Camera Rocket Review Our evaluation of A99 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 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, techradar.com and 5 more

No winner declared

Too close to call

Benchmarks Real world tests of SLT A99 vs EOS 5D Mark III

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

SLT A99
1,555 ISO
EOS 5D Mark III
2,293 ISO

Resolution Results from photos of standard resolution charts

SLT A99
2,900 LPH
EOS 5D Mark III
2,800 LPH

Focus lag Delay between fully pressing shutter to image capture

SLT A99
127 ms

Startup delay Delay from power on to first photo

SLT A99
700 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A99
6 fps

Battery life How many photos per battery charge (CIPA)

SLT A99
500 photos
EOS 5D Mark III
950 photos

Features Key features of the SLT A99  vs EOS 5D Mark III 

Megapixels Maximum resolution images are captured at

SLT A99
24 MP
EOS 5D Mark III
22.3 MP

Max ISO Maximum light sensitivity of the sensor

SLT A99
25,600 ISO
EOS 5D Mark III
102,400 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

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

SLT A99
35.8 microns
EOS 5D Mark III
38.7 microns

Reviews Word on the street

SLT A99  vs EOS 5D Mark III 

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
9.0
As with Live View, continuous phase-detection AF is possible whilst shooting movies on the A99, a distinct advantage over most DSLR cameras and fast enough to rival Compact System Cameras like the Panasonic Lumix GH series.
SLT A99

8.3
8.2
In addition to the complete set of essential features for a pro camera, the A99V has a couple of unique features for this class, including built-in GPS (which strains the already lackluster battery life a bit), in-camera image stabilization (both Canon and Nikon use lens-based IS), and a built-in stereo microphone (which is nice to have in a pinch).
SLT A99

7.0
9.0
We found that the screen provides a sharp, clear view even when shooting outside in bright sunlight.
EOS 5D Mark III

Overall

8.4 Out of 10
8.8 Out of 10

Specifications Full list of technical specs

sensor

SLT A99  vs
EOS 5D Mark III 
Type EXMOR CMOS
Megapixels 24 MP 22.3 MP
Resolution 6000 x 4000 5456 x 4096
Size Full frame Full frame
Area 35.8 x 24 mm 36 x 24 mm
Crop factor 1.0x 1.0x
Pixel size 35.8 microns 38.7 microns
Light sensitivity 100 ISO to 25,600 ISO 100 ISO to 25,600 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes
Tested vertical resolution 2,900 LPH 2,800 LPH
Tested horizontal resolution 2,900 LPH 2,800 LPH

focus system

Type Phase detection Phase detection
Focus points 19 61
Cross type focus points 11 41
Supports continuous Yes No

shutter

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

form factor

Size 147 x 111 x 78 mm 152 x 116 x 76 mm
Thickness 78 mm 76 mm
Weight 812 g 950 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
EOS 5D Mark III 
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

display

Type LCD LCD
Size 3" 3.2"
Resolution 1,229 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 Translucent 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 6 fps 6 fps
Battery life 500 950
Continuous shooting
6 fps @ 5760 x 3840, JPEG, 65 shots
6 fps @ 5760 x 3840, RAW, 13 shots
6 fps
Focus lag 127 ms 120 ms
Startup delay 700 ms 500 ms
Sony SLT A99
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Canon EOS 5D Mark III
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