Camera Rocket Review Our evaluation of 70D vs 40D

Image Quality

RAW image quality independent of lens

EOS 70D
9.9
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 70D
6.6
EOS 40D
5.7
focus points

Responsiveness

How much delay is there between you and your photo?

EOS 70D
10.0
EOS 40D
10.0
continuous shooting

Reviews

What do the experts think?

EOS 70D
9.5
EOS 40D
9.3
Reviews from canonwatch.com, 1001noisycameras.com, dpreview.com, techradar.com and 2 more

Camera Rocket Score

Image Quality, Focusing, Responsiveness and Reviews

EOS 70D
9.3
EOS 40D
9.0

Winner
Canon EOS 70D 

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

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Benchmarks Real world tests of EOS 70D vs 40D

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

EOS 70D
926 ISO
EOS 40D
703 ISO

Focus lag Delay between fully pressing shutter to image capture

EOS 70D
75 ms
EOS 40D
128 ms

Shutter lag Delay to take a photo when prefocused

EOS 70D
59 ms
EOS 40D
61 ms

Startup delay Delay from power on to first photo

EOS 70D
700 ms
EOS 40D
400 ms

Continuous shooting Delay between fully pressing shutter to image capture

EOS 70D
7 fps
EOS 40D
6.5 fps

Battery life How many photos per battery charge (CIPA)

EOS 70D
920 photos
EOS 40D
1,100 photos

Features Key features of the EOS 70D  vs 40D 

Megapixels Maximum resolution images are captured at

EOS 70D
20 MP
EOS 40D
10.1 MP

Max ISO Maximum light sensitivity of the sensor

EOS 70D
25,600 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 70D
0.59x
EOS 40D
0.59x

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

EOS 70D
16.9 microns
EOS 40D
32.6 microns

Reviews Word on the street

EOS 70D  vs 40D 

8.3
7.8
I was occasionally able to produce sharper images at ISO 1600 by shooting raw, but not always.
EOS 70D

10.0
8.5

Overall

9.0 Out of 10
8.7 Out of 10

Specifications Full list of technical specs

sensor

EOS 70D  vs
40D 
Type CMOS CMOS
Megapixels 20 MP 10.1 MP
Resolution 5472 x 3648 3888 x 2592
Size APS-C APS-C
Area 22.5 x 15 mm 22.2 x 14.8 mm
Crop factor 1.6x 1.6x
Pixel size 16.9 microns 32.6 microns
Light sensitivity 100 ISO to 12,800 ISO 100 ISO to 1,600 ISO
Light sensitivity (Boost) 12,800 ISO to 25,600 ISO 1,600 ISO to 3,200 ISO
Codecs
RAW
JPEG
Self cleaning sensor Yes Yes

focus system

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

viewfinder

Viewfinder mirror Opaque Opaque
Viewfinder Yes Yes
Type Pentaprism Pentaprism
Coverage 98% 95%
Magnification 0.95x 0.95x
Viewfinder size 0.59x 0.59x

performance

Max continuous shooting 7 fps 6.5 fps
Battery life 920 1,100
Continuous shooting
6.5 fps, JPEG
7 fps
Focus lag 75 ms 128 ms
Shutter lag 59 ms 61 ms
Startup delay 700 ms 400 ms

video

EOS 70D  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 Phase detection N/A
Autofocus type Phase detection N/A
Autofocus supports continuous Yes N/A

display

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

shutter

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

form factor

Size 145 x 106 x 79 mm 146 x 108 x 74 mm
Thickness 79 mm 74 mm
Weight 755 g 822 g
Is weather sealed Yes No

features

Is a smart camera No No
Includes a GPS No No
Supports HDR Yes No
Automatic panorama No No
Create realistic 3D images No No
Image stabilization
Canon EOS 70D
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Canon EOS 40D
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