Canon 40D versus Canon 30D
The Canon EOS 40D and the Canon EOS 30D are two enthusiast cameras that were officially introduced, respectively, in August 2007 and February 2006. 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 30D provides 8.2 MP.
The side-by-side display below illustrates the physical size and weight of the Canon 40D and the Canon 30D. Three consecutive perspectives from the front, the top, and the back are presented. All width, height and depth measures 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 side – the 40D – represents the basis for the calculations across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon 30D is somewhat smaller (3 percent) than the Canon 40D. Moreover, the 30D is markedly lighter (5 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the 30D are weather-sealed.
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
|Canon 40D (⇒ rgt)||146 mm||108 mm||74 mm||822 g||750||no||2007||1,299||discont.||check|
|Canon 30D (⇒ lft)||144 mm||106 mm||74 mm||785 g||750||no||2006||1,399||discont.||check|
|Canon 70D (⇒ lft | rgt)||139 mm||104 mm||79 mm||755 g||920||YES||2013||1,199||discont.||check|
|Canon 60D (⇒ lft | rgt)||145 mm||106 mm||79 mm||755 g||1100||YES||2010||1,399||discont.||check|
|Canon 7D (⇒ lft | rgt)||148 mm||111 mm||74 mm||860 g||800||YES||2009||1,699||discont.||check|
|Canon 50D (⇒ lft | rgt)||146 mm||108 mm||74 mm||822 g||800||YES||2008||1,299||discont.||check|
|Canon XSi (⇒ lft | rgt)||129 mm||98 mm||62 mm||524 g||500||no||2008||799||discont.||check|
|Canon XTi (⇒ lft | rgt)||127 mm||84 mm||65 mm||556 g||370||no||2006||799||discont.||check|
|Canon XT (⇒ lft | rgt)||127 mm||94 mm||64 mm||540 g||400||no||2005||899||discont.||check|
|Canon 20D (⇒ lft | rgt)||144 mm||106 mm||72 mm||770 g||700||no||2004||1,499||discont.||check|
|Canon 10D (⇒ lft | rgt)||150 mm||107 mm||75 mm||850 g||500||no||2003||1,999||discont.||check|
|Nikon D90 (⇒ lft | rgt)||132 mm||103 mm||77 mm||703 g||850||no||2008||1,299||discont.||check|
|Olympus E-30 (⇒ lft | rgt)||142 mm||108 mm||75 mm||701 g||750||no||2008||1,299||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 40D was somewhat cheaper (by 7 percent) than the 30D 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.
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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the 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 30D 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.
Despite having a slightly smaller sensor, the Canon 40D offers a higher resolution of 10.1 megapixel, compared with 8.2 MP of the Canon 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 5.73μm versus 6.42μm for the 30D). However, it should be noted that the 40D is a somewhat more recent model (by 1 year and 5 months) than the 30D, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.
For most cameras, data on sensor performance has been reported by DXO Mark. 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 review, the 40D has a notably higher overall DXO score than the 30D (overall score 5 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.6 bits higher color depth, 0.5 EV in additional dynamic range, 0.1 stops of reduced 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.
|Canon 40D (⇒ rgt)||APS-C||10.1||3888||2592||no||22.1||11.3||703||64|
|Canon 30D (⇒ lft)||APS-C||8.2||3504||2336||no||21.5||10.8||736||59|
|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 7D (⇒ lft | rgt)||APS-C||17.9||5184||3456||1080/30p||22.0||11.7||854||66|
|Canon 50D (⇒ lft | rgt)||APS-C||15.1||4752||3168||no||21.8||11.4||696||63|
|Canon XSi (⇒ lft | rgt)||APS-C||12.2||4272||2848||no||21.9||10.8||692||61|
|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 D90 (⇒ lft | rgt)||APS-C||12.2||4288||2848||720/24p||22.7||12.5||977||73|
|Olympus E-30 (⇒ lft | rgt)||Four Thirds||12.2||4032||3024||no||21.3||10.4||530||55|
Apart from body and sensor, cameras can and do differ across a range of features. The 40D and the 30D 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 30D, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.
