Camera Rocket Review Our evaluation of A7S vs D3S

Image Quality

RAW image quality independent of lens

DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range


How fast and easily does the camera nail focus

Focus lag and focus points


How much delay is there between you and your photo?

Focus lag, continuous shooting and Startup delay


What do the experts think?

Sony A7S
Nikon D3S
Reviews from, and

No winner declared

Too close to call

Benchmarks Real world tests of Sony A7S vs Nikon D3S

Low light image quality Highest ISO setting that still achieves great image quality

Sony A7S
2,993 ISO
Nikon D3S
3,253 ISO

Focus lag Delay between fully pressing shutter to image capture

Sony A7S
178 ms
Nikon D3S
197 ms

Shutter lag Delay to take a photo when prefocused

Sony A7S
24 ms
Nikon D3S
43 ms

Startup delay Delay from power on to first photo

Sony A7S
2,000 ms
Nikon D3S
120 ms

Continuous shooting Delay between fully pressing shutter to image capture

Sony A7S
5 fps
Nikon D3S
9 fps

Battery life How many photos per battery charge (CIPA)

Sony A7S
320 photos
Nikon D3S
4,200 photos

Features Key features of the Sony A7S  vs Nikon D3S 

Megapixels Maximum resolution images are captured at

Sony A7S
12.4 MP
Nikon D3S
12.1 MP

Focus points How many different points the camera can focus on

Screen size Larger screens make it easier to preview and review photos

Viewfinder size Large viewfinders are brighter and more comfortable to use

Sony A7S
Nikon D3S

Pixel size How much area of the sensor is dedicated to each pixel

Sony A7S
69.1 microns
Nikon D3S
71.4 microns

Specifications Full list of technical specs


Sony A7S  vs
Nikon D3S 
Type Exmor R CMOS CMOS
Megapixels 12.4 MP 12.1 MP
Resolution 4064 x 3048 4256 x 2832
Size Full frame Full frame
Area 35.8 x 23.9 mm 36 x 23.9 mm
Crop factor 1.0x 1.0x
Pixel size 69.1 microns 71.4 microns
Light sensitivity 100 ISO to 409,600 ISO 200 ISO to 12,800 ISO
Light sensitivity (Boost) None 12,800 ISO to 102,400 ISO
Self cleaning sensor No Yes

focus system

Type Contrast detection Phase detection
Focus points 25 51
Supports continuous Yes No


Min 30 s 30 s
Max 1/8000 s 1/8000 s

form factor

Size 126.9 x 94.4 x 48.2 mm 160 x 157 x 88 mm
Thickness 48.2 mm 88 mm
Weight 489 g 1,240 g
Is weather sealed Yes Yes


Includes a GPS No No
Supports HDR Yes No
Automatic panorama Yes No
Create realistic 3D images No No
Image stabilization


Sony A7S  vs
Nikon D3S 
Video 1920 x 1080 @ 60 fps 1280 x 720 @ 24 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm
Autofocus while shooting video Manual


Size 3" 3"
Resolution 921 k dots 921 k dots
Has a touch screen No No
Has a flip out screen Yes No
Supports live view Yes Yes


Viewfinder mirror None Opaque
Viewfinder Yes Yes
Type Electronic Pentaprism
Coverage 100% 100%
Magnification 0.71x 0.7x
Viewfinder size 0.71x 0.7x


Max continuous shooting 5 fps 9 fps
Battery life 320 4,200
Continuous shooting
9 fps, JPEG
5 fps
Focus lag 178 ms 197 ms
Shutter lag 24 ms 43 ms
Startup delay 2,000 ms 120 ms
Sony A7S
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Nikon D3S
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