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Olympus E-M1 II vs Sony A7S

Portability
68 Imaging
60 Features
93 Overall
73
Olympus OM-D E-M1 Mark II front
 
Sony Alpha A7S front
Portability
77 Imaging
60 Features
73 Overall
65

Olympus E-M1 II vs Sony A7S Key Specs

Olympus E-M1 II
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 574g - 134 x 91 x 67mm
  • Revealed September 2016
  • Previous Model is Olympus E-M1
  • Newer Model is Olympus E-M1 III
Sony A7S
(Full Review)
  • 12MP - Full frame Sensor
  • 3" Tilting Screen
  • ISO 100 - 409600
  • 1/8000s Max Shutter
  • 3840 x 2160 video
  • Sony E Mount
  • 489g - 127 x 94 x 48mm
  • Released April 2014
  • Updated by Sony A7S II
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Olympus E-M1 II vs Sony A7S Overview

Let's look closer at the Olympus E-M1 II and Sony A7S, both Pro Mirrorless digital cameras by manufacturers Olympus and Sony. There exists a big gap between the resolutions of the E-M1 II (20MP) and A7S (12MP) and the E-M1 II (Four Thirds) and A7S (Full frame) enjoy different sensor sizes.

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The E-M1 II was introduced 2 years after the A7S which is quite a big gap as far as technology is concerned. Each of the cameras offer the identical body type (SLR-style mirrorless).

Before getting in to a in-depth comparison, below is a simple summation of how the E-M1 II matches up against the A7S in terms of portability, imaging, features and an overall mark.

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Reasons to pick Olympus E-M1 II over the Sony A7S

		

		

			
 E-M1 II A7S 
ReleasedSeptember 2016April 2014Newer by 30 months
Screen typeFully ArticulatedTiltingFully Articulating screen
Selfie screen  Easy selfies
Touch screen  Quickly navigate
		

	

	
	

		

		
Reasons to pick Sony A7S over the Olympus E-M1 II

		

		

			
 A7S E-M1 II 
Screen resolution1230k1037kSharper screen (+193k dot)
		

	

	
	

		

		
Common features in the Olympus E-M1 II and Sony A7S

		

		

			
 E-M1 II A7S 
Manual focus  Very accurate focus
Screen sizing3"3"Equivalent screen dimensions
		

	

	

	
	
	
	

	

		

		
Olympus E-M1 II vs Sony A7S Physical Comparison

		

		

			
If you are planning to travel with your camera often, you have to think about its weight and volume. The Olympus E-M1 II has got outer dimensions of 134mm x 91mm x 67mm (5.3" x 3.6" x 2.6") with a weight of 574 grams (1.27 lbs) and the Sony A7S has sizing of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") accompanied by a weight of 489 grams (1.08 lbs).
Analyze the Olympus E-M1 II and Sony A7S in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses
Do not forget, the weight of an Interchangeable Lens Camera will vary based on the lens you are using during that time. Underneath is the front view measurements comparison of the E-M1 II against the A7S.
Olympus E-M1 II vs Sony A7S size comparison
Looking at dimensions and weight, the portability score of the E-M1 II and A7S is 68 and 77 respectively.
Olympus E-M1 II vs Sony A7S top view buttons comparison		

	

	
	

		

		
Olympus E-M1 II vs Sony A7S Sensor Comparison

		

		

			
Normally, it is very tough to visualize the contrast between sensor dimensions only by going over technical specs. The image here should give you a better sense of the sensor sizes in the E-M1 II and A7S.
As you have seen, both the cameras enjoy different megapixels and different sensor dimensions. The E-M1 II with its tinier sensor is going to make shooting shallower DOF more difficult and the Olympus E-M1 II will offer greater detail using its extra 8MP. Higher resolution will also help you crop photographs far more aggressively. The more recent E-M1 II provides a benefit in sensor technology.
	
