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Canon XTi vs Olympus E-M1

The Canon EOS Rebel XTi (called Canon 400D in some regions) and the Olympus OM-D E-M1 are two digital cameras that were officially introduced, respectively, in August 2006 and September 2013. The XTi is a DSLR, while the E-M1 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (XTi) and a Four Thirds (E-M1) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Olympus provides 15.9 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon XTi
versus
Olympus E-M1
Canon XTi   Olympus E-M1
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Micro Four Thirds lenses
10.1 MP – APS-C sensor 15.9 MP – Four Thirds sensor
no Video 1080/30p Video
ISO 100-1,600 ISO 200-25,600
Optical viewfinder Electronic viewfinder (2360k dots)
2.5" LCD – 230k dots 3.0" LCD – 1037k dots
Fixed screen (not touch-sensitive) Tilting touchscreen
3 shutter flaps per second 10 shutter flaps per second
Lens stabilization onlyIn-body stabilization
not weather sealedWeathersealed body
370 shots per battery charge350 shots per battery charge
127 x 84 x 65 mm, 556 g 130 x 94 x 63 mm, 497 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS Rebel XTi and the Olympus OM-D E-M1? 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.

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Body comparison

The side-by-side display below illustrates the physical size and weight of the Canon XTi and the Olympus E-M1. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

The E-M1 can be obtained in two different colors (black, silver), while the XTi is only available in black.

Size Canon XTi vs Olympus E-M1
Compare XTi versus E-M1 top
Comparison XTi or E-M1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-M1 is notably larger (15 percent) than the Canon XTi. However, the E-M1 is markedly lighter (11 percent) than the XTi. It is noteworthy in this context that the E-M1 is splash and dust-proof, while the XTi 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. 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-M1). Mirrorless cameras, such as the E-M1, 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.

Concerning battery life, the XTi gets 370 shots out of its Canon NB-2LH battery, while the E-M1 can take 350 images on a single charge of its Olympus BLN-1 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon XTi 127 mm 84 mm 65 mm 556 g 370 n Aug 2006 799ebay.com
2.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
3.
 
Canon T6i 132 mm 101 mm 78 mm 555 g 440 n Feb 2015 749ebay.com
4.
 
Canon T4i 133 mm 100 mm 79 mm 575 g 440 n Jun 2012 849ebay.com
5.
 
Canon T3 130 mm 100 mm 78 mm 495 g 700 n Feb 2011 449ebay.com
6.
 
Canon T2i 129 mm 98 mm 62 mm 530 g 440 n Feb 2010 699ebay.com
7.
 
Canon T1i 129 mm 98 mm 62 mm 520 g 400 n Mar 2009 799ebay.com
8.
 
Canon XS 126 mm 98 mm 65 mm 502 g 500 n Jun 2008 449ebay.com
9.
 
Canon XSi 129 mm 98 mm 62 mm 524 g 500 n Jan 2008 799ebay.com
10.
 
Canon 40D 146 mm 108 mm 74 mm 822 g 750 n Aug 2007 1,299ebay.com
11.
 
Canon XT 127 mm 94 mm 64 mm 540 g 400 n Feb 2005 899ebay.com
12.
 
Canon Rebel 142 mm 99 mm 72 mm 649 g 400 n Aug 2003 899ebay.com
13.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999ebay.com
14.
 
Olympus E-M5 II 124 mm 85 mm 45 mm 469 g 310 Y Feb 2015 1,099ebay.com
15.
 
Olympus E-P5 122 mm 69 mm 37 mm 420 g 330 n May 2013 999ebay.com
16.
 
Olympus E-M5 122 mm 89 mm 43 mm 425 g 360 Y Feb 2012 1,299ebay.com
17.
 
Panasonic GH4 133 mm 93 mm 84 mm 560 g 500 Y Feb 2014 1,499ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The XTi was launched at a markedly lower price (by 43 percent) than the E-M1, 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.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon XTi features an APS-C sensor and the Olympus E-M1 a Four Thirds sensor. The sensor area in the E-M1 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-M1 offers a 4:3 aspect.

