Canon 40D vs XSi
The Canon EOS 40D and the Canon EOS Rebel XSi (labelled Canon 450D in some countries) are two digital cameras that were revealed to the public, respectively, in August 2007 and January 2008. 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 XSi provides 12.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Canon 40D||Canon XSi|
|Digital single lens reflex||Digital single lens reflex|
|Canon EF mount lenses||Canon EF mount lenses|
|10.1 MP, APS-C Sensor||12.2 MP, APS-C Sensor|
|no Video||no Video|
|ISO 100-1600 (100-3200)||ISO 100-1600|
|Optical viewfinder||Optical viewfinder|
|3.0" LCD, 230k dots||3.0" LCD, 230k dots|
|Fixed screen (not touch-sensitive)||Fixed screen (not touch-sensitive)|
|6.5 shutter flaps per second||3.5 shutter flaps per second|
|750 shots per battery charge||500 shots per battery charge|
|146 x 108 x 74 mm, 822 g||129 x 98 x 62 mm, 524 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Canon EOS Rebel XSi? 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.
Body comparison: Canon 40D vs XSi
The side-by-side display below illustrates the physical size and weight of the Canon 40D and the Canon XSi. 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 measures 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 XSi is notably smaller (20 percent) than the Canon 40D. Moreover, the XSi is substantially lighter (36 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the XSi 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 following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.
|Canon 40D»||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299||-||Canon 40D|
|Canon XSi«||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799||-||Canon XSi|
|Canon 70D« »||139 mm||104 mm||79 mm||755 g||920||Y||Jul 2013||1,199||-||Canon 70D|
|Canon T4i« »||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849||-||Canon T4i|
|Canon 1100D« »||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449||-||Canon 1100D|
|Canon T3« »||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449||-||Canon T3|
|Canon 60D« »||145 mm||106 mm||79 mm||755 g||1100||Y||Aug 2010||1,399||-||Canon 60D|
|Canon T1i« »||129 mm||98 mm||62 mm||520 g||400||n||Mar 2009||799||-||Canon T1i|
|Canon 50D« »||146 mm||108 mm||74 mm||822 g||800||Y||Aug 2008||1,299||-||Canon 50D|
|Canon 450D« »||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799||-||Canon 450D|
|Canon 30D« »||144 mm||106 mm||74 mm||785 g||750||n||Feb 2006||1,399||-||Canon 30D|
|Canon 400D« »||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799||-||Canon 400D|
|Canon XTi« »||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799||-||Canon XTi|
|Canon 20D« »||144 mm||106 mm||72 mm||770 g||700||n||Aug 2004||1,499||-||Canon 20D|
|Nikon D90« »||132 mm||103 mm||77 mm||703 g||850||n||Aug 2008||1,299||-||Nikon D90|
|Olympus E-30« »||142 mm||108 mm||75 mm||701 g||750||n||Nov 2008||1,299||-||Olympus E-30|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The XSi was launched at a markedly lower price (by 38 percent) than the 40D, which puts it into a different market segment. 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 XSi
The size of the imaging sensor is a crucial determinant 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the XSi is 1 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.
Despite having a slightly smaller sensor, the XSi offers a higher resolution of 12.2 megapixels, compared with 10.1 MP of the 40D. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 5.19μm versus 5.73μm for the 40D). However, it should be noted that the XSi is a somewhat more recent model (by 5 months) than the 40D, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.
The resolution advantage of the Canon XSi implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the XSi for good quality output (200 dots per inch) amounts to 21.4 x 14.2 inch or 54.3 x 36.2 cm, for very good quality (250 dpi) 17.1 x 11.4 inch or 43.4 x 28.9 cm, and for excellent quality (300 dpi) 14.2 x 9.5 inch or 36.2 x 24.1 cm. The corresponding values for the Canon 40D are 19.4 x 13 inch or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inch or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inch 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 XSi are ISO 100 to ISO 1600 (no boost).
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|Canon 40D»||APS-C||10.1||3888||2592||-||22.1||11.3||703||64||Canon 40D|
|Canon XSi«||APS-C||12.2||4272||2848||-||21.9||10.8||692||61||Canon XSi|
|Canon 70D« »||APS-C||20.0||5472||3648||1080/30p||22.5||11.6||926||68||Canon 70D|
|Canon T4i« »||APS-C||17.9||5184||3456||1080/30p||21.7||11.2||722||62||Canon T4i|
|Canon 1100D« »||APS-C||12.2||4272||2848||720/30p||21.9||11.0||755||62||Canon 1100D|
|Canon T3« »||APS-C||12.2||4272||2848||720/30p||21.9||11.0||755||62||Canon T3|
|Canon 60D« »||APS-C||17.9||5184||3456||1080/30p||22.2||11.5||813||66||Canon 60D|
|Canon T1i« »||APS-C||15.1||4752||3168||1080/20p||21.7||11.5||663||63||Canon T1i|
|Canon 50D« »||APS-C||15.1||4752||3168||-||21.8||11.4||696||63||Canon 50D|
|Canon 450D« »||APS-C||12.2||4272||2848||-||21.9||10.8||692||61||Canon 450D|
|Canon 30D« »||APS-C||8.2||3504||2336||-||21.5||10.8||736||59||Canon 30D|
|Canon 400D« »||APS-C||10.1||3888||2592||-||22.1||11.0||664||62||Canon 400D|
|Canon XTi« »||APS-C||10.1||3888||2592||-||22.1||11.0||664||62||Canon XTi|
|Canon 20D« »||APS-C||8.2||3504||2336||-||21.9||11.0||721||62||Canon 20D|
|Nikon D90« »||APS-C||12.2||4288||2848||720/24p||22.7||12.5||977||73||Nikon D90|
|Olympus E-30« »||Four Thirds||12.2||4032||3024||-||21.3||10.4||530||55||Olympus E-30|
Feature comparison: Canon 40D vs XSi
Apart from body and sensor, cameras can and do differ across a variety of features. The 40D and the XSi 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 XSi (0.59x vs 0.54x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Canon 40D and Canon XSi in connection with corresponding information for a sample of similar cameras.
