Camera Rocket Review Our evaluation of A58 vs 550D

Image Quality

RAW image quality independent of lens

SLT A58
9.5
EOS 550D
9.5
DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

SLT A58
6.5
EOS 550D
6.6
Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

SLT A58
7.8
EOS 550D
8.4
Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

SLT A58
9.2
EOS 550D
9.2
Reviews from sonyalpharumors.com and techradar.com

No winner declared

Too close to call

Benchmarks Real world tests of SLT A58 vs EOS 550D

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

SLT A58
753 ISO
EOS 550D
784 ISO

Resolution Results from photos of standard resolution charts

SLT A58
2,400 LPH
EOS 550D
2,100 LPH

Focus lag Delay between fully pressing shutter to image capture

SLT A58
326 ms
EOS 550D
252 ms

Shutter lag Delay to take a photo when prefocused

SLT A58
54 ms
EOS 550D
96 ms

Startup delay Delay from power on to first photo

SLT A58
1,900 ms
EOS 550D
400 ms

Continuous shooting Delay between fully pressing shutter to image capture

SLT A58
8 fps
EOS 550D
3.7 fps

Features Key features of the SLT A58  vs EOS 550D 

Megapixels Maximum resolution images are captured at

SLT A58
20.1 MP
EOS 550D
17.9 MP

Max ISO Maximum light sensitivity of the sensor

SLT A58
25,600 ISO
EOS 550D
12,800 ISO

Focus points How many different points the camera can focus on

Screen size Larger screens make it easier to preview and review photos

SLT A58
2.7"

Viewfinder size Large viewfinders are brighter and more comfortable to use

SLT A58
0.65x
EOS 550D
0.54x

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

SLT A58
18.3 microns
EOS 550D
18.5 microns

Reviews Word on the street

SLT A58  vs EOS 550D 

8.0
9.0
While the EOS 550D can shoot at 3.7 frames per second in Continuous Shooting Mode, it's restricted to 34 JPEG images, or six RAW files – so sports and action photographers might want to look elsewhere.
EOS 550D

Specifications Full list of technical specs

sensor

SLT A58  vs
EOS 550D 
Type CMOS CMOS
Megapixels 20.1 MP 17.9 MP
Resolution 5176 x 3880 5184 x 3456
Size APS-C APS-C
Area 23.5 x 15.6 mm 22.3 x 14.9 mm
Crop factor 1.5x 1.6x
Pixel size 18.3 microns 18.5 microns
Light sensitivity 100 ISO to 16,000 ISO 100 ISO to 6,400 ISO
Light sensitivity (Boost) 16,000 ISO to 25,600 ISO 6,400 ISO to 12,800 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes
Tested vertical resolution 2,400 LPH 2,100 LPH
Tested horizontal resolution 2,400 LPH 2,100 LPH

focus system

Type Phase detection Phase detection
Focus points 15 9
Cross type focus points 3 1
Supports continuous Yes No

shutter

Min 30 s 30 s
Max 1/4000 s 1/4000 s

form factor

Size 129 x 95 x 78 mm 129 x 98 x 62 mm
Thickness 78 mm 62 mm
Weight 492 g 530 g
Is weather sealed No No

features

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

video

SLT A58  vs
EOS 550D 
Video 1920 x 1080 @ 29.97 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 Manual
Autofocus type Phase detection N/A
Autofocus supports continuous Yes N/A

display

Type LCD LCD
Size 2.7" 3"
Resolution 460 k dots 1,040 k dots
Has a touch screen No No
Has a flip out screen No No
Supports live view Yes Yes

viewfinder

Viewfinder mirror Translucent Opaque
Viewfinder Yes Yes
Type Electronic Pentamirror
Coverage 100% 95%
Magnification 1x 0.87x
Viewfinder size 0.65x 0.54x

performance

Max continuous shooting 8 fps 3.7 fps
Battery life 690 440
Continuous shooting
3.7 fps, JPEG
8 fps
Focus lag 326 ms 252 ms
Shutter lag 54 ms 96 ms
Startup delay 1,900 ms 400 ms
Sony SLT A58
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Canon EOS 550D
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