Canon 40D vs T3i
The Canon EOS 40D and the Canon EOS Rebel T3i (labelled Canon 600D in some countries) are two digital cameras that were revealed to the public, respectively, in August 2007 and February 2011. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The 40D has a resolution of 10.1 megapixels, whereas the T3i provides 17.9 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Canon EOS Rebel T3i? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
The side-by-side display below illustrates the physical size and weight of the Canon 40D and the Canon T3i. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Canon T3i is notably smaller (16 percent) than the Canon 40D. Moreover, the T3i is markedly lighter (31 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the T3i 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 compare the optics available in the Canon EF Lens Catalog.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.
|1.||Canon 40D||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299|
|2.||Canon T3i||133 mm||100 mm||80 mm||570 g||440||n||Feb 2011||599|
|3.||Canon T6s||132 mm||101 mm||78 mm||565 g||440||n||Feb 2015||649|
|4.||Canon T5i||133 mm||100 mm||79 mm||580 g||440||n||Mar 2013||649|
|5.||Canon M||109 mm||66 mm||32 mm||298 g||230||n||Jul 2012||599|
|6.||Canon T4i||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849|
|7.||Canon T3||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449|
|8.||Canon 60D||145 mm||106 mm||79 mm||755 g||1100||Y||Aug 2010||1,399|
|9.||Canon T2i||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|10.||Canon 50D||146 mm||108 mm||74 mm||822 g||800||Y||Aug 2008||1,299|
|11.||Canon XS||126 mm||98 mm||65 mm||502 g||500||n||Jun 2008||449|
|12.||Canon XSi||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799|
|13.||Canon 30D||144 mm||106 mm||74 mm||785 g||750||n||Feb 2006||1,399|
|14.||Canon XTi||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799|
|15.||Canon 20D||144 mm||106 mm||72 mm||770 g||700||n||Aug 2004||1,499|
|16.||Canon 10D||150 mm||107 mm||75 mm||850 g||500||n||Feb 2003||1,999|
|17.||Nikon D90||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The T3i was launched at a markedly lower price (by 54 percent) than the 40D, which puts it into a different market segment. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an APS-C sensor and have a format factor (sometimes also referred to as "crop factor") of 1.6. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Technology-wise, the T3i uses a more advanced image processing engine (DIGIC 4) than the 40D (DIGIC 3), with benefits for noise reduction, color accuracy, and processing speed.
While the two cameras under review share the same sensor size, the T3i offers a higher resolution of 17.9 megapixels, compared with 10.1 MP of the 40D. This megapixels advantage translates into a 33 percent gain in linear resolution. On the other hand, these sensor specs imply that the T3i has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 4.31μm versus 5.73μm for the 40D). However, it should be noted that the T3i is much more recent (by 3 years and 5 months) than the 40D, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size.
The resolution advantage of the Canon T3i implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the T3i for good quality output (200 dots per inch) amounts to 25.9 x 17.3 inches or 65.8 x 43.9 cm, for very good quality (250 dpi) 20.7 x 13.8 inches or 52.7 x 35.1 cm, and for excellent quality (300 dpi) 17.3 x 11.5 inches or 43.9 x 29.3 cm. The corresponding values for the Canon 40D are 19.4 x 13 inches or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inches or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inches or 32.9 x 21.9 cm for excellent quality prints.
The Canon EOS 40D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Canon EOS Rebel T3i are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-12800.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The T3i indeed provides for movie recording, while the 40D does not. The highest resolution format that the T3i can use is 1080/30p.
Apart from body and sensor, cameras can and do differ across a range of features. The 40D and the T3i 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 viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the 40D has a higher magnification than the one of the T3i (0.59x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 40D, the Canon T3i, and comparable cameras.
One feature that is present on the 40D, but is missing on the T3i is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.The T3i has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 40D does not have a selfie-screen.
The 40D writes its imaging data to Compact Flash cards, while the T3i uses SDXC cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon EOS 40D and Canon EOS Rebel T3i and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
Studio photographers will appreciate that the Canon 40D (unlike the T3i) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 40D and the T3i have been discontinued, but can regularly be found used on eBay. The 40D was replaced by the Canon 50D, while the T3i was followed by the Canon T4i. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.
So what is the bottom line? Is there a clear favorite between the Canon 40D and the Canon T3i? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Canon EOS 40D:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.59x vs 0.53x).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (6.5 vs 3.7 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (750 versus 440) on a single battery charge.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More heavily discounted: Has been available for much longer (launched in August 2007).
