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Canon 40D versus Canon 70D

The Canon EOS 40D and the Canon EOS 70D are two enthusiast cameras that were announced, respectively, in August 2007 and July 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The 40D has a resolution of 10.1 megapixel, whereas the 70D provides 20 MP.

Body comparison

The physical size and weight of the Canon 40D and the Canon 70D are illustrated in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth dimensions are rounded to the nearest millimeter. You can also use the toggle button to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the 40D – represents 100 percent across all the size and weight measures).

Canon 40D vs Canon 70D front
40D versus 70D top view
40D and 70D rear side
Body view (40D on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 70D is somewhat smaller (8 percent) than the Canon 40D. Moreover, the 70D is slightly lighter (8 percent) than the 40D. It is noteworthy in this context that the 70D is splash and dust-proof, while the 40D does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can find an overview of suitable optics in the Canon EF Lens Catalog.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Canon 40D (⇒ rgt) 5.7 in 4.3 in 2.9 in 29.0 oz 750 no 2007 1,299discont. check
Canon 70D (⇒ lft) 5.5 in 4.1 in 3.1 in 26.6 oz 920 YES 2013 1,199discont. check
Canon 80D (⇒ lft | rgt) 5.5 in 4.1 in 3.1 in 25.8 oz 960 YES 2016 1,199 latest check
Canon T6i (⇒ lft | rgt) 5.2 in 4.0 in 3.1 in 19.6 oz 440 no 2015 749discont. check
Canon T6s (⇒ lft | rgt) 5.2 in 4.0 in 3.1 in 19.9 oz 440 no 2015 849discont. check
Canon 7D II (⇒ lft | rgt) 5.9 in 4.4 in 3.1 in 32.1 oz 670 YES 2014 1,799 latest check
Canon T5i (⇒ lft | rgt) 5.2 in 3.9 in 3.1 in 20.5 oz 440 no 2013 649discont. check
Canon SL1 (⇒ lft | rgt) 4.6 in 3.6 in 2.7 in 14.4 oz 380 no 2013 549discont. check
Canon G16 (⇒ lft | rgt) 4.3 in 3.0 in 1.6 in 12.6 oz 360 no 2013 549 latest check
Canon 60D (⇒ lft | rgt) 5.7 in 4.2 in 3.1 in 26.6 oz 1100 YES 2010 1,399discont. check
Canon 50D (⇒ lft | rgt) 5.7 in 4.3 in 2.9 in 29.0 oz 800 YES 2008 1,299discont. check
Canon 30D (⇒ lft | rgt) 5.7 in 4.2 in 2.9 in 27.7 oz 750 no 2006 1,399discont. check
Canon 20D (⇒ lft | rgt) 5.7 in 4.2 in 2.8 in 27.2 oz 700 no 2004 1,499discont. check
Panasonic GH1 (⇒ lft | rgt) 4.9 in 3.5 in 1.8 in 13.6 oz .. no 2009 1,499discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 70D was somewhat cheaper (by 8 percent) than the 40D at launch, but both cameras fall into the same price category. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tent to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the 70D is 2 percent bigger. They nevertheless have the same format factor of 1.6. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Canon 40D and Canon 70D sensor measures
Sensor size

With 20MP, the 70D offers a higher resolution than the 40D (10.1MP), but the 70D has smaller individual pixels (pixel pitch of 4.11μm versus 5.73μm for the 40D). Yet, the 70D is a much more recent model (by 5 years and 10 months) than the 40D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.

40D versus 70D MP
Sensor resolution

Consistent information on actual sensor performance is available from DXO Mark for most cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). Of the two cameras under consideration, the 70D has a markedly higher DXO score than the 40D (overall score 4 points higher), which will translate into better image quality. The advantage is based on 0.4 bits higher color depth, 0.3 EV in additional dynamic range, and 0.4 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Canon 40D (⇒ rgt) APS-C 10.1 3888 2592 no 22.1 11.3 703 64
Canon 70D (⇒ lft) APS-C 20.0 5472 3648 1080/30p 22.5 11.6 926 68
Canon 80D (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 23.6 13.2 1135 79
Canon T6i (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 22.7 12.0 919 71
Canon T6s (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/30p 22.6 12.0 915 70
Canon 7D II (⇒ lft | rgt) APS-C 20.0 5472 3648 1080/60p 22.4 11.8 1082 70
Canon T5i (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 21.7 11.2 681 61
Canon SL1 (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 21.8 11.3 843 63
Canon G16 (⇒ lft | rgt) 1/1.7 12.0 4000 3000 1080/60p 21.0 11.7 230 54
Canon 60D (⇒ lft | rgt) APS-C 17.9 5184 3456 1080/30p 22.2 11.5 813 66
Canon 50D (⇒ lft | rgt) APS-C 15.1 4752 3168 no 21.8 11.4 696 63
Canon 30D (⇒ lft | rgt) APS-C 8.2 3504 2336 no 21.5 10.8 736 59
Canon 20D (⇒ lft | rgt) APS-C 8.2 3504 2336 no 21.9 11.0 721 62
Panasonic GH1 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/24p 21.6 11.6 772 64