Canon XTi and Olympus E-M1 sensor measures

Despite having a smaller sensor, the E-M1 offers a higher resolution of 15.9 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 3.76μm versus 5.71μm for the XTi). However, it should be noted that the E-M1 is much more recent (by 7 years) than the XTi, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the E-M1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Olympus E-M1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M1 for good quality output (200 dots per inch) amounts to 23 x 17.3 inches or 58.5 x 43.9 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.8 x 35.1 cm, and for excellent quality (300 dpi) 15.4 x 11.5 inches or 39 x 29.3 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 E-M1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Canon EOS Rebel XTi has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Olympus OM-D E-M1 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

XTi versus E-M1 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 consideration, the E-M1 offers substantially better image quality than the XTi (overall score 11 points higher). The advantage is based on 0.9 bits higher color depth, 1.7 EV in additional dynamic range, and 0.2 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Canon XTi APS-C 10.1 3888 2592none22.111.066462
2.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
3.
 
Canon T6i APS-C 24.0 6000 40001080/30p22.712.091971
4.
 
Canon T4i APS-C 17.9 5184 34561080/30p21.711.272262
5.
 
Canon T3 APS-C 12.2 4272 2848720/30p21.911.075562
6.
 
Canon T2i APS-C 17.9 5184 34561080/30p22.111.578466
7.
 
Canon T1i APS-C 15.1 4752 31681080/20p21.711.566363
8.
 
Canon XS APS-C 10.1 3888 2592none22.010.971962
9.
 
Canon XSi APS-C 12.2 4272 2848none21.910.869261
10.
 
Canon 40D APS-C 10.1 3888 2592none22.111.370364
11.
 
Canon XT APS-C 8.0 3456 2304none21.810.863760
12.
 
Canon Rebel APS-C 6.3 3072 2048none21.010.854455
13.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
14.
 
Olympus E-M5 II Four Thirds 15.9 4608 34561080/60p23.012.584273
15.
 
Olympus E-P5 Four Thirds 15.9 4608 34561080/30p22.812.489572
16.
 
Olympus E-M5 Four Thirds 15.9 4608 34561080/60i22.812.382671
17.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
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Many modern cameras are not only capable of taking still images, but can also record movies. The E-M1 indeed provides for movie recording, while the XTi does not. The highest resolution format that the E-M1 can use is 1080/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the E-M1 has an electronic viewfinder (2360k dots), while the XTi has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the E-M1 offers a wider field of view (100%) than the one in the XTi (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the E-M1 has a higher magnification (0.74x vs 0.49x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Canon XTi and Olympus E-M1 along with similar information for a selection of comparators.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Canon XTioptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
2.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
3.
 
Canon T6ioptical n3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
4.
 
Canon T4ioptical n3.0 / 1040 swivel Y 1/4000s 5.0/s Y n
5.
 
Canon T3optical n2.7 / 230 fixed n 1/4000s 3.0/s Y n
6.
 
Canon T2ioptical n3.0 / 1040 fixed n 1/4000s 3.7/s Y n
7.
 
Canon T1ioptical n3.0 / 920 fixed n 1/4000s 3.4/s Y n
8.
 
Canon XSoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
9.
 
Canon XSioptical n3.0 / 230 fixed n 1/4000s 3.5/s Y n
10.
 
Canon 40Doptical Y3.0 / 230 fixed n 1/8000s 6.5/s Y n
11.
 
Canon XToptical n1.8 / 115 fixed n 1/4000s 3.0/s Y n
12.
 
Canon Rebeloptical n1.8 / 118 fixed n 1/4000s 2.5/s Y n
13.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
14.
 
Olympus E-M5 II2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
15.
 
Olympus E-P5optional n3.0 / 1037 tilting Y 1/8000s 9.0/s Y Y
16.
 
Olympus E-M51440 n3.0 / 610 tilting Y 1/4000s 9.0/s n Y
17.
 
