Canon XTi vs Olympus E-P3
The Canon EOS Rebel XTi (called Canon 400D in some regions) and the Olympus PEN E-P3 are two digital cameras that were revealed to the public, respectively, in August 2006 and June 2011. The XTi is a DSLR, while the E-P3 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (XTi) and a Four Thirds (E-P3) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Olympus provides 12.2 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 XTi and the Olympus PEN E-P3? 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 XTi and the Olympus E-P3. The two cameras are presented according to their relative size. 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.
The E-P3 can be obtained in three different colors (black, silver, white), while the XTi is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-P3 is notably smaller (21 percent) than the Canon XTi. Moreover, the E-P3 is markedly lighter (34 percent) than the XTi. In this context, it is worth noting that neither the XTi nor the E-P3 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (XTi) and the Micro Four Thirds Lens Catalog (E-P3). Mirrorless cameras, such as the E-P3, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Canon XTi||127 mm||84 mm||65 mm||556 g||370||n||Aug 2006||799|
|2.||Olympus E-P3||122 mm||69 mm||34 mm||369 g||330||n||Jun 2011||799|
|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 XSi||129 mm||98 mm||62 mm||524 g||500||n||Jan 2008||799|
|10.||Canon 40D||146 mm||108 mm||74 mm||822 g||750||n||Aug 2007||1,299|
|11.||Canon XT||127 mm||94 mm||64 mm||540 g||400||n||Feb 2005||899|
|12.||Canon Rebel||142 mm||99 mm||72 mm||649 g||400||n||Aug 2003||899|
|13.||Olympus E-PL2||114 mm||72 mm||42 mm||362 g||280||n||Jan 2011||599|
|14.||Olympus E-PL3||110 mm||64 mm||37 mm||313 g||300||n||Jun 2011||599|
|15.||Olympus E-PL1||115 mm||72 mm||42 mm||334 g||290||n||Feb 2010||599|
|16.||Olympus E-P1||121 mm||70 mm||36 mm||355 g||300||n||Jun 2009||799|
|17.||Olympus E-P2||121 mm||70 mm||36 mm||355 g||300||n||Nov 2009||799|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. 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 two cameras under review were launched at the same price and fall into the same 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon XTi features an APS-C sensor and the Olympus E-P3 a Four Thirds sensor. The sensor area in the E-P3 is 32 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.0. The sensor in the XTi has a native 3:2 aspect ratio, while the one in the E-P3 offers a 4:3 aspect.
Despite having a smaller sensor, the E-P3 offers a higher resolution of 12.2 megapixels, compared with 10.1 MP of the XTi. 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 4.29μm versus 5.71μm for the XTi). However, it should be noted that the E-P3 is much more recent (by 4 years and 10 months) than the XTi, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
The resolution advantage of the Olympus E-P3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-P3 for good quality output (200 dots per inch) amounts to 20.2 x 15.1 inches or 51.2 x 38.4 cm, for very good quality (250 dpi) 16.1 x 12.1 inches or 41 x 30.7 cm, and for excellent quality (300 dpi) 13.4 x 10.1 inches or 34.1 x 25.6 cm. The corresponding values for the Canon XTi 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 Rebel XTi has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Olympus PEN E-P3 are ISO 200 to ISO 12800 (no boost).
For many cameras, data on sensor performance has been reported by DXO Mark. 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"). Of the two cameras under review, the XTi provides substantially higher image quality than the E-P3, with an overall score that is 11 points higher. This advantage is based on 1.3 bits higher color depth, 0.9 EV in additional dynamic range, and 0.3 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.
|2.||Olympus E-P3||Four Thirds||12.2||4032||3024||1080/60i||20.8||10.1||536||51|
|13.||Olympus E-PL2||Four Thirds||12.2||4032||3024||720/30p||21.4||10.2||573||55|
|14.||Olympus E-PL3||Four Thirds||12.2||4032||3024||1080/60i||20.9||10.3||499||52|
|15.||Olympus E-PL1||Four Thirds||12.2||4032||3024||720/30p||21.5||10.1||487||54|
|16.||Olympus E-P1||Four Thirds||12.2||4032||3024||720/30p||21.4||10.4||536||55|
|17.||Olympus E-P2||Four Thirds||12.2||4032||3024||720/30p||21.5||10.4||505||56|
Many modern cameras are not only capable of taking still images, but can also record movies. The E-P3 indeed provides for movie recording, while the XTi does not. The highest resolution format that the E-P3 can use is 1080/60i.
