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Canon 30D versus Canon 7D

The Canon EOS 30D and the Canon EOS 7D are two enthusiast cameras that were revealed to the public, respectively, in February 2006 and September 2009. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The 30D has a resolution of 8.2 megapixel, whereas the 7D provides 17.9 MP.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Canon 30D and the Canon 7D. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left side – the 30D – represents the basis for the calculations across all the size and weight measures).

Canon 30D vs Canon 7D front
30D versus 7D top view
30D and 7D rear side
Body view (30D 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 7D is considerably larger (107 percent) than the Canon 30D. Moreover, the 7D is markedly heavier (10 percent) than the 30D. It is noteworthy in this context that the 7D is splash and dust-proof, while the 30D 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 30D (⇒ rgt) 144 mm 106 mm 74 mm 785 g 750 no 2006 1,399discont. check
Canon 7D (⇒ lft) 148 mm 111 mm 74 mm 860 g 800 YES 2009 1,699discont. check
Canon G3 X (⇒ lft | rgt) 123 mm 77 mm 105 mm 733 g 300 YES 2015 999 latest check
Canon 7D II (⇒ lft | rgt) 149 mm 112 mm 78 mm 910 g 670 YES 2014 1,799 latest check
Canon 70D (⇒ lft | rgt) 139 mm 104 mm 79 mm 755 g 920 YES 2013 1,199discont. check
Canon 60D (⇒ lft | rgt) 145 mm 106 mm 79 mm 755 g 1100 YES 2010 1,399discont. check
Canon 50D (⇒ lft | rgt) 146 mm 108 mm 74 mm 822 g 800 YES 2008 1,299discont. check
Canon 40D (⇒ lft | rgt) 146 mm 108 mm 74 mm 822 g 750 no 2007 1,299discont. check
Canon XTi (⇒ lft | rgt) 127 mm 84 mm 65 mm 556 g 370 no 2006 799discont. check
Canon XT (⇒ lft | rgt) 127 mm 94 mm 64 mm 540 g 400 no 2005 899discont. check
Canon 20D (⇒ lft | rgt) 144 mm 106 mm 72 mm 770 g 700 no 2004 1,499discont. check
Canon 10D (⇒ lft | rgt) 150 mm 107 mm 75 mm 850 g 500 no 2003 1,999discont. check
Nikon D80 (⇒ lft | rgt) 132 mm 103 mm 77 mm 668 g 600 no 2006 999discont. check
Nikon D200 (⇒ lft | rgt) 147 mm 113 mm 74 mm 920 g 400 YES 2005 1,699discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 30D was launched at a somewhat lower price (by 18 percent) than the 7D, which makes it more attractive for photographers on a tight budget. 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. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 7D is 2 percent smaller. 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 30D and Canon 7D sensor measures
Sensor size

Despite having a slightly smaller sensor, the 7D offers a higher resolution of 17.9 megapixel, compared with 8.2 MP of the 30D. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.31μm versus 6.42μm for the 30D). However, it should be noted that the 7D is much more recent (by 3 years and 6 months) than the 30D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

30D versus 7D MP
Sensor resolution

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 7D has a markedly higher DXO score than the 30D (overall score 7 points higher), which will translate into better image quality. The advantage is based on 0.5 bits higher color depth, 0.9 EV in additional dynamic range, and 0.2 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 30D (⇒ rgt) APS-C 8.2 3504 2336 no 21.5 10.8 736 59
Canon 7D (⇒ lft) APS-C 17.9 5184 3456 1080/30p 22.0 11.7 854 66
Canon G3 X (⇒ lft | rgt) 1-inch 20.0 5472 3648 1080/60p 21.4 12.3 521 63
Canon 7D II (⇒ lft | rgt) APS-C 20.0 5472 3648 1080/60p 22.4 11.8 1082 70
Canon 70D (⇒ lft | rgt) APS-C 20.0 5472 3648 1080/30p 22.5 11.6 926 68
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 40D (⇒ lft | rgt) APS-C 10.1 3888 2592 no 22.1 11.3 703 64
Canon XTi (⇒ lft | rgt) APS-C 10.1 3888 2592 no 22.1 11.0 664 62
Canon XT (⇒ lft | rgt) APS-C 8.0 3456 2304 no 21.8 10.8 637 60
Canon 20D (⇒ lft | rgt) APS-C 8.2 3504 2336 no 21.9 11.0 721 62
Canon 10D (⇒ lft | rgt) APS-C 6.3 3072 2048 no 21.1 10.9 571 57
Nikon D80 (⇒ lft | rgt) APS-C 10.0 3872 2592 no 22.1 11.2 524 61
Nikon D200 (⇒ lft | rgt) APS-C 10.0 3872 2592 no 22.3 11.5 583 64

Many modern cameras cannot only take still pictures, but also record videos. The 7D indeed provides for movie recording, while the 30D does not. The highest resolution format that the 7D can use is 1080/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The 30D and the 7D 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 30D, the Canon 7D, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.

