General

Nikon D3S Sony Alpha a9
Brand
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Nikon Sony
Lowest price
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$1,868.81 $3,382.09
Announced
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October 2009 April 2017

Sensor

Type
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CMOS CMOS
Crop factor
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1x 1x
Megapixels
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12.1 MP 24 MP
Light sensitivity
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12,800 ISO 204,800 ISO
Light sensitivity (boost)
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102,400 ISO Unknown
Sensor cleaning
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Yes Unknown

Sensor (Advanced)

True resolution
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12.1 MP 24 MP
Native resolution
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4256 × 2832 6000 × 4000
Pixel size
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71.4 µm² 35.3 µm²

Screen

Type
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LCD LCD
Size
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3" 3"
Resolution
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921k dots 1,440k dots
Touch screen
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No Yes
Flips out
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No Yes
Live view
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Yes Yes

Lenses

Lens availability
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171 lenses 92 lenses
Lens mount
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Nikon FX Sony E (Full Frame)

Form factor

Size
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160×157×88 mm 127×96×63 mm
Depth
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3.5" 2.5"
Weight
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1,240 g 673 g
Interchangeable lenses
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Yes Yes
Waterproof
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No No
Weather sealed
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Yes Yes
Built-in focus motor
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Yes No

Viewfinder

Type
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Pentaprism Digital
Viewfinder size
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0.70x 0.77x
Coverage
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100% 100%

Movies

Format
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720p @ 24fps Unknown
Supports 24p
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Yes Unknown
High-speed framerate
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None Unknown
External mic jack
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Yes Yes
Autofocus
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None Unknown
All formats
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  1. 320 x 216 @ 24fps
  2. 640 x 424 @ 24fps
  3. 720p @ 24fps
Unknown

Features

Panorama
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No Unknown
HDR
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No Unknown
3D
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No Unknown
Image stabilization
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None
  1. Sensor shift
Supports RAW
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Yes Unknown
GPS
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No No

Performance

Startup delay
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120 ms Unknown
Shutter lag
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197 ms Unknown
Battery life
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4200 shots 650 shots
Continuous shooting
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9 fps 20 fps

Focus system

Autofocus
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Phase detection Phase detection
Focus points
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51 693
Cross type focus points
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15 Unknown

Shutter

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

Flash

Built-in flash
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No No
External connection
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Yes Yes

Storage

Storage slots
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2 1
Supported formats
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  1. CompactFlash (Type I)
  2. CompactFlash (Type I)
  1. SD
  2. SDHC
  3. SDXC

DXO Mark Scores

Image quality
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82.0 Unknown
Color depth
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23.5 bits Unknown
Dynamic range
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12 EV Unknown
Low light performance
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3,253 ISO Unknown
Nikon D3S
D3S
Nikon

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Alpha a9
Sony

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