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the XTi has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the E-P3 relies on live view and the rear LCD for framing. That said, the E-P3 can be equipped with an optional viewfinder – the VF-3. The following table reports on some other key feature differences and similarities of the Canon XTi, the Olympus E-P3, and comparable cameras.
|1.||Canon XTi||optical||n||2.5 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|2.||Olympus E-P3||optional||n||3.0 / 614||fixed||Y||1/4000s||3.0/s||Y||Y|
|3.||Canon T6i||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|4.||Canon T6s||optical||Y||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|5.||Canon T4i||optical||n||3.0 / 1040||swivel||Y||1/4000s||5.0/s||Y||n|
|6.||Canon T3||optical||n||2.7 / 230||fixed||n||1/4000s||3.0/s||Y||n|
|7.||Canon T2i||optical||n||3.0 / 1040||fixed||n||1/4000s||3.7/s||Y||n|
|8.||Canon T1i||optical||n||3.0 / 920||fixed||n||1/4000s||3.4/s||Y||n|
|9.||Canon XSi||optical||n||3.0 / 230||fixed||n||1/4000s||3.5/s||Y||n|
|10.||Canon 40D||optical||Y||3.0 / 230||fixed||n||1/8000s||6.5/s||Y||n|
|11.||Canon XT||optical||n||1.8 / 115||fixed||n||1/4000s||3.0/s||Y||n|
|12.||Canon Rebel||optical||n||1.8 / 118||fixed||n||1/4000s||2.5/s||Y||n|
|13.||Olympus E-PL2||optional||n||3.0 / 460||fixed||n||1/4000s||3.0/s||Y||Y|
|14.||Olympus E-PL3||optional||n||3.0 / 460||tilting||n||1/4000s||5.5/s||n||Y|
|15.||Olympus E-PL1||optional||n||2.7 / 230||fixed||n||1/2000s||3.0/s||Y||Y|
|16.||Olympus E-P1||none||n||3.0 / 230||fixed||n||1/4000s||3.0/s||n||Y|
|17.||Olympus E-P2||optional||n||3.0 / 230||fixed||n||1/4000s||3.0/s||n||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-P3 has a touchscreen, while the XTi has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The XTi writes its imaging data to Compact Flash cards, while the E-P3 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 XTi and Olympus PEN E-P3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon XTi||Y||- / -||-||-||-||2.0||-||-||-|
|2.||Olympus E-P3||Y||stereo / -||-||-||mini||2.0||-||-||-|
|3.||Canon T6i||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|4.||Canon T6s||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|5.||Canon T4i||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|6.||Canon T3||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|7.||Canon T2i||Y||stereo / -||Y||-||mini||2.0||-||-||-|
|8.||Canon T1i||Y||mono / mono||-||-||mini||2.0||-||-||-|
|9.||Canon XSi||Y||- / -||-||-||mini||2.0||-||-||-|
|10.||Canon 40D||Y||- / -||-||-||-||2.0||-||-||-|
|11.||Canon XT||Y||- / -||-||-||-||2.0||-||-||-|
|12.||Canon Rebel||Y||- / -||-||-||-||1.1||-||-||-|
|13.||Olympus E-PL2||Y||stereo / -||-||-||mini||2.0||-||-||-|
|14.||Olympus E-PL3||Y||stereo / -||-||-||mini||2.0||-||-||-|
|15.||Olympus E-PL1||Y||stereo / -||-||-||mini||2.0||-||-||-|
|16.||Olympus E-P1||Y||stereo / -||-||-||mini||2.0||-||-||-|
|17.||Olympus E-P2||Y||stereo / -||-||-||mini||2.0||-||-||-|
Both the XTi and the E-P3 have been discontinued, but can regularly be found used on eBay. The XTi was replaced by the Canon Xsi, while the E-P3 was followed by the Olympus E-P5. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Olympus websites.
So what is the bottom line? Is there a clear favorite between the Canon XTi and the Olympus E-P3? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Canon EOS Rebel XTi:
- Better image quality: Scores substantially higher (11 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.3 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (0.9 EV of extra DR).
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Longer lasting: Can take more shots (370 versus 330) on a single battery charge.
- More heavily discounted: Has been available for much longer (launched in August 2006).
Reasons to prefer the Olympus PEN E-P3:
- More detail: Has more megapixels (12.2 vs 10.1MP), which boosts linear resolution by 8%.