			Olympus E-M1 II vs Sony A7S sensor size comparison			
		

	

	
	

		

		
Olympus E-M1 II vs Sony A7S Screen and ViewFinder

		

		

					

		Olympus E-M1 II vs Sony A7S Screen and Viewfinder comparison	

	
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Photography Type Scores

		

	

	
Portrait Comparison
Olympus E-M1 II Portrait photography features
Sony A7S Portrait photography features
76
 you can focus manually
 MP count good (20MP)
 good sensor size (Four Thirds)
 comes with face detection focusing
 delivers RAW formats
68
 you can focus manually
 sensor size is big (Full frame)
 includes face detection autofocus
 supports RAW files
 low megapixels (12MP)
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Street Comparison
 Olympus E-M1 II as a Street photography camera
 Sony A7S as a Street photography camera
78
 fully articulated screen
 image stabilization (Sensor based 5-axis)
 good sensor size (Four Thirds)
 delivers RAW formats
 offers focus via touch
 weather proofing
 lighter than average (574 grams)
 very good high ISO (25,600)
76
 has a tilting screen
 sensor size is big (Full frame)
 supports RAW files
 weather proofing
 lighter than competition (489g)
 very good high ISO (409,600)
 no image stabilization
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Sports Comparison
Sports photography with Olympus E-M1 II
Sports photography with Sony A7S
75
 high shutter speed (1/8,000 seconds)
 quiet shutter (1/32,000 seconds)
 fast shooting (60.0 frames per second)
 image stabilization (Sensor based 5-axis)
 MP count good (20 megapixels)
 good sensor size (Four Thirds)
 comes with tracking autofocus
 weather proofing
 sensor has phase detect AF
 low battery life (350 shots)
52
 high shutter speed (1/8,000 seconds)
 sensor size is big (Full frame)
 includes tracking autofocus
 weather proofing
 slow fps (5.0 fps)
 no image stabilization
 low megapixels (12 megapixels)
 terrible battery pack (360 CIPA)
 doesn't have phase detect autofocus
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Travel Comparison
Olympus E-M1 II Travel photography information
Sony A7S Travel photography information
72
 lighter than average (574 grams)
 weather proofing
 offers focus via touch
 MP count good (20MP)
 screen is selfie friendly
 low battery life (350 shots)
58
 lighter than competition (489 grams)
 weather proofing
 terrible battery pack (360 CIPA)
 low megapixels (12MP)
 does not have selfie friendly display
Photography Glossary
Landscape Comparison
Olympus E-M1 II Landscape photography details
Sony A7S Landscape photography details
76
 you can focus manually
 switch lenses (Micro Four Thirds mount)
 pretty good screen size (3 inches)
 image stabilization (Sensor based 5-axis)
 MP count good (20MP)
 good sensor size (Four Thirds)
 no anti aliasing filter
 very good high ISO (25,600)
 delivers RAW formats
 weather proofing
 has double storage slots
 low battery life (350 CIPA)
66
 you can focus manually
 switch lenses (Sony E mount)
 screen size is good (3")
 sensor size is big (Full frame)
 very good high ISO (409,600)
 supports RAW files
 weather proofing
 no image stabilization
 low megapixels (12 megapixels)
 terrible battery pack (360 per charge)
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Vlogging Comparison
Olympus E-M1 II Vlogging information
Sony A7S Vlogging information
79
 screen is selfie friendly
 touch screen
 image stabilization (Sensor based 5-axis)
 comes with face detection focusing
 video resolution high (4096 x 2160 pxls)
 includes external mic port
 lighter than average (574 grams)
34
 includes face detection autofocus
 video resolution high (3840 x 2160 pxls)
 does have external microphone port
 lighter than competition (489g)
 does not have selfie friendly display
 no image stabilization
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Olympus E-M1 II vs Sony A7S Specifications

		

		

					

		
		