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 30D (⇒ rgt) optical YES 2.5 230 fixed no 8000 5.0 13 no
Canon 7D (⇒ lft) optical YES 3.0 920 fixed no 8000 8.0 12 no
Canon G3 X (⇒ lft | rgt) no no 3.2 1620 tilting YES 2000 5.9 6.8 YES
Canon 7D II (⇒ lft | rgt) optical YES 3.0 1040 fixed no 8000 10.0 11 no
Canon 70D (⇒ lft | rgt) optical YES 3.0 1040 swivel YES 8000 7.0 12 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 40D (⇒ lft | rgt) optical YES 3.0 230 fixed no 8000 6.5 12 no
Canon XTi (⇒ lft | rgt) optical no 2.5 230 fixed no 4000 3.0 13 no
Canon XT (⇒ lft | rgt) optical no 1.8 115 fixed no 4000 3.0 13 no
Canon 20D (⇒ lft | rgt) optical YES 1.8 118 fixed no 8000 5.0 13 no
Canon 10D (⇒ lft | rgt) optical YES 1.8 118 fixed no 4000 3.0 13 no
Nikon D80 (⇒ lft | rgt) optical no 2.5 230 fixed no 4000 3.0 13 no
Nikon D200 (⇒ lft | rgt) optical YES 2.5 230 fixed no 8000 5.0 12 no

Both the 30D and the 7D have been discontinued, but can regularly be found used on ebay. The 30D was replaced by the Canon 40D, while the 7D was followed by the Canon 7D Mark II.

Summary

So what conclusions can be drawn? Which of the two cameras – the Canon 30D or the Canon 7D – has the upper hand? The listing below highlights the relative strengths of the two models.


Reasons to prefer the Canon EOS 30D:

  • More compact: Is smaller (144x106mm vs 148x111mm) and thus needs less room in the bag.
  • More affordable: Was introduced into a lower priced segment (18 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in February 2006).

Arguments in favor of the Canon EOS 7D:

  • More detail: Has more megapixels (17.9 vs 8.2MP), which boosts linear resolution by 48%.
  • Better image quality: Scores markedly higher (7 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (0.9 EV of extra DR).
  • Broader imaging potential: Can capture not only stills but also 1080/30p video.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (920k vs 230k dots).
  • Faster burst: Shoots at higher frequency (8 vs 5 flaps/sec) to capture the decisive moment.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • More modern: Reflects 3 years and 6 months of technical progress since the 30D launch.

If the count of individual advantages (bullet points above) is taken as a guide, the 7D is the clear winner of the contest (9 : 3 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.

30D 03:09 7D

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the 30D or the 7D handle or perform in practice. 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 why expert reviews are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites. The full reviews are available, 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 30D (⇒ rgt) 87/100 HiRec HiRec reviewed reviewed - 2006 1,399discont. check
Canon 7D (⇒ lft) 93/100 HiRec 84/100 4.5/5 5/5 4.5/5 2009 1,699discont. check
Canon G3 X (⇒ lft | rgt) Rec - 4.5/5 3.5/5 4/5 2015 999 latest check
Canon 7D II (⇒ lft | rgt) Rec 84/100 Silver 4/5 5/5 4.5/5 2014 1,799 latest check
Canon 70D (⇒ lft | rgt) HiRec 83/100 Gold 4.5/5 4.5/5 5/5 2013 1,199discont. 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 40D (⇒ lft | rgt) 90/100 HiRec HiRec 4.5/5 reviewed 4.5/5 2007 1,299discont. check
Canon XTi (⇒ lft | rgt) 85/100 HiRec HiRec reviewed 4.5/5 4/5 2006 799discont. check
Canon XT (⇒ lft | rgt) 80/100 HiRec reviewed reviewed - 2005 899discont. check
Canon 20D (⇒ lft | rgt) - HiRec - reviewed - 2004 1,499discont. check
Canon 10D (⇒ lft | rgt) - HiRec - reviewed - 2003 1,999discont. check
Nikon D80 (⇒ lft | rgt) 86/100 Rec HiRec reviewed 4.5/5 4.5/5 2006 999discont. check
Nikon D200 (⇒ lft | rgt) 91/100 HiRec HiRec reviewed 5/5 - 2005 1,699discont. check

The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date 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 would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored. If the camera you are interested in is not available, please contact me, and I will try to update the database with the necessary infos.

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