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Canon 40D versus Canon 70D

The Canon EOS 40D and the Canon EOS 70D are two enthusiast cameras that were officially introduced, 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. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.

Body comparison: Canon 40D vs Canon 70D

The physical size and weight of the Canon 40D and the Canon 70D are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter. You can also toggle the display 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 the basis or 100 percent across all the size and weight measures).

Compare Canon 40D vs Canon 70D
Compare 40D versus 70D top
Compare 40D and 70D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 70D is notably smaller (8 percent) than the Canon 40D. Moreover, the 70D is markedly 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.

Concerning battery life, the 40D gets 750 shots out of its BP-511A battery, while the 70D can take 920 images on a single charge of its LP-E6 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon 40D» 5.7 in 4.3 in 2.9 in 29.0 oz 750 n Aug 2007 1,299- i Canon 40D
Canon 70D« 5.5 in 4.1 in 3.1 in 26.6 oz 920 Y Jul 2013 1,199- i Canon 70D
Canon 80D« » 5.5 in 4.1 in 3.1 in 25.8 oz 960 Y Feb 2016 1,199 i i Canon 80D
Canon G3 X« » 4.8 in 3.0 in 4.1 in 25.9 oz 300 Y Jun 2015 999 i i Canon G3 X
Canon 7D II« » 5.9 in 4.4 in 3.1 in 32.1 oz 670 Y Sep 2014 1,799 i i Canon 7D II
Canon 1100D« » 5.1 in 3.9 in 3.1 in 17.5 oz 700 n Feb 2011 449- i Canon 1100D
Canon 60D« » 5.7 in 4.2 in 3.1 in 26.6 oz 1100 Y Aug 2010 1,399- i Canon 60D
Canon 50D« » 5.7 in 4.3 in 2.9 in 29.0 oz 800 Y Aug 2008 1,299- i Canon 50D
Canon 450D« » 5.1 in 3.9 in 2.4 in 18.5 oz 500 n Jan 2008 799- i Canon 450D
Canon 30D« » 5.7 in 4.2 in 2.9 in 27.7 oz 750 n Feb 2006 1,399- i Canon 30D
Canon 400D« » 5.0 in 3.3 in 2.6 in 19.6 oz 370 n Aug 2006 799- i Canon 400D
Canon 20D« » 5.7 in 4.2 in 2.8 in 27.2 oz 700 n Aug 2004 1,499- i Canon 20D
Nikon D7100« » 5.4 in 4.2 in 3.0 in 27.0 oz 950 Y Feb 2013 1,199- i Nikon D7100
Nikon D90« » 5.2 in 4.1 in 3.0 in 24.8 oz 850 n Aug 2008 1,299- i Nikon D90
Olympus E-30« » 5.6 in 4.3 in 3.0 in 24.7 oz 750 n Nov 2008 1,299- i Olympus E-30

Any camera purchase will naturally be influenced heavily by the price. The listed launch 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. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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: Canon 40D vs Canon 70D

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend 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.

Technology-wise, the 70D uses a more advanced image processing engine (DIGIC 5+) than the 40D (DIGIC 3), with benefits for noise reduction, color accuracy, and processing speed.

Canon 40D and Canon 70D sensor measures

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

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
Canon 40D» APS-C 10.1 3888 2592-22.111.370364Canon 40D
Canon 70D« APS-C 20.0 5472 36481080/30p22.511.692668Canon 70D
Canon 80D« » APS-C 24.0 6000 40001080/60p23.613.2113579Canon 80D
Canon G3 X« » 1-inch 20.0 5472 36481080/60p21.412.352163Canon G3 X
Canon 7D II« » APS-C 20.0 5472 36481080/60p22.411.8108270Canon 7D II
Canon 1100D« » APS-C 12.2 4272 2848720/30p21.911.075562Canon 1100D
Canon 60D« » APS-C 17.9 5184 34561080/30p22.211.581366Canon 60D
Canon 50D« » APS-C 15.1 4752 3168-21.811.469663Canon 50D
Canon 450D« » APS-C 12.2 4272 2848-21.910.869261Canon 450D
Canon 30D« » APS-C 8.2 3504 2336-21.510.873659Canon 30D
Canon 400D« » APS-C 10.1 3888 2592-22.111.066462Canon 400D
Canon 20D« » APS-C 8.2 3504 2336-21.911.072162Canon 20D
Nikon D7100« » APS-C 24.0 6000 40001080/60p24.213.7125683Nikon D7100
Nikon D90« » APS-C 12.2 4288 2848720/24p22.712.597773Nikon D90
Olympus E-30« » Four Thirds 12.2 4032 3024-21.310.453055Olympus E-30

