Camera Rocket Review Our evaluation of 550D vs 40D

Image Quality

RAW image quality independent of lens

EOS 550D
9.5
EOS 40D
9.3
DxOMark Low light, DxOMark Color depth and DxOMark Dynamic range

Focusing

How fast and easily does the camera nail focus

EOS 550D
6.5
EOS 40D
8.4
Focus lag, cross type focus points and focus points

Responsiveness

How much delay is there between you and your photo?

EOS 550D
8.4
EOS 40D
9.2
Focus lag, continuous shooting and Startup delay

Reviews

What do the experts think?

EOS 550D
9.2
EOS 40D
9.3
Reviews from techradar.com, 1001noisycameras.com, trustedreviews.com and 4 more

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

EOS 550D
8.9
EOS 40D
9.2

Winner
Canon EOS 40D 

Camera Rocket recommends the Canon EOS 40D  based on its focusing, responsiveness and reviews.

See full details

Benchmarks Real world tests of EOS 550D vs 40D

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

EOS 550D
784 ISO
EOS 40D
703 ISO

Resolution Results from photos of standard resolution charts

EOS 550D
2,100 LPH
EOS 40D
2,000 LPH

Focus lag Delay between fully pressing shutter to image capture

EOS 550D
252 ms
EOS 40D
128 ms

Shutter lag Delay to take a photo when prefocused

EOS 550D
96 ms
EOS 40D
61 ms

Startup delay Delay from power on to first photo

EOS 550D
400 ms
EOS 40D
400 ms

Continuous shooting Delay between fully pressing shutter to image capture

EOS 550D
3.7 fps
EOS 40D
6.5 fps

Features Key features of the EOS 550D  vs 40D 

Megapixels Maximum resolution images are captured at

EOS 550D
17.9 MP
EOS 40D
10.1 MP

Max ISO Maximum light sensitivity of the sensor

EOS 550D
12,800 ISO
EOS 40D
3,200 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

EOS 550D
0.54x
EOS 40D
0.59x

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

EOS 550D
18.5 microns
EOS 40D
32.6 microns

Reviews Word on the street

EOS 550D  vs 40D 

8.0
9.0
Shooting into the sun with bright reflections off the sea is an exposure nightmare, but the additional dynamic range of the 14-bit RAW mode has coped admirably.
EOS 40D

7.8
7.8
The camera also delivers the best video capture quality I've seen in a sub-$1,000 dSLR-subject to the inescapable limitations the technology, like unusable autofocus-with good exposure, sharpness, minimal artifacts, and excellent audio.
EOS 550D

9.0
8.5
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

Overall

8.4 Out of 10
8.7 Out of 10

Specifications Full list of technical specs

sensor

EOS 550D  vs
40D 
Type CMOS CMOS
Megapixels 17.9 MP 10.1 MP
Resolution 5184 x 3456 3888 x 2592
Size APS-C APS-C
Area 22.3 x 14.9 mm 22.2 x 14.8 mm
Crop factor 1.6x 1.6x
Pixel size 18.5 microns 32.6 microns
Light sensitivity 100 ISO to 6,400 ISO 100 ISO to 1,600 ISO
Light sensitivity (Boost) 6,400 ISO to 12,800 ISO 1,600 ISO to 3,200 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes
Tested vertical resolution 2,100 LPH 2,000 LPH
Tested horizontal resolution 2,100 LPH 2,000 LPH

focus system

Type Phase detection Phase detection
Focus points 9 9
Cross type focus points 1 9

shutter

Min 30 s 30 s
Max 1/4000 s 1/8000 s

form factor

Size 129 x 98 x 62 mm 146 x 108 x 74 mm
Thickness 62 mm 74 mm
Weight 530 g 822 g
Is weather sealed No No

features

Is a smart camera No No
Includes a GPS No No
Supports HDR No No
Automatic panorama No No
Create realistic 3D images No No
Image stabilization

video

EOS 550D  vs
40D 
Video 1920 x 1080 @ 30 fps None
Shoots video in 24p Yes N/A
Shoots high speed video No N/A
External mic jack 3.5mm N/A
Autofocus while shooting video Manual N/A
Autofocus type N/A N/A
Autofocus supports continuous N/A N/A

display

Type LCD LCD
Size 3" 3"
Resolution 1,040 k dots 230 k dots
Has a touch screen No No
Has a flip out screen No No
Supports live view Yes Yes

viewfinder

Viewfinder mirror Opaque Opaque
Viewfinder Yes Yes
Type Pentamirror Pentaprism
Coverage 95% 95%
Magnification 0.87x 0.95x
Viewfinder size 0.54x 0.59x

performance

Max continuous shooting 3.7 fps 6.5 fps
Battery life 440 1,100
Continuous shooting
6.5 fps, JPEG
3.7 fps, JPEG
Focus lag 252 ms 128 ms
Shutter lag 96 ms 61 ms
Startup delay 400 ms 400 ms
Canon EOS 550D
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Canon EOS 40D
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