Camera Rocket Review Our evaluation of A99 vs D800

Image Quality

RAW image quality independent of lens

SLT A99
10.0
Nikon D800
10.0
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?

SLT A99
10.0
Nikon D800
10.0
continuous shooting

Reviews

What do the experts think?

Reviews from sonyalpharumors.com, imaging-resource.com, techradar.com and 5 more

No winner declared

Too close to call

Benchmarks Real world tests of SLT A99 vs Nikon D800

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

SLT A99
1,555 ISO
Nikon D800
2,979 ISO

Resolution Results from photos of standard resolution charts

SLT A99
2,900 LPH
Nikon D800
3,100 LPH

Focus lag Delay between fully pressing shutter to image capture

SLT A99
127 ms
Nikon D800
209 ms

Startup delay Delay from power on to first photo

SLT A99
700 ms
Nikon D800
200 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A99
6 fps
Nikon D800
4 fps

Battery life How many photos per battery charge (CIPA)

SLT A99
500 photos
Nikon D800
900 photos

Features Key features of the SLT A99  vs Nikon D800 

Megapixels Maximum resolution images are captured at

SLT A99
24 MP
Nikon D800
36.2 MP

Max ISO Maximum light sensitivity of the sensor

SLT A99
25,600 ISO
Nikon D800
25,600 ISO

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

SLT A99
0.71x
Nikon D800
0.7x

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

SLT A99
35.8 microns
Nikon D800
23.8 microns

Reviews Word on the street

SLT A99  vs Nikon D800 

8.4
8.2
With a CIPA standard capacity of 410 shots using the EVF, it provides less than half the shooting capacity of the A99's rivals; a direct consequence of having to support full-time live view.
SLT A99

9.0
10.0
Otherwise the Nikon D800 is a highly dependable and capable camera that offers a versatile and improved auto focus system, an enhanced viewfinder with 100% frame coverage and a very good movie mode.
Nikon D800

8.3
8.6
And it handles bright, saturated reds, pinks and purples very well, without blowing out any detail.
Nikon D800

7.0
9.0
For example, in our shots taken a gym that was dimly lit by sodium lamps, chroma noise is clearly visible from around ISO 2500 when the images are viewed at 100% on the computer screen.
Nikon D800

Overall

8.4 Out of 10
9.0 Out of 10

Specifications Full list of technical specs

sensor

SLT A99  vs
Nikon D800 
Type EXMOR CMOS
Megapixels 24 MP 36.2 MP
Resolution 6000 x 4000 7360 x 4912
Size Full frame Full frame
Area 35.8 x 24 mm 35.9 x 24 mm
Crop factor 1.0x 1.0x
Pixel size 35.8 microns 23.8 microns
Light sensitivity 100 ISO to 25,600 ISO 100 ISO to 6,400 ISO
Codecs
RAW
JPEG
TIFF
Self cleaning sensor Yes Yes
Tested vertical resolution 2,900 LPH 3,100 LPH
Tested horizontal resolution 2,900 LPH 3,100 LPH

focus system

Type Phase detection Phase detection
Focus points 19 51
Cross type focus points 11 15
Supports continuous Yes Yes

shutter

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

form factor

Size 147 x 111 x 78 mm 146 x 123 x 82 mm
Thickness 78 mm 82 mm
Weight 812 g 1,000 g
Is weather sealed Yes Yes

features

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

video

SLT A99  vs
Nikon D800 
Video 1920 x 1080 @ 60 fps (17 Mbps, AVCHD, MPEG-4) 1920 x 1080 @ 30 fps
Shoots video in 24p Yes Yes
Shoots high speed video No No
External mic jack 3.5mm 3.5mm
Autofocus while shooting video Phase detection Contrast detection
Autofocus type Phase detection Contrast detection
Autofocus supports continuous Yes Yes

display

Type LCD LCD
Size 3" 3.2"
Resolution 1,229 k dots 921 k dots
Has a touch screen No No
Has a flip out screen Yes No
Supports live view Yes Yes

viewfinder

Viewfinder mirror Translucent Opaque
Viewfinder Yes Yes
Type Electronic Pentaprism
Coverage 100% 100%
Magnification 0.71x 0.7x
Viewfinder size 0.71x 0.7x

performance

Max continuous shooting 6 fps 4 fps
Battery life 500 900
Continuous shooting
4 fps @ 7360 x 4912, NEF 14bit, 20 shots
5 fps @ 6144 x 4080, NEF 14bit, 25 shots
6 fps @ 4800 x 3200, NEF 14bit, 29 shots
6 fps
Focus lag 127 ms 209 ms
Startup delay 700 ms 200 ms
Sony SLT A99
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Nikon D800
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