|Canon 40D»||optical||Y||3.0||230||fixed||n||1/8000s||6.5||Y||n||Canon 40D|
|Canon XSi«||optical||n||3.0||230||fixed||n||1/4000s||3.5||Y||n||Canon XSi|
|Canon 70D« »||optical||Y||3.0||1040||swivel||Y||1/8000s||7.0||Y||n||Canon 70D|
|Canon T4i« »||optical||n||3.0||1040||swivel||Y||1/4000s||5.0||Y||n||Canon T4i|
|Canon 1100D« »||optical||n||2.7||230||fixed||n||1/4000s||3.0||Y||n||Canon 1100D|
|Canon T3« »||optical||n||2.7||230||fixed||n||1/4000s||3.0||Y||n||Canon T3|
|Canon 60D« »||optical||Y||3.0||1040||swivel||n||1/8000s||5.3||Y||n||Canon 60D|
|Canon T1i« »||optical||n||3.0||920||fixed||n||1/4000s||3.4||Y||n||Canon T1i|
|Canon 50D« »||optical||Y||3.0||920||fixed||n||1/8000s||6.3||Y||n||Canon 50D|
|Canon 450D« »||optical||n||3.0||230||fixed||n||1/4000s||3.5||Y||n||Canon 450D|
|Canon 30D« »||optical||Y||2.5||230||fixed||n||1/8000s||5.0||Y||n||Canon 30D|
|Canon 400D« »||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Canon 400D|
|Canon XTi« »||optical||n||2.5||230||fixed||n||1/4000s||3.0||Y||n||Canon XTi|
|Canon 20D« »||optical||Y||1.8||118||fixed||n||1/8000s||5.0||Y||n||Canon 20D|
|Nikon D90« »||optical||Y||3.0||920||fixed||n||1/4000s||4.5||Y||n||Nikon D90|
|Olympus E-30« »||optical||Y||2.7||230||swivel||n||1/8000s||5.0||Y||Y||Olympus E-30|
One feature that is present on the 40D, but is missing on the XSi 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 40D writes its imaging data to Compact Flash cards, while the XSi uses SDHC cards.
Connectivity comparison: Canon 40D vs XSi
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 XSi and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Canon 40D»||Y||-||-||-||-||-||2.0||-||-||-||Canon 40D|
|Canon XSi«||Y||-||-||-||-||mini||2.0||-||-||-||Canon XSi|
|Canon 70D« »||Y||stereo||mono||Y||-||mini||2.0||Y||-||-||Canon 70D|
|Canon T4i« »||Y||stereo||mono||Y||-||mini||2.0||-||-||-||Canon T4i|
|Canon 1100D« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Canon 1100D|
|Canon T3« »||Y||stereo||mono||-||-||mini||2.0||-||-||-||Canon T3|
|Canon 60D« »||Y||mono||mono||Y||-||mini||2.0||-||-||-||Canon 60D|
|Canon T1i« »||Y||mono||mono||-||-||mini||2.0||-||-||-||Canon T1i|
|Canon 50D« »||Y||-||-||-||-||mini||2.0||-||-||-||Canon 50D|
|Canon 450D« »||Y||-||-||-||-||mini||2.0||-||-||-||Canon 450D|
|Canon 30D« »||Y||-||-||-||-||-||2.0||-||-||-||Canon 30D|
|Canon 400D« »||Y||-||-||-||-||-||2.0||-||-||-||Canon 400D|
|Canon XTi« »||Y||-||-||-||-||-||2.0||-||-||-||Canon XTi|
|Canon 20D« »||Y||-||-||-||-||-||1.1||-||-||-||Canon 20D|
|Nikon D90« »||Y||mono||mono||-||-||mini||2.0||-||-||-||Nikon D90|
|Olympus E-30« »||Y||-||-||-||-||-||2.0||-||-||-||Olympus E-30|
Studio photographers will appreciate that the Canon 40D (unlike the XSi) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the 40D and the XSi have been discontinued, but can regularly be found used on eBay. The 40D was replaced by the Canon 50D, while the XSi was followed by the Canon T1i. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon website.