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The 70D indeed provides for movie recording, while the 40D does not. The highest resolution format that the 70D can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The 40D and the 70D are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The following table reports on some other key feature differences and similarities of the Canon 40D, the Canon 70D, and comparable cameras. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Canon 40D (⇒ rgt) optical YES 3.0 230 fixed no 8000 6.5 12 no
Canon 70D (⇒ lft) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Canon 80D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 no
Canon T6i (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 12 no
Canon T6s (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 4000 5.0 12 no
Canon 7D II (⇒ lft | rgt) optical YES 3.0 1040 fixed no 8000 10.0 11 no
Canon T5i (⇒ lft | rgt) optical no 3.0 1040 swivel YES 4000 5.0 13 no
Canon SL1 (⇒ lft | rgt) optical no 3.0 1040 fixed YES 4000 4.9 9.4 no
Canon G16 (⇒ lft | rgt) optical no 3.0 922 fixed no 4000 2.2 7 no
Canon 60D (⇒ lft | rgt) optical YES 3.0 1040 swivel no 8000 5.3 13 no
Canon 50D (⇒ lft | rgt) optical YES 3.0 920 fixed no 8000 6.3 13 no
Canon 30D (⇒ lft | rgt) optical YES 2.5 230 fixed no 8000 5.0 13 no
Canon 20D (⇒ lft | rgt) optical YES 1.8 118 fixed no 8000 5.0 13 no
Panasonic GH1 (⇒ lft | rgt) 1440 no 3.0 460 swivel no 4000 3.0 10.5 no

Both the 40D and the 70D have been discontinued, but can regularly be found used on ebay. The 40D was replaced by the Canon 50D, while the 70D was followed by the Canon 80D.

Summary

So how do things add up? Is there a clear favorite between the Canon 40D and the Canon 40D? Below is a summary of the relative strengths of each of the two contestants.


Advantages of the Canon EOS 40D:

  • More heavily discounted: Has been available for much longer (launched in August 2007).

Arguments in favor of the Canon EOS 70D:

  • More detail: Has more megapixels (20 vs 10.1MP), which boosts linear resolution by 41%.
  • Better image quality: Scores markedly higher (4 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (0.4 stops ISO advantage).
  • Broader imaging potential: Can capture not only stills but also 1080/30p video.
  • More detailed LCD: Has a higher resolution rear screen (1040k vs 230k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Longer lasting: Gets more shots (920 versus 750) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More modern: Reflects 5 years and 10 months of technical progress since the 40D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the 70D is the clear winner of the contest (10 : 1 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points.

40D 01:10 70D

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the 40D or the 70D. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased. This is why hands-on reviews by experts are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites. You can find the full text of the reviews, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Canon 40D (⇒ rgt) 90/100 HiRec HiRec 4.5/5 reviewed 4.5/5 2007 1,299discont. check
Canon 70D (⇒ lft) HiRec 83/100 Gold 4.5/5 4.5/5 5/5 2013 1,199discont. check
Canon 80D (⇒ lft | rgt) HiRec 84/100 Silver 4.5/5 4.5/5 4.5/5 2016 1,199 latest check
Canon T6i (⇒ lft | rgt) - 75/100 4.5/5 4.5/5 4.5/5 2015 749discont. check
Canon T6s (⇒ lft | rgt) Rec 77/100 Silver 4.5/5 4.5/5 4.5/5 2015 849discont. check
Canon 7D II (⇒ lft | rgt) Rec 84/100 Silver 4/5 5/5 4.5/5 2014 1,799 latest check
Canon T5i (⇒ lft | rgt) - 76/100 Silver 4.5/5 4.5/5 4.5/5 2013 649discont. check
Canon SL1 (⇒ lft | rgt) Rec 78/100 Gold 4/5 4/5 4/5 2013 549discont. check
Canon G16 (⇒ lft | rgt) Rec - 4.5/5 4.5/5 4.5/5 2013 549 latest check
Canon 60D (⇒ lft | rgt) 87/100 Rec 79/100 Silver 4/5 5/5 4.5/5 2010 1,399discont. check
Canon 50D (⇒ lft | rgt) 90/100 HiRec HiRec 4.5/5 5/5 4.5/5 2008 1,299discont. check
Canon 30D (⇒ lft | rgt) 87/100 HiRec HiRec reviewed reviewed - 2006 1,399discont. check
Canon 20D (⇒ lft | rgt) - HiRec - reviewed - 2004 1,499discont. check
Panasonic GH1 (⇒ lft | rgt) 89/100 HiRec 72/100 HiRec 4.5/5 5/5 4.5/5 2009 1,499discont. check

Care should be taken when interpreting the review scores above, though. The ratings are only valid when refering to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

Other comparisons

In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If the camera you are interested in is not available, please send me an email, and I will try to add information on that model to the database.

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