|Canon 40D (⇒ rgt)||optical||YES||3.0||230||fixed||no||8000||6.5||12||no|
|Canon 30D (⇒ lft)||optical||YES||2.5||230||fixed||no||8000||5.0||13||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 7D (⇒ lft | rgt)||optical||YES||3.0||920||fixed||no||8000||8.0||12||no|
|Canon 50D (⇒ lft | rgt)||optical||YES||3.0||920||fixed||no||8000||6.3||13||no|
|Canon XSi (⇒ lft | rgt)||optical||no||3.0||230||fixed||no||4000||3.5||13||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 D90 (⇒ lft | rgt)||optical||YES||3||920||fixed||no||4000||4.5||17||no|
|Olympus E-30 (⇒ lft | rgt)||optical||YES||2.7||230||swivel||no||8000||5.0||13||YES|
Both the 40D and the 30D have been discontinued, but can regularly be found used on ebay. The 30D was replaced by the Canon 40D, while the 40D was followed by the Canon 50D.
So what conclusions can be drawn? Is there a clear favorite between the Canon 40D and the Canon 40D? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Canon EOS 40D:
- More detail: Offers more megapixels (10.1 vs 8.2MP) with a 11% higher linear resolution.
- Better image quality: Scores markedly higher (5 points) in the DXO overall assessment.
- Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
- Faster burst: Shoots at higher frequency (6.5 vs 5 flaps/sec) to capture the decisive moment.
- More modern: Is somewhat more recent (announced 1 year and 5 months after the 30D).
Reasons to prefer the Canon EOS 30D:
- More heavily discounted: Has been on the market for longer (launched in February 2006).
If the count of relative strengths (bullet points above) is taken as a measure, the 40D is the clear winner of the match-up (5 : 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.
In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 40D and the 30D in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate. 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. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Canon 40D (⇒ rgt)||90/100 HiRec||HiRec||4.5/5||reviewed||4.5/5||2007||1,299||discont.||check|
|Canon 30D (⇒ lft)||87/100 HiRec||HiRec||reviewed||reviewed||-||2006||1,399||discont.||check|
|Canon 70D (⇒ lft | rgt)||HiRec||83/100 Gold||4.5/5||4.5/5||5/5||2013||1,199||discont.||check|
|Canon 60D (⇒ lft | rgt)||87/100 Rec||79/100 Silver||4/5||5/5||4.5/5||2010||1,399||discont.||check|
|Canon 7D (⇒ lft | rgt)||93/100 HiRec||84/100||4.5/5||5/5||4.5/5||2009||1,699||discont.||check|
|Canon 50D (⇒ lft | rgt)||90/100 HiRec||HiRec||4.5/5||5/5||4.5/5||2008||1,299||discont.||check|
|Canon XSi (⇒ lft | rgt)||88/100 HiRec||HiRec||4/5||5/5||4.5/5||2008||799||discont.||check|
|Canon XTi (⇒ lft | rgt)||85/100 HiRec||HiRec||reviewed||4.5/5||4/5||2006||799||discont.||check|
|Canon XT (⇒ lft | rgt)||80/100||HiRec||reviewed||reviewed||-||2005||899||discont.||check|
|Canon 20D (⇒ lft | rgt)||-||HiRec||-||reviewed||-||2004||1,499||discont.||check|
|Canon 10D (⇒ lft | rgt)||-||HiRec||-||reviewed||-||2003||1,999||discont.||check|
|Nikon D90 (⇒ lft | rgt)||89/100 HiRec||HiRec||4/5||5/5||4.5/5||2008||1,299||discont.||check|
|Olympus E-30 (⇒ lft | rgt)||-||71/100 HiRec||4.5/5||-||4/5||2008||1,299||discont.||check|
Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
In case you would like to check on the differences and similarities of other camera models, just use the search menu below. 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, kindly get in touch, and I will try to locate and add the respective data to the application.
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