Canon XSi vs Pentax K-5
The Canon EOS Rebel XSi (called Canon 450D in some regions) and the Pentax K-5 are two digital cameras that were revealed to the public, respectively, in January 2008 and September 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The Canon has a resolution of 12.2 megapixels, whereas the Pentax provides 16.1 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 Rebel XSi and the Pentax K-5? 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 XSi and the Pentax K-5. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. 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 XSi and the Pentax K-5 are of equal size. However, the K-5 is substantially heavier (45 percent) than the XSi. It is noteworthy in this context that the K-5 is splash and dust-proof, while the XSi 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
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 XSi||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799|
|2.||Pentax K-5||131 mm||97 mm||73 mm||760 g||740||Y||Sep 2010||1,099|
|3.||Canon T6i||132 mm||101 mm||78 mm||555 g||440||n||Feb 2015||749|
|4.||Canon T6s||132 mm||101 mm||78 mm||565 g||440||n||Feb 2015||649|
|5.||Canon T4i||133 mm||100 mm||79 mm||575 g||440||n||Jun 2012||849|
|6.||Canon T3||130 mm||100 mm||78 mm||495 g||700||n||Feb 2011||449|
|7.||Canon T2i||129 mm||98 mm||62 mm||530 g||440||n||Feb 2010||699|
|8.||Canon T1i||129 mm||98 mm||62 mm||520 g||400||n||Mar 2009||799|
|9.||Canon XS||126 mm||98 mm||65 mm||502 g||500||n||Jun 2008||449|
|10.||Canon 40D||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299|
|11.||Canon XTi||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799|
|12.||Canon XT||127 mm||94 mm||64 mm||540 g||400||n||Feb 2005||899|
|13.||Pentax K-3 II||131 mm||100 mm||77 mm||800 g||720||Y||Apr 2015||1,099|
|14.||Pentax K-50||130 mm||97 mm||71 mm||650 g||410||Y||Jun 2013||599|
|15.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|16.||Pentax K-30||130 mm||97 mm||71 mm||650 g||410||Y||May 2012||849|
|17.||Pentax K-5 II||131 mm||97 mm||73 mm||760 g||740||Y||Sep 2012||1,099|
|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 XSi was launched at a markedly lower price (by 27 percent) than the K-5, 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.
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, but their sensors differ slightly in size. The sensor area in the K-5 is 13 percent bigger. As a result of these sensor size differences, the cameras have format factors, respectively, of 1.6 (XSi) and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 16.1MP, the K-5 offers a higher resolution than the XSi (12.2MP), but the K-5 has smaller individual pixels (pixel pitch of 4.81μm versus 5.19μm for the XSi). Yet, the K-5 is a much more recent model (by 2 years and 7 months) than the XSi, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units.
The resolution advantage of the Pentax K-5 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-5 for good quality output (200 dots per inch) amounts to 24.6 x 16.3 inches or 62.6 x 41.5 cm, for very good quality (250 dpi) 19.7 x 13.1 inches or 50.1 x 33.2 cm, and for excellent quality (300 dpi) 16.4 x 10.9 inches or 41.7 x 27.6 cm. The corresponding values for the Canon XSi are 21.4 x 14.2 inches or 54.3 x 36.2 cm for good quality, 17.1 x 11.4 inches or 43.4 x 28.9 cm for very good quality, and 14.2 x 9.5 inches or 36.2 x 24.1 cm for excellent quality prints.
The Canon EOS Rebel XSi has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Pentax K-5 are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 80-51200.
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. Of the two cameras under consideration, the K-5 offers substantially better image quality than the XSi (overall score 21 points higher). The advantage is based on 1.8 bits higher color depth, 3.3 EV in additional dynamic range, and 0.7 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|13.||Pentax K-3 II||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80|
|17.||Pentax K-5 II||APS-C||16.1||4928||3264||1080/25p||23.8||14.1||1235||82|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The K-5 indeed provides for movie recording, while the XSi does not. The highest resolution format that the K-5 can use is 1080/25p.
Apart from body and sensor, cameras can and do differ across a range of features. The XSi and the K-5 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 viewfinder in the K-5 offers a wider field of view (100%) than the one in the XSi (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the K-5 has a higher magnification (0.61x vs 0.54x), 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 XSi, the Pentax K-5, and comparable cameras.
|13.||Pentax K-3 II||optical||Y||3.2||1037||fixed||n||1/8000s||8.3||n||Y|
|17.||Pentax K-5 II||optical||Y||3.0||921||fixed||n||1/8000s||7.0||Y||Y|
One feature that differentiates the K-5 and the XSi is in-body image stabilization (IBIS). The K-5 reduces the risk of handshake-induced blur with all attached lenses, while the XSi offers no blur reduction with lenses that themselves do not provide optical image stabilization.
The Pentax K-5 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The XSi writes its imaging data to SDHC cards, while the K-5 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 Rebel XSi and Pentax K-5 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|13.||Pentax K-3 II||Y||mono||mono||Y||Y||mini||3.0||-||-||-|
|17.||Pentax K-5 II||Y||stereo||mono||Y||-||mini||2.0||-||-||-|
Studio photographers will appreciate that the Pentax K-5 (unlike the XSi) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the XSi and the K-5 have been discontinued, but can regularly be found used on eBay. The XSi was replaced by the Canon T1i, while the K-5 was followed by the Pentax K-5 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Pentax websites.
