SX420 IS vs Sony A7S III Overview

On this page, we are reviewing the Canon SX420 IS and Sony A7S III, former being a Small Sensor Superzoom while the other is a Pro Mirrorless by manufacturers Canon and Sony. There is a large difference among the resolutions of the SX420 IS (20MP) and A7S III (12MP) and the SX420 IS (1/2.3") and A7S III (Full frame) offer different sensor measurements.

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The SX420 IS was launched 5 years before the A7S III and that is a fairly serious difference as far as camera tech is concerned. Each of these cameras have different body design with the Canon SX420 IS being a SLR-like (bridge) camera and the Sony A7S III being a SLR-style mirrorless camera.

Before going straight to a comprehensive comparison, here is a simple overview of how the SX420 IS grades against the A7S III in the way of portability, imaging, features and an overall grade.

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Reasons to pick Canon SX420 IS over the Sony A7S III

 SX420 IS A7S III 

Reasons to pick Sony A7S III over the Canon SX420 IS

 A7S III SX420 IS 
IntroducedJuly 2020January 2016More recent by 55 months
Display typeFully articulatedFixed Fully Articulating display
Display resolution1440k230kCrisper display (+1210k dot)
Selfie screen Take selfies
Touch friendly display Easily navigate

Common features in the Canon SX420 IS and Sony A7S III

 SX420 IS A7S III 
Focus manually Dial exact focusing
Display dimensions3"3"Equal display measurements

Canon SX420 IS vs Sony A7S III Physical Comparison

For anybody who is aiming to lug around your camera often, you'll need to think about its weight and dimensions. The Canon SX420 IS enjoys outside measurements of 104mm x 69mm x 85mm (4.1" x 2.7" x 3.3") and a weight of 325 grams (0.72 lbs) whilst the Sony A7S III has 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).

Take a look at the Canon SX420 IS and Sony A7S III in our completely new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an ILC will vary dependant on the lens you have at that moment. The following is a front view overall size comparison of the SX420 IS vs the A7S III.

Canon SX420 IS vs Sony A7S III size comparison

Looking at size and weight, the portability score of the SX420 IS and A7S III is 80 and 61 respectively.

Canon SX420 IS vs Sony A7S III top view buttons comparison

Canon SX420 IS vs Sony A7S III Sensor Comparison

Usually, its difficult to picture the contrast in sensor measurements merely by seeing a spec sheet. The photograph underneath should give you a stronger sense of the sensor sizing in the SX420 IS and A7S III.

As you can see, both cameras provide different resolutions and different sensor measurements. The SX420 IS featuring a smaller sensor is going to make getting shallower depth of field trickier and the Canon SX420 IS will show more detail utilizing its extra 8MP. Greater resolution can also let you crop photos more aggressively. The older SX420 IS will be disadvantaged when it comes to sensor innovation.

Canon SX420 IS vs Sony A7S III sensor size comparison

Canon SX420 IS vs Sony A7S III Screen and ViewFinder

Canon SX420 IS vs Sony A7S III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Canon SX420 IS as a Portrait photography camera
Sony A7S III as a Portrait photography camera
44
manual focus
megapixel count good (20MP)
includes face detect focusing
no manual mode
cannot use external flash
sensor is small (1/2.3")
lack of RAW support
70
you can focus manually
sensor size is big (Full frame)
has face detect focusing
exports RAW formats
sensor resolution low (12 megapixels)
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Street Comparison

Canon SX420 IS as a Street photography camera
Sony A7S III as a Street photography camera
52
has image stabilization (Optical)
screen is fixed
sensor is small (1/2.3")
lack of RAW support
76
image stabilization (Sensor based 5-axis)
sensor size is big (Full frame)
exports RAW formats
supports touch focus
weather proofing
very good ISO range (102,400)
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Sports Comparison

Canon SX420 IS Sports photography info
Sony A7S III Sports photography info
41
incredible zoom range (24-1008mm 42.0 x zoom)
has image stabilization (Optical)
megapixel count good (20 megapixels)
low fps (0.5 fps)
no shutter priority mode
sensor is small (1/2.3")
not so great battery power (195 per charge)
lack of phase detect AF
75
maximum shutter speed is high (1/8,000s)
image stabilization (Sensor based 5-axis)
sensor size is big (Full frame)
has tracking focus
weather proofing
good battery power (600 shots)
supports phase detect AF
sensor resolution low (12MP)
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Travel Comparison

Canon SX420 IS Travel photography features
Sony A7S III Travel photography features
61
megapixel count good (20 megapixels)
has built in flash
fairly wide (24mm)
long reach (1008mm)
doesn't have Timelapse function
not so great battery power (195 CIPA)
doesn't have a selfie friendly display
slow maximum aperture (f3.5)
70
good battery power (600 per charge)
weather proofing
supports bluetooth
supports touch focus
screen is selfie friendly
sensor resolution low (12MP)
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Landscape Comparison

