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Samsung GX-20 vs Sony A7S III

Portability
58
Imaging
54
Features
52
Overall
53
Samsung GX-20 front
 
Sony Alpha A7S III front
Portability
61
Imaging
65
Features
92
Overall
75

Samsung GX-20 vs Sony A7S III Key Specs

Samsung GX-20
(Full Review)
  • 15MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 3200 (Push to 6400)
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 800g - 142 x 101 x 72mm
  • Introduced January 2008
  • Superseded the Samsung GX-10
Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Screen
  • ISO 80 - 102400 (Boost 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
  • Launched July 2020
  • Earlier Model is Sony A7S II
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Samsung GX-20 vs Sony A7S III Overview

Below is a in depth analysis of the Samsung GX-20 and Sony A7S III, one being a Advanced DSLR and the latter is a Pro Mirrorless by rivals Samsung and Sony. There is a huge difference among the sensor resolutions of the GX-20 (15MP) and A7S III (12MP) and the GX-20 (APS-C) and A7S III (Full frame) posses totally different sensor sizing.

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The GX-20 was introduced 13 years before the A7S III and that is a fairly significant gap as far as camera tech is concerned. Both of these cameras feature different body design with the Samsung GX-20 being a Mid-size SLR camera and the Sony A7S III being a SLR-style mirrorless camera.

Before getting right into a thorough comparison, here is a simple introduction of how the GX-20 scores versus the A7S III with regards to portability, imaging, features and an overall grade.

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Reasons to pick Samsung GX-20 over the Sony A7S III

 GX-20 A7S III 

Reasons to pick Sony A7S III over the Samsung GX-20

 A7S III GX-20 
LaunchedJuly 2020January 2008More recent by 152 months
Screen typeFully articulatedFixed Fully Articulating screen
Screen size3"2.7"Bigger screen (+0.3")
Screen resolution1440k230kCrisper screen (+1210k dot)
Selfie screen Take selfies
Touch screen Quickly navigate

Common features in the Samsung GX-20 and Sony A7S III

 GX-20 A7S III 
Focus manually More precise focus

Samsung GX-20 vs Sony A7S III Physical Comparison

When you are going to lug around your camera frequently, you have to take into account its weight and proportions. The Samsung GX-20 has got physical measurements of 142mm x 101mm x 72mm (5.6" x 4.0" x 2.8") along with a weight of 800 grams (1.76 lbs) while the Sony A7S III has measurements of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") accompanied by a weight of 699 grams (1.54 lbs).

Compare the Samsung GX-20 and Sony A7S III in the latest Camera with 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 employing at that time. Here is a front view measurement comparison of the GX-20 versus the A7S III.

Samsung GX-20 vs Sony A7S III size comparison

Using size and weight, the portability rating of the GX-20 and A7S III is 58 and 61 respectively.

Samsung GX-20 vs Sony A7S III top view buttons comparison

Samsung GX-20 vs Sony A7S III Sensor Comparison

Oftentimes, it's hard to envision the difference in sensor measurements merely by researching specifications. The photograph here will help give you a better sense of the sensor measurements in the GX-20 and A7S III.

Plainly, the 2 cameras come with different resolutions and different sensor measurements. The GX-20 having a smaller sensor will make achieving shallower DOF more difficult and the Samsung GX-20 will render more detail using its extra 3MP. Higher resolution will enable you to crop shots a good deal more aggressively. The older GX-20 will be disadvantaged when it comes to sensor tech.

Samsung GX-20 vs Sony A7S III sensor size comparison

Samsung GX-20 vs Sony A7S III Screen and ViewFinder

Samsung GX-20 vs Sony A7S III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Samsung GX-20 Portrait photography advice
Sony A7S III Portrait photography advice
72
manual focus
resolution is good (15 megapixels)
sensor size is good (APS-C)
supports RAW files
71
has manual focus
big sensor size (Full frame)
includes face detect focus
exports RAW files
sensor resolution low (12 megapixels)
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Street Comparison

Street photography with Samsung GX-20
Street photography with Sony A7S III
65
image stabilization (Sensor based)
sensor size is good (APS-C)
supports RAW files
environment sealing
no moving screen
76
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
exports RAW files
features touch to focus
environment sealing
great ISO range (102,400)
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Sports Comparison

