Camera Rocket Review Our evaluation of A7S vs DMC-GH4

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 points

Responsiveness

How much delay is there between you and your photo?

continuous shooting

Reviews

What do the experts think?

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

No winner declared

Too close to call

Benchmarks Real world tests of Sony A7S vs Lumix DMC-GH4

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

Sony A7S
2,993 ISO
Lumix DMC-GH4
812 ISO

Continuous shooting Delay between fully pressing shutter to image capture

Sony A7S
5 fps
Lumix DMC-GH4
12 fps

Battery life How many photos per battery charge (CIPA)

Sony A7S
320 photos
Lumix DMC-GH4
500 photos

Color depth The number of variations of color the camera can capture

Sony A7S
23.6 bits
Lumix DMC-GH4
23.2 bits

Dynamic range Maximum range a camera can capture in one image from light to dark

Sony A7S
13.3 ev
Lumix DMC-GH4
12.8 ev

Features Key features of the Sony A7S  vs Lumix DMC-GH4 

Megapixels Maximum resolution images are captured at

Sony A7S
12.4 MP
Lumix DMC-GH4
16.1 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
0.71x

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

Sony A7S
69.1 microns
Lumix DMC-GH4
14.0 microns

Specifications Full list of technical specs

sensor

Sony A7S  vs
Lumix DMC-GH4 
Type Exmor R CMOS LiveMOS
Megapixels 12.4 MP 16.1 MP
Resolution 4064 x 3048 4624 x 3472
Size Full frame Four Thirds
Area 35.8 x 23.9 mm 17.3 x 13 mm
Crop factor 1.0x 2.1x
Pixel size 69.1 microns 14.0 microns
Light sensitivity 100 ISO to 409,600 ISO 200 ISO to 6,400 ISO
Light sensitivity (Boost) None 100 ISO to 25,600 ISO
Codecs
RAW
JPEG
Self cleaning sensor No Yes

focus system

Type Contrast detection Contrast detection
Focus points 25 49
Supports continuous Yes Yes

viewfinder

Viewfinder mirror None None
Viewfinder Yes Yes
Type Electronic Electronic
Coverage 100% 100%
Magnification 0.71x 1.34x
Viewfinder size 0.71x 0.64x
Display type TFT OLED
Display resolution 2,359 k dots 2,359 k dots

performance

Max continuous shooting 5 fps 12 fps
Battery life 320 500
Continuous shooting
12 fps
5 fps

video

Sony A7S  vs
Lumix DMC-GH4 
Video 1920 x 1080 @ 60 fps 3840 x 2160 @ 30 fps (100 Mbps, Quicktime)
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm
Autofocus while shooting video Manual Contrast detection
Autofocus type N/A Contrast detection
Autofocus supports continuous N/A Yes

display

Type LCD OLED
Size 3" 3"
Resolution 921 k dots 1,036 k dots
Has a touch screen No Yes
Has a flip out screen Yes Yes
Supports live view Yes Yes

shutter

Min 30 s 60 s
Max 1/8000 s 1/8000 s

form factor

Size 126.9 x 94.4 x 48.2 mm 132.9 x 93 x 84 mm
Thickness 48.2 mm 84 mm
Weight 489 g 560 g
Is weather sealed Yes Yes

features

Includes a GPS No No
Supports HDR Yes Yes
WiFi None 802.11 b/g/n
Automatic panorama Yes No
Create realistic 3D images No Yes
Image stabilization
Sony A7S
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Panasonic Lumix DMC-GH4
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