Camera Rocket Review Our evaluation of A7S vs 5D Mark III

Image Quality

RAW image quality independent of lens

DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

Focus lag and focus points

Responsiveness

How much delay is there between you and your photo?

Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

Reviews from sonyalpharumors.com, imaging-resource.com and dpreview.com

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

Winner
Canon EOS 5D Mark III 

Camera Rocket recommends the Canon EOS 5D Mark III  based on its focusing and responsiveness.

See full details

Benchmarks Real world tests of Sony A7S vs EOS 5D Mark III

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

Sony A7S
2,993 ISO
EOS 5D Mark III
2,293 ISO

Focus lag Delay between fully pressing shutter to image capture

Sony A7S
178 ms

Shutter lag Delay to take a photo when prefocused

Startup delay Delay from power on to first photo

Sony A7S
2,000 ms

Continuous shooting Delay between fully pressing shutter to image capture

Battery life How many photos per battery charge (CIPA)

Sony A7S
320 photos
EOS 5D Mark III
950 photos

Features Key features of the Sony A7S  vs EOS 5D Mark III 

Megapixels Maximum resolution images are captured at

Sony A7S
12.4 MP
EOS 5D Mark III
22.3 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

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

Sony A7S
69.1 microns
EOS 5D Mark III
38.7 microns

Specifications Full list of technical specs

sensor

Sony A7S  vs
EOS 5D Mark III 
Type Exmor R CMOS CMOS
Megapixels 12.4 MP 22.3 MP
Resolution 4064 x 3048 5456 x 4096
Size Full frame Full frame
Area 35.8 x 23.9 mm 36 x 24 mm
Crop factor 1.0x 1.0x
Pixel size 69.1 microns 38.7 microns
Light sensitivity 100 ISO to 409,600 ISO 100 ISO to 25,600 ISO
Light sensitivity (Boost) None 50 ISO to 102,400 ISO
Codecs
RAW
JPEG
Self cleaning sensor No Yes

focus system

Type Contrast detection Phase detection
Focus points 25 61
Supports continuous Yes No

shutter

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

form factor

Size 126.9 x 94.4 x 48.2 mm 152 x 116 x 76 mm
Thickness 48.2 mm 76 mm
Weight 489 g 950 g
Is weather sealed Yes Yes

features

Includes a GPS No No
Supports HDR Yes Yes
WiFi None None
Automatic panorama Yes No
Create realistic 3D images No No
Image stabilization

video

Sony A7S  vs
EOS 5D Mark III 
Video 1920 x 1080 @ 60 fps 1920 x 1080 @ 30 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm

display

Type LCD LCD
Size 3" 3.2"
Resolution 921 k dots 1,040 k dots
Has a touch screen No No
Has a flip out screen Yes No
Supports live view Yes Yes

viewfinder

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

performance

Max continuous shooting 5 fps 6 fps
Battery life 320 950
Continuous shooting
6 fps @ 5760 x 3840, JPEG, 65 shots
6 fps @ 5760 x 3840, RAW, 13 shots
5 fps
Focus lag 178 ms 120 ms
Shutter lag 24 ms 61 ms
Startup delay 2,000 ms 500 ms
Sony A7S
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Canon EOS 5D Mark III
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