Review summary: Canon 40D vs XSi
So what is the bottom line? Which of the two cameras – the Canon 40D or the Canon XSi – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Advantages of the Canon EOS 40D:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.59x vs 0.54x).
- 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 3.5 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (750 versus 500) 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 on the market for longer (launched in August 2007).
Arguments in favor of the Canon EOS Rebel XSi:
- More detail: Has more megapixels (12.2 vs 10.1MP), which boosts linear resolution by 10%.
- More compact: Is smaller (129x98mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 298g or 36 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (38 percent cheaper at launch).
- More modern: Was introduced somewhat (5 months) more recently.
If the count of individual advantages (bullet points above) is taken as a guide, the 40D emerges as the winner of the contest (7 : 5 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 sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 XSi 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 40D or the XSi. 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.
Expert reviews: Canon 40D vs XSi
This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Canon 40D»||+ +||+ +||4.5/5||o||4.5/5||Aug 2007||1,299||-||Canon 40D|
|Canon XSi«||+ +||+ +||4/5||5/5||4.5/5||Jan 2008||799||-||Canon XSi|
|Canon 70D« »||+ +||83/100||4.5/5||4.5/5||5/5||Jul 2013||1,199||-||Canon 70D|
|Canon T4i« »||+ +||77/100||4.5/5||4.5/5||4.5/5||Jun 2012||849||-||Canon T4i|
|Canon 1100D« »||80/100||69/100||4/5||4/5||4.5/5||Feb 2011||449||-||Canon 1100D|
|Canon T3« »||80/100||69/100||4/5||4/5||4.5/5||Feb 2011||449||-||Canon T3|
|Canon 60D« »||+||79/100||4/5||5/5||4.5/5||Aug 2010||1,399||-||Canon 60D|
|Canon T1i« »||+ +||74/100||4.5/5||5/5||4.5/5||Mar 2009||799||-||Canon T1i|
|Canon 50D« »||+ +||+ +||4.5/5||5/5||4.5/5||Aug 2008||1,299||-||Canon 50D|
|Canon 450D« »||+ +||+ +||4/5||5/5||4.5/5||Jan 2008||799||-||Canon 450D|
|Canon 30D« »||+ +||+ +||o||o||-||Feb 2006||1,399||-||Canon 30D|
|Canon 400D« »||+ +||+ +||o||4.5/5||4/5||Aug 2006||799||-||Canon 400D|
|Canon XTi« »||+ +||+ +||o||4.5/5||4/5||Aug 2006||799||-||Canon XTi|
|Canon 20D« »||-||+ +||-||o||-||Aug 2004||1,499||-||Canon 20D|
|Nikon D90« »||+ +||+ +||4/5||5/5||4.5/5||Aug 2008||1,299||-||Nikon D90|
|Olympus E-30« »||-||71/100||4.5/5||-||4/5||Nov 2008||1,299||-||Olympus E-30|
|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. Thus, a score needs to be put into the context of the launch date and the launch price 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
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 XSi
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 XSi|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Canon EF mount lenses|
|Launch Date||August 2007||January 2008|
|Launch Price||USD 1299||USD 799|
|Sensor Specs||Canon 40D||Canon XSi|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.3 x 14.9 mm||22.2 x 14.8 mm|
|Sensor Area||332.27 mm2||328.56 mm2|
|Sensor Diagonal||26.8 mm||26.7 mm|
|Sensor Resolution||10.1 Megapixels||12.2 Megapixels|
|Image Resolution||3888 x 2592 pixels||4272 x 2848 pixels|
|Pixel Pitch||5.73 μm||5.19 μm|
|Pixel Density||3.03 MP/cm2||3.70 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||no Video|
|ISO Setting||100-1600 ISO||100-1600 ISO|
|ISO Boost||100-3200 ISO||no Enhancement|
|Image Processor||DIGIC 3||DIGIC 3|
|DXO Sensor Quality (score)||64||61|
|DXO Color Depth (bits)||22.1||21.9|
|DXO Dynamic Range (EV)||11.3||10.8|
|DXO Low Light (ISO)||703||692|
|Screen Specs||Canon 40D||Canon XSi|
|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||3.0 inch||3.0 inch|
|LCD Resolution||230k dots||230k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon 40D||Canon XSi|
|Autofocus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||6.5 shutter flaps/s||3.5 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||100 000 actuations|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||CF cards||SDHC cards|
|Second Storage Option||Single card slot||Single card slot|
|Connectivity Specs||Canon 40D||Canon XSi|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon 40D||Canon XSi|
|Battery Type||BP-511A power pack||LP-E5 power pack|
|Battery Life (CIPA)||750 shots per charge||500 shots per charge|
146 x 108 x 74 mm
(5.7 x 4.3 x 2.9 in)
129 x 98 x 62 mm
(5.1 x 3.9 x 2.4 in)
|Camera Weight||822 g (29.0 oz)||524 g (18.5 oz)|
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