Canon SX420 IS as a Landscape photography camera
Sony A7S III as a Landscape photography camera
47
manual focus
fairly wide (24mm)
good sized screen (3 inch)
has image stabilization (Optical)
megapixel count good (20MP)
can't swap lens (fixed lens mount)
slow maximum aperture (f3.5)
no manual mode
sensor is small (1/2.3")
lack of RAW support
not so great battery power (195 CIPA)
doesn't have Timelapse function
77
you can focus manually
swap lenses (Sony E mount)
screen size is decent (3 inches)
image stabilization (Sensor based 5-axis)
sensor size is big (Full frame)
very good ISO range (102,400)
exports RAW formats
weather proofing
good battery power (600 shots)
has double storage slots
sensor resolution low (12MP)
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Vlogging Comparison

Canon SX420 IS as a Vlogging camera
Sony A7S III as a Vlogging camera
29
fairly wide (24mm)
has image stabilization (Optical)
includes face detect focusing
slow maximum aperture (f3.5)
doesn't have a selfie friendly display
low quality video (1280 x 720 pixels)
doesn't have microphone socket
77
screen is selfie friendly
screen is touchscreen
image stabilization (Sensor based 5-axis)
has face detect focusing
high res video (3840 x 2160 pxls)
comes with mic port
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Canon SX420 IS vs Sony A7S III Specifications

Detailed spec comparison table for Canon SX420 IS and Sony A7S III
 Canon PowerShot SX420 ISSony Alpha A7S III
General Information
Manufacturer Canon Sony
Model type Canon PowerShot SX420 IS Sony Alpha A7S III
Category Small Sensor Superzoom Pro Mirrorless
Revealed 2016-01-05 2020-07-21
Body design SLR-like (bridge) SLR-style mirrorless
Sensor Information
Processor DIGIC 4+ Bionz XR
Sensor type CCD BSI-CMOS
Sensor size 1/2.3" Full frame
Sensor dimensions 6.17 x 4.55mm 35.6 x 23.8mm
Sensor surface area 28.1mm² 847.3mm²
Sensor resolution 20MP 12MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Highest resolution 5152 x 3864 4240 x 2832
Highest native ISO 1600 102400
Highest boosted ISO - 409600
Lowest native ISO 100 80
RAW pictures
Lowest boosted ISO - 50
Autofocusing
Manual focusing
Autofocus touch
Autofocus continuous
Single autofocus
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Multi area autofocus
Live view autofocus
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Total focus points - 759
Lens
Lens support fixed lens Sony E
Lens zoom range 24-1008mm (42.0x) -
Highest aperture f/3.5-6.6 -
Macro focusing range 0cm -
Available lenses - 121
Crop factor 5.8 1
Screen
Range of screen Fixed Type Fully articulated
Screen diagonal 3 inches 3 inches
Screen resolution 230 thousand dot 1,440 thousand dot
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder type None Electronic
Viewfinder resolution - 9,440 thousand dot
Viewfinder coverage - 100%
Viewfinder magnification - 0.91x
Features
Lowest shutter speed 15 seconds 30 seconds
Highest shutter speed 1/4000 seconds 1/8000 seconds
Continuous shooting speed 0.5 frames/s 10.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation - Yes
Custom white balance
Image stabilization
Built-in flash
Flash distance 5.00 m no built-in flash
Flash settings Auto, flash on, slow synchro, flash off no built-in flash
Hot shoe
AEB
WB bracketing
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 1280 x 720 (25p), 640 x 480 (30p) 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
Highest video resolution 1280x720 3840x2160
Video data format MPEG-4, H.264 MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265
Mic jack
Headphone jack
Connectivity
Wireless Built-In Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 325 grams (0.72 lb) 699 grams (1.54 lb)
Physical dimensions 104 x 69 x 85mm (4.1" x 2.7" x 3.3") 129 x 97 x 81mm (5.1" x 3.8" x 3.2")
DXO scores
DXO All around rating not tested 85
DXO Color Depth rating not tested 23.6
DXO Dynamic range rating not tested 13.3
DXO Low light rating not tested 2993
Other
Battery life 195 shots 600 shots
Battery form Battery Pack Battery Pack
Battery ID NB-11LH NP-FZ100
Self timer Yes (2 or 10 secs) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse recording With downloadable app
Storage media SD/SDHC/SDXC Dual SD/CFexpress Type A slots
Storage slots Single 2
Cost at launch $299 $3,499