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: Canon 40D vs Canon 70D

Beyond body and sensor, cameras can and do differ across a range 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 table below summarizes some of the other core capabilities of the Canon 40D and Canon 70D in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec)
Build-in
Flash
(yes/no)
Build-in
Image
Stab
Camera
Model
Canon 40D»optical Y 3.0 230 fixed n 8000 6.5 Y n Canon 40D
Canon 70D«optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 70D
Canon 80D« »optical Y 3.0 1040 swivel Y 8000 7.0 Y n Canon 80D
Canon G3 X« »- n 3.2 1620 tilting Y 2000 5.9 Y Y Canon G3 X
Canon 7D II« »optical Y 3.0 1040 fixed n 8000 10.0 Y n Canon 7D II
Canon 1100D« »optical n 2.7 230 fixed n 4000 3.0 Y n Canon 1100D
Canon 60D« »optical Y 3.0 1040 swivel n 8000 5.3 Y n Canon 60D
Canon 50D« »optical Y 3.0 920 fixed n 8000 6.3 Y n Canon 50D
Canon 450D« »optical n 3.0 230 fixed n 4000 3.5 Y n Canon 450D
Canon 30D« »optical Y 2.5 230 fixed n 8000 5.0 Y n Canon 30D
Canon 400D« »optical n 2.5 230 fixed n 4000 3.0 Y n Canon 400D
Canon 20D« »optical Y 1.8 118 fixed n 8000 5.0 Y n Canon 20D
Nikon D7100« »optical Y 3.2 1229 fixed n 8000 6.0 Y n Nikon D7100
Nikon D90« »optical Y 3.0 920 fixed n 4000 4.5 Y n Nikon D90
Olympus E-30« »optical Y 2.7 230 swivel n 8000 5.0 Y Y Olympus E-30

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The 70D has a touchscreen, while the 40D has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

The 40D writes its imaging data to Compact Flash cards, while the 70D uses SDXC cards.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
Canon 40D»Y-----2.0---Canon 40D
Canon 70D«YstereomonoY-mini2.0Y--Canon 70D
Canon 80D« »YstereomonoYYmini2.0YY-Canon 80D
Canon G3 X« »YstereomonoYYmini2.0YY-Canon G3 X
Canon 7D II« »YstereomonoYYmini3.0---Canon 7D II
Canon 1100D« »Ystereomono--mini2.0---Canon 1100D
Canon 60D« »YmonomonoY-mini2.0---Canon 60D
Canon 50D« »Y----mini2.0---Canon 50D
Canon 450D« »Y----mini2.0---Canon 450D
Canon 30D« »Y-----2.0---Canon 30D
Canon 400D« »Y-----2.0---Canon 400D
Canon 20D« »Y-----1.1---Canon 20D
Nikon D7100« »YstereomonoYYmini2.0---Nikon D7100
Nikon D90« »Ymonomono--mini2.0---Nikon D90
Olympus E-30« »Y-----2.0---Olympus E-30

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.

Review summary: Canon 40D vs Canon 70D

So what is the bottom line? Is there a clear favorite between the Canon 40D and the Canon 70D? Below is a summary of the relative strengths of each of the two contestants.


Reasons to prefer 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).
  • Better jpgs: Has a more modern image processing engine (DIGIC 5+ vs DIGIC 3).
  • 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 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.
  • Easier file upload: Has wifi build in for automatic backup or image transfer to the web.
  • More modern: Reflects 5 years and 10 months of technical progress since the 40D launch.

If the count of relative strengths (bullet points above) is taken as a measure, the 70D is the clear winner of the contest (12 : 1 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision.

40D 01:12 70D

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the handling experience and imaging performance when actually working with the 40D or the 70D. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable. This is where reviews by experts come in. The adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
Canon 40D»HiRecHiRec4.5/5rev4.5/5 Aug 2007 1,299- i Canon 40D
Canon 70D«HiRec83/1004.5/54.5/55/5 Jul 2013 1,199- i Canon 70D
Canon 80D« »HiRec84/1004.5/54.5/54.5/5 Feb 2016 1,199 i i Canon 80D
Canon G3 X« »Rec-4.5/53.5/54/5 Jun 2015 999 i i Canon G3 X
Canon 7D II« »Rec84/1004/55/54.5/5 Sep 2014 1,799 i i Canon 7D II
Canon 1100D« »80/10069/1004/54/54.5/5 Feb 2011 449- i Canon 1100D
Canon 60D« »Rec79/1004/55/54.5/5 Aug 2010 1,399- i Canon 60D
Canon 50D« »HiRecHiRec4.5/55/54.5/5 Aug 2008 1,299- i Canon 50D
Canon 450D« »HiRecHiRec4/55/54.5/5 Jan 2008 799- i Canon 450D
Canon 30D« »HiRecHiRecrevrev- Feb 2006 1,399- i Canon 30D
Canon 400D« »HiRecHiRecrev4.5/54/5 Aug 2006 799- i Canon 400D
Canon 20D« »-HiRec-rev- Aug 2004 1,499- i Canon 20D
Nikon D7100« »HiRec85/1004.5/55/54.5/5 Feb 2013 1,199- i Nikon D7100
Nikon D90« »HiRecHiRec4/55/54.5/5 Aug 2008 1,299- i Nikon D90
Olympus E-30« »-71/1004.5/5-4/5 Nov 2008 1,299- i Olympus E-30

The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

 

Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If you do not see the camera that you are looking for, kindly get in touch, and I will try to update the database with the necessary infos.

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