Reasons to prefer the Canon EOS Rebel T3i:
- More detail: Has more megapixels (17.9 vs 10.1MP), which boosts linear resolution by 33%.
- Better jpgs: Has a more modern image processing engine (DIGIC 4 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 a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- More compact: Is smaller (133x100mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 252g or 31 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
- More modern: Reflects 3 years and 5 months of technical progress since the 40D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the T3i emerges as the winner of the match-up (10 : 7 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 when reflecting and deciding on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Canon 40D and the Canon T3i place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing whether the two cameras rank among the cream of the crop.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the 40D or the T3i perform in practice. 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 where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|1.||Canon 40D||..||+ +||+ +||4.5/5||4.5/5||Aug 2007||1,299|
|2.||Canon T3i||3/5||o||77/100||4.5/5||4.5/5||Feb 2011||599|
|3.||Canon T6s||5/5||+||77/100||4.5/5||4.5/5||Feb 2015||649|
|4.||Canon T5i||..||..||76/100||4.5/5||4.5/5||Mar 2013||649|
|5.||Canon M||3/5||+||..||4/5||4/5||Jul 2012||599|
|6.||Canon T4i||4/5||+ +||77/100||4.5/5||4.5/5||Jun 2012||849|
|7.||Canon T3||..||80/100||69/100||4/5||4.5/5||Feb 2011||449|
|8.||Canon 60D||5/5||+||79/100||4/5||4.5/5||Aug 2010||1,399|
|9.||Canon T2i||..||+ +||77/100||4/5||4.5/5||Feb 2010||699|
|10.||Canon 50D||..||+ +||+ +||4.5/5||4.5/5||Aug 2008||1,299|
|11.||Canon XS||..||82/100||+ +||3.5/5||4.5/5||Jun 2008||449|
|12.||Canon XSi||..||+ +||+ +||4/5||4.5/5||Jan 2008||799|
|13.||Canon 30D||..||+ +||+ +||o||..||Feb 2006||1,399|
|14.||Canon XTi||..||+ +||+ +||o||4/5||Aug 2006||799|
|15.||Canon 20D||..||..||+ +||..||..||Aug 2004||1,499|
|16.||Canon 10D||..||..||+ +||..||..||Feb 2003||1,999|
|17.||Nikon D90||..||+ +||+ +||4/5||4.5/5||Aug 2008||1,299|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings are only valid when referring 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 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.
Other camera comparisons
Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Canon 40D vs Canon T3i
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Canon 40D||Canon T3i|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Canon EF mount lenses|
|Launch Date||August 2007||February 2011|
|Launch Price||USD 1,299||USD 599|
|Sensor Specs||Canon 40D||Canon T3i|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||22.3 x 14.9 mm|
|Sensor Area||332.27 mm2||332.27 mm2|
|Sensor Diagonal||26.8 mm||26.8 mm|
|Sensor Resolution||10.1 Megapixels||17.9 Megapixels|
|Image Resolution||3888 x 2592 pixels||5184 x 3456 pixels|
|Pixel Pitch||5.73 μm||4.31 μm|
|Pixel Density||3.03 MP/cm2||5.39 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/30p Video|
|ISO Setting||100 - 1,600 ISO||100 - 6,400 ISO|
|ISO Boost||100 - 3,200 ISO||100 - 12,800 ISO|
|Image Processor||DIGIC 3||DIGIC 4|
|DXO Sensor Quality (score)||64||65|
|DXO Color Depth (bits)||22.1||22.1|
|DXO Dynamic Range (EV)||11.3||11.5|
|DXO Low Light (ISO)||703||793|
|Screen Specs||Canon 40D||Canon T3i|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||95%|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||230k dots||1040k dots|
|LCD Attachment||Fixed screen||Swivel screen|
|Shooting Specs||Canon 40D||Canon T3i|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||6.5 shutter flaps/s||3.7 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||100 000 actuations|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||CF cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon 40D||Canon T3i|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 40D||Canon T3i|
|Battery Life (CIPA)||750 shots per charge||440 shots per charge|
146 x 108 x 74 mm
(5.7 x 4.3 x 2.9 in)
133 x 100 x 80 mm
(5.2 x 3.9 x 3.1 in)
|Camera Weight||822 g (29.0 oz)||570 g (20.1 oz)|
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