Camera Rocket Review Our evaluation of A77 vs 70D

Image Quality

RAW image quality independent of lens

SLT A77
9.6
EOS 70D
9.9
DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

SLT A77
6.6
EOS 70D
6.6
focus points

Responsiveness

How much delay is there between you and your photo?

SLT A77
10.0
EOS 70D
10.0
continuous shooting

Reviews

What do the experts think?

SLT A77
9.3
EOS 70D
9.5
Reviews from sonyalpharumors.com, techradar.com, trustedreviews.com, photographyblog.com and 3 more

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

SLT A77
9.1
EOS 70D
9.3

Winner
Canon EOS 70D 

Camera Rocket recommends the Canon EOS 70D  based on its image quality and reviews.

See full details

Benchmarks Real world tests of SLT A77 vs EOS 70D

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

SLT A77
801 ISO
EOS 70D
926 ISO

Focus lag Delay between fully pressing shutter to image capture

SLT A77
124 ms
EOS 70D
75 ms

Shutter lag Delay to take a photo when prefocused

SLT A77
54 ms
EOS 70D
59 ms

Startup delay Delay from power on to first photo

SLT A77
3,100 ms
EOS 70D
700 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A77
12 fps
EOS 70D
7 fps

Battery life How many photos per battery charge (CIPA)

SLT A77
530 photos
EOS 70D
920 photos

Features Key features of the SLT A77  vs EOS 70D 

Megapixels Maximum resolution images are captured at

SLT A77
24 MP
EOS 70D
20 MP

Max ISO Maximum light sensitivity of the sensor

SLT A77
25,600 ISO
EOS 70D
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 A77
0.72x
EOS 70D
0.59x

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

SLT A77
15.3 microns
EOS 70D
16.9 microns

Reviews Word on the street

SLT A77  vs EOS 70D 

8.2
8.3
The LCD is really nice, with a responsive touch screen and good visibility in most conditions.
EOS 70D

8.0
10.0

Overall

8.6 Out of 10
9.0 Out of 10

Specifications Full list of technical specs

sensor

SLT A77  vs
EOS 70D 
Type CMOS CMOS
Megapixels 24 MP 20 MP
Resolution 6000 x 4000 5472 x 3648
Size APS-C APS-C
Area 23.5 x 15.6 mm 22.5 x 15 mm
Crop factor 1.5x 1.6x
Pixel size 15.3 microns 16.9 microns
Light sensitivity 100 ISO to 16,000 ISO 100 ISO to 12,800 ISO
Light sensitivity (Boost) 50 ISO to 25,600 ISO 12,800 ISO to 25,600 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes

focus system

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

viewfinder

Viewfinder mirror Translucent Opaque
Viewfinder Yes Yes
Type Electronic Pentaprism
Coverage 100% 98%
Magnification 1.1x 0.95x
Viewfinder size 0.72x 0.59x

performance

Max continuous shooting 12 fps 7 fps
Battery life 530 920
Continuous shooting
12 fps, JPEG
7 fps
Focus lag 124 ms 75 ms
Shutter lag 54 ms 59 ms
Startup delay 3,100 ms 700 ms

video

SLT A77  vs
EOS 70D 
Video 1920 x 1080 @ 60 fps 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 Phase detection
Autofocus type Phase detection Phase detection
Autofocus supports continuous Yes Yes

display

Type LCD LCD
Size 3" 3"
Resolution 921 k dots 1,040 k dots
Has a touch screen No Yes
Has a flip out screen Yes Yes
Supports live view Yes Yes

shutter

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

form factor

Size 143 x 104 x 81 mm 145 x 106 x 79 mm
Thickness 81 mm 79 mm
Weight 732 g 755 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 No
Create realistic 3D images Yes No
Image stabilization
Sensor shift
Sony SLT A77
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Canon EOS 70D
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