			Detailed spec comparison table for Olympus E-M1 II and Sony A7S
 Olympus OM-D E-M1 Mark IISony Alpha A7S
General Information
Brand Name Olympus Sony
Model Olympus OM-D E-M1 Mark II Sony Alpha A7S
Category Pro Mirrorless Pro Mirrorless
Revealed 2016-09-19 2014-04-06
Body design SLR-style mirrorless SLR-style mirrorless
Sensor Information
Powered by TruePic VIII Bionz X
Sensor type CMOS CMOS
Sensor size Four Thirds Full frame
Sensor measurements 17.4 x 13mm 35.8 x 23.9mm
Sensor surface area 226.2mm² 855.6mm²
Sensor resolution 20MP 12MP
Anti aliasing filter    
Aspect ratio 4:3 3:2 and  16:9
Highest Possible resolution 5184 x 3888 4240 x 2832
Maximum native ISO 25600 409600
Minimum native ISO 200 100
RAW photos    
Minimum enhanced ISO 64 -
Autofocusing
Focus manually    
Touch focus    
AF continuous    
AF single    
Tracking AF    
AF selectice    
Center weighted AF    
Multi area AF    
Live view AF    
Face detect AF    
Contract detect AF    
Phase detect AF    
Number of focus points 121 25
Lens
Lens mount Micro Four Thirds Sony E
Number of lenses 107 121
Crop factor 2.1 1
Screen
Range of display Fully Articulated Tilting
Display sizing 3 inch 3 inch
Display resolution 1,037 thousand dot 1,230 thousand dot
Selfie friendly    
Liveview    
Touch capability    
Viewfinder Information
Viewfinder Electronic Electronic
Viewfinder resolution 2,360 thousand dot 2,359 thousand dot
Viewfinder coverage 100% 100%
Viewfinder magnification 0.74x 0.71x
Features
Min shutter speed 60s 30s
Max shutter speed 1/8000s 1/8000s
Max quiet shutter speed 1/32000s -
Continuous shutter speed 60.0 frames/s 5.0 frames/s
Shutter priority    
Aperture priority    
Manually set exposure    
Exposure compensation Yes Yes
Set WB    
Image stabilization    
Inbuilt flash    
Flash range 9.10 m (at ISO 100) no built-in flash
Flash modes Redeye, Fill-in, Flash Off, Red-eye Slow sync.(1st curtain), Slow sync.(1st curtain), Slow sync.(2nd curtain), Manual no built-in flash
Hot shoe    
Auto exposure bracketing    
WB bracketing    
Max flash sync 1/250s -
Exposure
Multisegment exposure    
Average exposure    
Spot exposure    
Partial exposure    
AF area exposure    
Center weighted exposure    
Video features
Supported video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM, 3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM 3840 x 2160, XAVC S 1080 60p(50Mbps), 30p (50Mbps), 24p (50Mbps). 720 120p (50Mbps). AVCHD 60p (28Mbps), 60i (24Mbps/17Mbps), 24p (24Mbps/17Mbps)
Maximum video resolution 4096x2160 3840x2160
Video format MOV, H.264 MPEG-4, AVCHD, XAVC
Microphone jack    
Headphone jack    
Connectivity
Wireless Built-In Built-In
Bluetooth    
NFC    
HDMI    
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment seal    
Water proof    
Dust proof    
Shock proof    
Crush proof    
Freeze proof    
Weight 574 grams (1.27 lb) 489 grams (1.08 lb)
Dimensions 134 x 91 x 67mm (5.3" x 3.6" x 2.6") 127 x 94 x 48mm (5.0" x 3.7" x 1.9")
DXO scores
DXO Overall score 80 87
DXO Color Depth score 23.7 23.9
DXO Dynamic range score 12.8 13.2
DXO Low light score 1312 3702
Other
Battery life 350 photographs 360 photographs
Battery form Battery Pack Battery Pack
Battery model BLH-1 NP-FW50
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec; continuous (3 or 5 exposures))
Time lapse shooting   With downloadable app
Storage media Dual SD/SDHC/SDXC slots SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Storage slots Dual One
Price at release $1,700 $1,998