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Sony A7S III vs Sony a1

Portability
61 Imaging
65 Features
92 Overall
75
Sony Alpha A7S III front
 
Sony Alpha a1 front
Portability
61 Imaging
81 Features
93 Overall
85

Sony A7S III vs Sony a1 Key Specs

Sony A7S III
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Fully Articulated Screen
  • ISO 80 - 102400 (Bump 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
  • Previous Model is Sony A7S II
Sony a1
(Full Review)
  • 50MP - Full frame Sensor
  • 3" Tilting Display
  • ISO 100 - 32000 (Raise to 102400)
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Max Shutter
  • 7680 x 4320 video
  • Sony E Mount
  • 737g - 129 x 97 x 70mm
  • Launched January 2021
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Sony A7S III vs Sony a1 Overview

In this write-up, we are evaluating the Sony A7S III and Sony a1, both Pro Mirrorless digital cameras and they are both designed by Sony. There exists a sizeable gap between the image resolutions of the A7S III (12MP) and a1 (50MP) but they come with the same exact sensor size (Full frame).

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The A7S III was introduced 6 months earlier than the a1 so they are of a similar generation. Each of the cameras offer the identical body type (SLR-style mirrorless).

Before delving through a complete comparison, below is a simple view of how the A7S III matches up vs the a1 in the way of portability, imaging, features and an overall score.

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Reasons to pick Sony A7S III over the Sony a1

		

		

			
 A7S III a1 
Display typeFully articulatedTiltingFully Articulating display
Selfie screen  Easy selfies
		

	

	
	

		

		
Reasons to pick Sony a1 over the Sony A7S III

		

		

			
 a1 A7S III 
		

	

	
	

		

		
Common features in the Sony A7S III and Sony a1

		

		

			
 A7S III a1 
LaunchedJuly 2020January 2021Similar generation
Manually focus  More precise focus
Display sizing3"3"Equivalent display size
Display resolution1440k1440kThe same display resolution
Touch friendly display  Easily navigate
		

	

	

	
	
	
	

	

		

		
Sony A7S III vs Sony a1 Physical Comparison

		

		

			
When you are looking to carry around your camera frequently, you will need to take into account its weight and dimensions. The Sony A7S III provides physical measurements of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") and a weight of 699 grams (1.54 lbs) and the Sony a1 has dimensions of 129mm x 97mm x 70mm (5.1" x 3.8" x 2.8") having a weight of 737 grams (1.62 lbs).
Take a look at the Sony A7S III and Sony a1 in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses
Remember that, the weight of an Interchangeable Lens Camera will vary based on the lens you select at that moment. Underneath is the front view scale comparison of the A7S III against the a1.
Sony A7S III vs Sony a1 size comparison
Considering dimensions and weight, the portability score of the A7S III and a1 is 61 and 61 respectively.
Sony A7S III vs Sony a1 top view buttons comparison		

	

	
	

		

		
Sony A7S III vs Sony a1 Sensor Comparison

		

		

			
Quite often, it can be tough to envision the gap between sensor sizes just by looking at a spec sheet. The picture underneath may offer you a much better sense of the sensor measurements in the A7S III and a1.
Clearly, the two cameras offer the same exact sensor sizing but not the same megapixels. You should expect to see the Sony a1 to resolve greater detail using its extra 38 Megapixels. Greater resolution will also let you crop pics a little more aggressively.
	
			Sony A7S III vs Sony a1 sensor size comparison			
		

	

	
	

		

		
Sony A7S III vs Sony a1 Screen and ViewFinder

		

		

					

		Sony A7S III vs Sony a1 Screen and Viewfinder comparison	

	
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Photography Type Scores

		

	

	
Portrait Comparison
Sony A7S III Portrait photography features
Sony a1 Portrait photography features
71
 focusing manually
 great sensor size (Full frame)
 comes with face detection autofocus
 supports RAW files
 low MP (12MP)
88
 has manual focus
 flash sync speed is above average (1/400 seconds)
 sensor resolution is high (50 megapixels)
 sensor size is large (Full frame)
 provides face detection autofocus
 supports RAW files
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Street Comparison
 Sony A7S III as a Street photography camera
 Sony a1 as a Street photography camera
76
 image stabilization (Sensor based 5-axis)
 great sensor size (Full frame)
 supports RAW files
 features focus via touch
 weather proofing
 very good ISO range (102,400)
79
 screen tilts up and down
 has image stabilization (Sensor based 5-axis)
 sensor size is large (Full frame)
 supports RAW files
 comes with touch to focus
 environment proofing
 very good high ISO (32,000)
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Sports Comparison
Sports photography with Sony A7S III
Sports photography with Sony a1
76
 max shutter speed is good (1/8,000 seconds)
 image stabilization (Sensor based 5-axis)
 great sensor size (Full frame)
 comes with tracking autofocus
 weather proofing
 better than average battery pack (600 per charge)
 supports phase detect autofocus
 low MP (12MP)
90
 great max shutter speed (1/8,000 seconds)
 silent shooting (1/32,000 seconds)
 high max fps (30.0 frames per second)
 has image stabilization (Sensor based 5-axis)
 sensor resolution is high (50 megapixels)
 sensor size is large (Full frame)
 provides tracking autofocus
 environment proofing
 great battery pack (530 per charge)
 comes with phase detect autofocus
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Travel Comparison
Travel photography with Sony A7S III
Travel photography with Sony a1
70
 better than average battery pack (600 CIPA)
 weather proofing
 supports bluetooth
 features focus via touch
 selfie friendly display
 low MP (12MP)
73
 great battery pack (530 per charge)
 environment proofing
 supports bluetooth
 comes with touch to focus
 sensor resolution is high (50MP)
 does not contain selfie friendly screen
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Landscape Comparison
 Sony A7S III as a Landscape photography camera
 Sony a1 as a Landscape photography camera
77
 focusing manually
 switch lenses (Sony E mount)
 screen is a good size (3 inches)
 image stabilization (Sensor based 5-axis)
 great sensor size (Full frame)
 very good ISO range (102,400)
 supports RAW files
 weather proofing
 better than average battery pack (600 shots)
 has double storage slots
 low MP (12 megapixels)
88
 has manual focus
 change lenses (Sony E mount)
 decent sized screen (3 inches)
 has image stabilization (Sensor based 5-axis)
 sensor resolution is high (50MP)
 sensor size is large (Full frame)
 very good high ISO (32,000)
 supports RAW files
 environment proofing
 great battery pack (530 per charge)
 has double storage slots
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Vlogging Comparison
Sony A7S III Vlogging advice
Sony a1 Vlogging advice
77
 selfie friendly display
 has touchscreen
 image stabilization (Sensor based 5-axis)
 comes with face detection autofocus
 video res high (3840 x 2160 pixels)
 comes with external mic port
36
 touchscreen enabled
 has image stabilization (Sensor based 5-axis)
 provides face detection autofocus
 high quality video (7680 x 4320 pixels)
 does have external microphone port
 does not contain selfie friendly screen
Photography Glossary
	

