Camera Rocket Review Our evaluation of 7D vs 40D

Image Quality

RAW image quality independent of lens

EOS 7D
n.d.
EOS 40D
n.d.
DxOMark Low light, DxOMark Color depth, DxOMark Dynamic range and 1 more

Focusing

How fast and easily does the camera nail focus

EOS 7D
6.6
EOS 40D
5.7
focus points

Responsiveness

How much delay is there between you and your photo?

EOS 7D
10.0
EOS 40D
10.0
continuous shooting

Reviews

What do the experts think?

EOS 7D
9.5
EOS 40D
9.3
Reviews from canonwatch.com, imaging-resource.com, 1001noisycameras.com, dpreview.com and 5 more

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

EOS 7D
9.1
EOS 40D
8.9

Winner
Canon EOS 7D 

Camera Rocket recommends the Canon EOS 7D  based on its focusing and reviews.

See full details

Benchmarks Real world tests of EOS 7D vs 40D

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

EOS 7D
854 ISO
EOS 40D
703 ISO

Resolution Results from photos of standard resolution charts

EOS 7D
2,000 LPH
EOS 40D
2,000 LPH

Focus lag Delay between fully pressing shutter to image capture

EOS 7D
131 ms
EOS 40D
128 ms

Shutter lag Delay to take a photo when prefocused

EOS 7D
61 ms
EOS 40D
61 ms

Startup delay Delay from power on to first photo

EOS 7D
400 ms
EOS 40D
400 ms

Continuous shooting Delay between fully pressing shutter to image capture

EOS 7D
8 fps
EOS 40D
6.5 fps

Features Key features of the EOS 7D  vs 40D 

Megapixels Maximum resolution images are captured at

EOS 7D
17.9 MP
EOS 40D
10.1 MP

Max ISO Maximum light sensitivity of the sensor

EOS 7D
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

EOS 7D
3"
EOS 40D
3"

Viewfinder size Large viewfinders are brighter and more comfortable to use

EOS 7D
0.62x
EOS 40D
0.59x

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

EOS 7D
18.5 microns
EOS 40D
32.6 microns

Reviews Word on the street

EOS 7D  vs 40D 

10.0
9.0
With an 18-megapixel APS-C CMOS sensor and a price tag of £1,500 body-only the 7D hits the mark perfectly.
EOS 7D

8.5
7.8
The higher-resolution sensor necessarily has extremely small pixels, which never bodes well for image quality.
EOS 7D

9.0
8.5
It's also built incredibly well and the video mode, while not perfect, is better than any other HD-DSLR we've seen, thanks to its excellent quality, full manual control and 24p frame rate.
EOS 7D

Overall

8.9 Out of 10
8.7 Out of 10

Specifications Full list of technical specs

sensor

EOS 7D  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) 100 ISO to 12,800 ISO 1,600 ISO to 3,200 ISO
Codecs
RAW
JPEG
CR2
Self cleaning sensor Yes Yes
Tested vertical resolution 2,000 LPH 2,000 LPH
Tested horizontal resolution 2,100 LPH 2,000 LPH

focus system

Type Phase detection Phase detection
Focus points 19 9
Cross type focus points 19 9

shutter

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

form factor

Size 148 x 111 x 74 mm 146 x 108 x 74 mm
Thickness 74 mm 74 mm
Weight 860 g 822 g
Is weather sealed Yes 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 7D  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 920 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 Pentaprism Pentaprism
Coverage 100% 95%
Magnification 1x 0.95x
Viewfinder size 0.62x 0.59x

performance

Max continuous shooting 8 fps 6.5 fps
Battery life 800 1,100
Continuous shooting
6.5 fps, JPEG
8 fps, RAW
Focus lag 131 ms 128 ms
Shutter lag 61 ms 61 ms
Startup delay 400 ms 400 ms
Canon EOS 7D
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Canon EOS 40D
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