Samsung GX-20 Sports photography factors
Sony A7S III Sports photography factors
68
image stabilization (Sensor based)
resolution is good (15 megapixels)
sensor size is good (APS-C)
environment sealing
supports phase detect auto focus
max frames per second very slow (3.0 fps)
76
great max shutter speed (1/8,000 seconds)
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
includes tracking focus
environment sealing
great battery power (600 CIPA)
supports phase detect auto focus
sensor resolution low (12MP)
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Travel Comparison

Travel photography with Samsung GX-20
Travel photography with Sony A7S III
64
environment sealing
resolution is good (15MP)
has built in flash
display isn't selfie friendly
70
great battery power (600 shots)
environment sealing
connects via bluetooth
features touch to focus
selfie friendly screen
sensor resolution low (12MP)
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Landscape Comparison

Landscape photography with Samsung GX-20
Landscape photography with Sony A7S III
71
manual focus
switch lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
resolution is good (15MP)
sensor size is good (APS-C)
supports RAW files
environment sealing
screen is small (2.7 inches)
77
has manual focus
change lenses (Sony E mount)
screen is a decent size (3")
image stabilization (Sensor based 5-axis)
big sensor size (Full frame)
great ISO range (102,400)
exports RAW files
environment sealing
great battery power (600 CIPA)
2 card slots
sensor resolution low (12MP)
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Vlogging Comparison

Vlogging with Samsung GX-20
Vlogging with Sony A7S III
9
no video
77
selfie friendly screen
touchscreen functionality
image stabilization (Sensor based 5-axis)
includes face detect focus
high quality video (3840 x 2160 pixels)
comes with microphone support
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Samsung GX-20 vs Sony A7S III Specifications

Detailed spec comparison table for Samsung GX-20 and Sony A7S III
 Samsung GX-20Sony Alpha A7S III
General Information
Manufacturer Samsung Sony
Model Samsung GX-20 Sony Alpha A7S III
Type Advanced DSLR Pro Mirrorless
Introduced 2008-01-24 2020-07-21
Physical type Mid-size SLR SLR-style mirrorless
Sensor Information
Processor - Bionz XR
Sensor type CMOS BSI-CMOS
Sensor size APS-C Full frame
Sensor measurements 23.4 x 15.6mm 35.6 x 23.8mm
Sensor surface area 365.0mm² 847.3mm²
Sensor resolution 15MP 12MP
Anti aliasing filter
Aspect ratio - 3:2 and 16:9
Full resolution 4688 x 3120 4240 x 2832
Max native ISO 3200 102400
Max boosted ISO 6400 409600
Lowest native ISO 100 80
RAW files
Lowest boosted ISO - 50
Autofocusing
Focus manually
AF touch
Continuous AF
Single AF
AF tracking
AF selectice
Center weighted AF
AF multi area
Live view AF
Face detection focusing
Contract detection focusing
Phase detection focusing
Number of focus points 11 759
Lens
Lens mounting type Pentax KAF2 Sony E
Available lenses 151 121
Focal length multiplier 1.5 1
Screen
Screen type Fixed Type Fully articulated
Screen size 2.7 inches 3 inches
Screen resolution 230k dots 1,440k dots
Selfie friendly
Liveview
Touch screen
Viewfinder Information
Viewfinder Optical (pentaprism) Electronic
Viewfinder resolution - 9,440k dots
Viewfinder coverage 95 percent 100 percent
Viewfinder magnification 0.64x 0.91x
Features
Lowest shutter speed 30 secs 30 secs
Highest shutter speed 1/4000 secs 1/8000 secs
Continuous shooting rate 3.0 frames/s 10.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Custom WB
Image stabilization
Built-in flash
Flash range 13.00 m (at ISO 100) no built-in flash
Flash options Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless no built-in flash
External flash
AE bracketing
White balance bracketing
Highest flash synchronize 1/180 secs -
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
Max video resolution None 3840x2160
Video format - MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265
Microphone support
Headphone support
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.2 Gen 1 (5 GBit/sec)
GPS None None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 800 grams (1.76 lb) 699 grams (1.54 lb)
Physical dimensions 142 x 101 x 72mm (5.6" x 4.0" x 2.8") 129 x 97 x 81mm (5.1" x 3.8" x 3.2")
DXO scores
DXO All around score 68 85
DXO Color Depth score 23.1 23.6
DXO Dynamic range score 11.2 13.3
DXO Low light score 714 2993
Other
Battery life - 600 images
Type of battery - Battery Pack
Battery model - NP-FZ100
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting With downloadable app
Type of storage SD/MMC/SDHC card Dual SD/CFexpress Type A slots
Card slots One Two
Price at launch $850 $3,499