		

			
Sony A7S III vs Sony a1 Specifications

		

		

					

		
		

			Detailed spec comparison table for Sony A7S III and Sony a1
 Sony Alpha A7S IIISony Alpha a1
General Information
Make Sony Sony
Model Sony Alpha A7S III Sony Alpha a1
Class Pro Mirrorless Pro Mirrorless
Introduced 2020-07-21 2021-01-26
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Chip Bionz XR -
Sensor type BSI-CMOS BSI-CMOS
Sensor size Full frame Full frame
Sensor measurements 35.6 x 23.8mm 35.9 x 24mm
Sensor area 847.3mm² 861.6mm²
Sensor resolution 12 megapixels 50 megapixels
Anti aliasing filter    
Aspect ratio 3:2 and  16:9 1:1, 4:3, 3:2 and  16:9
Highest Possible resolution 4240 x 2832 8640 x 5760
Maximum native ISO 102400 32000
Maximum enhanced ISO 409600 102400
Min native ISO 80 100
RAW format    
Min enhanced ISO 50 50
Autofocusing
Manual focus    
AF touch    
AF continuous    
AF single    
AF tracking    
Selective AF    
Center weighted AF    
Multi area AF    
AF live view    
Face detection focusing    
Contract detection focusing    
Phase detection focusing    
Number of focus points 759 759
Lens
Lens mount Sony E Sony E
Amount of lenses 121 133
Focal length multiplier 1 1
Screen
Screen type Fully articulated Tilting
Screen diagonal 3 inch 3 inch
Resolution of screen 1,440k dot 1,440k dot
Selfie friendly    
Liveview    
Touch screen    
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 9,440k dot 9,437k dot
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.91x 0.9x
Features
Min shutter speed 30 secs 30 secs
Max shutter speed 1/8000 secs 1/8000 secs
Max silent shutter speed - 1/32000 secs
Continuous shutter speed 10.0 frames/s 30.0 frames/s
Shutter priority    
Aperture priority    
Manual exposure    
Exposure compensation Yes Yes
Set WB    
Image stabilization    
Inbuilt flash    
Flash range no built-in flash no built-in flash
Flash modes no built-in flash Flash off, Autoflash, Fill-flash, Slow Sync., Rear Sync., Red-eye reduction, Wireless, Hi-speed sync
External flash    
AEB    
WB bracketing    
Max flash sync - 1/400 secs
Exposure
Multisegment exposure    
Average exposure    
Spot exposure    
Partial exposure    
AF area exposure    
Center weighted exposure    
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 7680x4320 (30p, 25p, 23.98)
Maximum video resolution 3840x2160 7680x4320
Video format MPEG-4, XAVC S, XAVC HS, XAVC S-1, H.264, H.265 XAVC S, XAVC HS, H.264, H.265
Microphone jack    
Headphone jack    
Connectivity
Wireless Built-In Built-In
Bluetooth    
NFC    
HDMI    
USB USB 3.2 Gen 1 (5 GBit/sec) Yes
GPS None None
Physical
Environmental seal    
Water proof    
Dust proof    
Shock proof    
Crush proof    
Freeze proof    
Weight 699g (1.54 lbs) 737g (1.62 lbs)
Dimensions 129 x 97 x 81mm (5.1" x 3.8" x 3.2") 129 x 97 x 70mm (5.1" x 3.8" x 2.8")
DXO scores
DXO Overall score 85 not tested
DXO Color Depth score 23.6 not tested
DXO Dynamic range score 13.3 not tested
DXO Low light score 2993 not tested
Other
Battery life 600 photos 530 photos
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
Time lapse shooting With downloadable app  
Type of storage Dual SD/CFexpress Type A slots Dual SD/CFexpress Type A slots (UHS-II supported)
Storage slots Dual Dual
Launch pricing $3,499 $6,498