- Broader imaging potential: Can capture not only stills but also 1080/60i 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 (614k vs 230k dots).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More compact: Is smaller (122x69mm vs 127x84mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 187g or 34 percent) and is thus easier to take along.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- More modern: Reflects 4 years and 10 months of technical progress since the XTi launch.
If the number of relative strengths (bullet points above) is taken as a guide, the E-P3 is the clear winner of the contest (10 : 6 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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 XTi and the Olympus E-P3 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the XTi or the E-P3. 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 following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], 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 XTi||..||+ +||..||+ +||o||4/5||Aug 2006||799|
|2.||Olympus E-P3||..||83/100||..||74/100||4.5/5||4.5/5||Jun 2011||799|
|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 XSi||..||+ +||..||+ +||4/5||4.5/5||Jan 2008||799|
|10.||Canon 40D||..||+ +||..||+ +||4.5/5||4.5/5||Aug 2007||1,299|
|11.||Canon XT||..||80/100||..||+ +||o||..||Feb 2005||899|
|12.||Canon Rebel||..||..||..||+ +||..||..||Aug 2003||899|
|13.||Olympus E-PL2||3/5||83/100||..||71/100||4.5/5||4.5/5||Jan 2011||599|
|14.||Olympus E-PL3||3/5||+ +||..||72/100||4.5/5||4/5||Jun 2011||599|
|15.||Olympus E-PL1||..||86/100||..||69/100||4/5||4.5/5||Feb 2010||599|
|16.||Olympus E-P1||..||+||..||66/100||4/5||4.5/5||Jun 2009||799|
|17.||Olympus E-P2||3/5||+||..||69/100||4/5||4.5/5||Nov 2009||799|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 1Ds vs Canon XTi
- Canon 2000D vs Olympus E-P3
- Canon M50 Mark II vs Canon XTi
- Canon T5i vs Canon XTi
- Canon XTi vs Olympus E-M1
- Canon XTi vs Olympus E-M10 III
- Canon XTi vs Panasonic L1
- Nikon D70s vs Olympus E-P3
- Olympus E-P3 vs Panasonic LX100 II
- Olympus E-P3 vs Ricoh GR III
- Olympus E-P3 vs Sony HX95
- Olympus E-P3 vs Sony NEX-5T
Specifications: Canon XTi vs Olympus E-P3
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 XTi||Olympus E-P3|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Canon EF mount lenses||Micro Four Thirds lenses|
|Launch Date||August 2006||June 2011|
|Launch Price||USD 799||USD 799|
|Sensor Specs||Canon XTi||Olympus E-P3|
|Sensor Format||APS-C Sensor||Four Thirds Sensor|
|Sensor Size||22.2 x 14.8 mm||17.3 x 13.0 mm|
|Sensor Area||328.56 mm2||224.9 mm2|
|Sensor Diagonal||26.7 mm||21.6 mm|
|Sensor Resolution||10.1 Megapixels||12.2 Megapixels|
|Image Resolution||3888 x 2592 pixels||4032 x 3024 pixels|
|Pixel Pitch||5.71 μm||4.29 μm|
|Pixel Density||3.07 MP/cm2||5.42 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/60i Video|
|ISO Setting||100 - 1,600 ISO||200 - 12,800 ISO|
|Image Processor||DIGIC II||TruePic VI|
|DXO Sensor Quality (score)||62||51|
|DXO Color Depth (bits)||22.1||20.8|
|DXO Dynamic Range (EV)||11.0||10.1|
|DXO Low Light (ISO)||664||536|
|Screen Specs||Canon XTi||Olympus E-P3|
|Viewfinder Type||Optical viewfinder||Viewfinder optional|
|Viewfinder Field of View||95%|
|LCD Framing||Live View|
|Rear LCD Size||2.5inch||3.0inch|
|LCD Resolution||230k dots||614k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Canon XTi||Olympus E-P3|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Continuous Shooting||3 shutter flaps/s||3 shutter flaps/s|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|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 XTi||Olympus E-P3|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Canon XTi||Olympus E-P3|
|Battery Life (CIPA)||370 shots per charge||330 shots per charge|
127 x 84 x 65 mm
(5.0 x 3.3 x 2.6 in)
122 x 69 x 34 mm
(4.8 x 2.7 x 1.3 in)
|Camera Weight||556 g (19.6 oz)||369 g (13.0 oz)|
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