Benchmarks Real world tests of SLT A99 vs A77 II

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

SLT A99
1,555 ISO
SLT A77 II
1,013 ISO

Resolution Results from photos of standard resolution charts

SLT A99
2,900 LPH
SLT A77 II
2,400 LPH

Continuous shooting Delay between fully pressing shutter to image capture

SLT A99
6 fps
SLT A77 II
12 fps

Battery life How many photos per battery charge (CIPA)

SLT A99
500 photos
SLT A77 II
410 photos

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

SLT A99
25.0 bits
SLT A77 II
24.4 bits

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

SLT A99
14.0 ev
SLT A77 II
13.4 ev

Features Key features of the SLT A99  vs A77 II 

Megapixels Maximum resolution images are captured at

SLT A99
24 MP
SLT A77 II
24.7 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

SLT A99
0.71x
SLT A77 II
0.71x

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

SLT A99
35.8 microns
SLT A77 II
14.8 microns

Specifications Full list of technical specs

sensor

SLT A99  vs
A77 II 
Type EXMOR CMOS
Megapixels 24 MP 24.7 MP
Resolution 6000 x 4000 5736 x 4304
Size Full frame APS-C
Area 35.8 x 24 mm 23.5 x 15.6 mm
Crop factor 1.0x 1.5x
Pixel size 35.8 microns 14.8 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 2,400 LPH
Tested horizontal resolution 2,900 LPH 2,400 LPH

focus system

Type Phase detection Phase detection
Focus points 19 79
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 142.6 x 104.2 x 80.9 mm
Thickness 78 mm 80.9 mm
Weight 812 g 647 g
Is weather sealed Yes Yes

features

Includes a GPS Yes No
Supports HDR Yes Yes
WiFi None 802.11 b/g/n
Automatic panorama Yes Yes
Create realistic 3D images No No
Image stabilization
Sensor shift

video

SLT A99  vs
A77 II 
Video 1920 x 1080 @ 60 fps (17 Mbps, AVCHD, MPEG-4) 1920 x 1080 @ 60 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 Phase detection
Autofocus type Phase detection Phase detection
Autofocus supports continuous Yes Yes

display

Type LCD LCD
Size 3" 3"
Resolution 1,229 k dots 1,228 k dots
Has a touch screen No No
Has a flip out screen Yes Yes
Supports live view Yes Yes

viewfinder

Viewfinder mirror Translucent Translucent
Viewfinder Yes Yes
Type Electronic Electronic
Coverage 100% 100%
Magnification 0.71x 1.09x
Viewfinder size 0.71x 0.71x
Display type OLED OLED
Display resolution 2,360 k dots 2,359 k dots

performance

Max continuous shooting 6 fps 12 fps
Battery life 500 410
Continuous shooting
12 fps, JPEG
12 fps
6 fps
Sony SLT A99
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Sony SLT A77 II
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