So what is the bottom line? Is there a clear favorite between the Canon XSi and the Pentax K-5? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Canon EOS Rebel XSi:
- Less heavy: Is lighter (by 236g or 31 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced category (27 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in January 2008).
Reasons to prefer the Pentax K-5:
- More detail: Has more megapixels (16.1 vs 12.2MP), which boosts linear resolution by 15%.
- Better image quality: Scores substantially higher (21 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.8 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (3.3 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (0.7 stops ISO advantage).
- Broader imaging potential: Can capture not only stills but also 1080/25p video.
- More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.61x vs 0.54x).
- Easier setting verification: Features a control panel on top to check shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (7 vs 3.5 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Gets more shots (740 versus 500) out of a single battery charge.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More modern: Reflects 2 years and 7 months of technical progress since the XSi launch.
If the count of individual advantages (bullet points above) is taken as a guide, the K-5 is the clear winner of the contest (18 : 3 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 XSi and the Pentax K-5 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 XSi or the K-5 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 XSi||..||+ +||+ +||4/5||4.5/5||Jan 2008||799|
|2.||Pentax K-5||4/5||..||83/100||5/5||4.5/5||Sep 2010||1,099|
|3.||Canon T6i||5/5||..||75/100||4.5/5||4.5/5||Feb 2015||749|
|4.||Canon T6s||5/5||+||77/100||4.5/5||4.5/5||Feb 2015||649|
|5.||Canon T4i||4/5||+ +||77/100||4.5/5||4.5/5||Jun 2012||849|
|6.||Canon T3||..||80/100||69/100||4/5||4.5/5||Feb 2011||449|
|7.||Canon T2i||..||+ +||77/100||4/5||4.5/5||Feb 2010||699|
|8.||Canon T1i||..||+ +||74/100||4.5/5||4.5/5||Mar 2009||799|
|9.||Canon XS||..||82/100||+ +||3.5/5||4.5/5||Jun 2008||449|
|10.||Canon 40D||..||+ +||+ +||4.5/5||4.5/5||Aug 2007||1,299|
|11.||Canon XTi||..||+ +||+ +||o||4/5||Aug 2006||799|
|12.||Canon XT||..||80/100||+ +||o||..||Feb 2005||899|
|13.||Pentax K-3 II||4.5/5||..||..||5/5||5/5||Apr 2015||1,099|
|14.||Pentax K-50||5/5||..||..||5/5||4.5/5||Jun 2013||599|
|15.||Pentax K-3||4/5||..||83/100||5/5||5/5||Oct 2013||1,299|
|16.||Pentax K-30||4/5||..||78/100||4.5/5||4.5/5||May 2012||849|
|17.||Pentax K-5 II||5/5||..||80/100||5/5||4.5/5||Sep 2012||1,099|
|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 XSi vs Pentax K-5
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 XSi||Pentax K-5|
|Camera Type||Digital single lens reflex||Digital single lens reflex|
|Camera Lens||Canon EF mount lenses||Pentax K mount lenses|
|Launch Date||January 2008||September 2010|
|Launch Price||USD 799||USD 1,099|
|Sensor Specs||Canon XSi||Pentax K-5|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||22.2 x 14.8 mm||23.7 x 15.7 mm|
|Sensor Area||328.56 mm2||372.09 mm2|
|Sensor Diagonal||26.7 mm||28.4 mm|
|Sensor Resolution||12.2 Megapixels||16.1 Megapixels|
|Image Resolution||4272 x 2848 pixels||4928 x 3264 pixels|
|Pixel Pitch||5.19 μm||4.81 μm|
|Pixel Density||3.70 MP/cm2||4.32 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/25p Video|
|ISO Setting||100 - 1,600 ISO||100 - 12,800 ISO|
|ISO Boost||no Enhancement||80 - 51,200 ISO|
|Image Processor||DIGIC 3||PRIME II|
|DXO Sensor Quality (score)||61||82|
|DXO Color Depth (bits)||21.9||23.7|
|DXO Dynamic Range (EV)||10.8||14.1|
|DXO Low Light (ISO)||692||1162|
|Screen Specs||Canon XSi||Pentax K-5|
|Viewfinder Type||Optical viewfinder||Optical viewfinder|
|Viewfinder Field of View||95%||100%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||230k dots||921k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon XSi||Pentax K-5|
|Focus System||Phase-detect AF||Phase-detect AF|
|Continuous Shooting||3.5 shutter flaps/s||7 shutter flaps/s|
|Shutter Life Expectancy||100 000 actuations||100 000 actuations|
|Time-Lapse Photography||no Intervalometer||Intervalometer built-in|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||SDHC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||no|
|Connectivity Specs||Canon XSi||Pentax K-5|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon XSi||Pentax K-5|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||500 shots per charge||740 shots per charge|
129 x 98 x 62 mm
(5.1 x 3.9 x 2.4 in)
131 x 97 x 73 mm
(5.2 x 3.8 x 2.9 in)
|Camera Weight||524 g (18.5 oz)||760 g (26.8 oz)|
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