Panasonic GH42359 n3.0 / 1036 swivel Y 1/8000s 12.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The XTi has one, while the E-M1 does not. While the built-in flash of the XTi is not very powerful, it can at times be useful as a fill-in light.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the E-M1 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Olympus E-M1 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 XTi writes its imaging data to Compact Flash cards, while the E-M1 uses SDXC cards.

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Connectivity comparison

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 OM-D E-M1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon XTiY- / ----2.0---
2.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
3.
 
Canon T6iYstereo / monoY-mini2.0YY-
4.
 
Canon T4iYstereo / monoY-mini2.0---
5.
 
Canon T3Ystereo / mono--mini2.0---
6.
 
Canon T2iYstereo / -Y-mini2.0---
7.
 
Canon T1iYmono / mono--mini2.0---
8.
 
Canon XSY- / ----2.0---
9.
 
Canon XSiY- / ---mini2.0---
10.
 
Canon 40DY- / ----2.0---
11.
 
Canon XTY- / ----2.0---
12.
 
Canon RebelY- / ----1.1---
13.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
14.
 
Olympus E-M5 IIYstereo / monoY-micro2.0Y--
15.
 
Olympus E-P5Ystereo / mono--micro2.0Y--
16.
 
Olympus E-M5Ystereo / mono--mini2.0---
17.
 
Panasonic GH4Ystereo / monoYYmicro2.0YY-
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It is notable that the E-M1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the XTi does not provide wifi capability.

Studio photographers will appreciate that the Olympus E-M1 (unlike the XTi) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the XTi and the E-M1 have been discontinued, but can regularly be found used on ebay. The XTi was replaced by the Canon Xsi, while the E-M1 was followed by the Olympus E-M1 II. Further information on the features and operation of the XTi and E-M1 can be found, respectively, in the Canon XTi Manual (free pdf) or the online Olympus E-M1 Manual.

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Review summary

So what conclusions can be drawn? Is there a clear favorite between the Canon XTi and the Olympus E-M1? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the Canon EOS Rebel XTi:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • More compact: Is smaller (127x84mm vs 130x94mm) and thus needs less room in the bag.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (43 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in August 2006).

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Arguments in favor of the Olympus OM-D E-M1:

  • More detail: Has more megapixels (15.9 vs 10.1MP), which boosts linear resolution by 23%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (11 points) in the DXO overall evaluation.
  • More dynamic range: Captures a broader range of light and dark details (1.7 EV of extra DR).
  • Broader imaging potential: Can capture not only stills but also 1080/30p video.
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • 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 (0.74x vs 0.49x).
  • 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 (1037k vs 230k dots).
  • More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (10 vs 3 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Less heavy: Has a lower weight (by 59g or 11 percent) and is thus easier to take along.
  • 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.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More modern: Reflects 7 years of technical progress since the XTi launch.

If the number of relative strengths (bullet points above) is taken as a guide, the E-M1 is the clear winner of the contest (24 : 6 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.

XTi 06:24 E-M1

How about other alternatives? Do the specifications of the Canon XTi and the Olympus E-M1 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 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 XTi or the E-M1. 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

This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon XTi..+ +..+ +o4/5 Aug 2006 799ebay.com
2.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
3.
 
Canon T6i5/5....75/1004.5/54.5/5 Feb 2015 749ebay.com
4.
 
Canon T4i4/5+ +..77/1004.5/54.5/5 Jun 2012 849ebay.com
5.
 
Canon T3..80/100..69/1004/54.5/5 Feb 2011 449ebay.com
6.
 
Canon T2i..+ +..77/1004/54.5/5 Feb 2010 699ebay.com
7.
 
Canon T1i..+ +..74/1004.5/54.5/5 Mar 2009 799ebay.com
8.
 
Canon XS..82/100..+ +3.5/54.5/5 Jun 2008 449ebay.com
9.
 
Canon XSi..+ +..+ +4/54.5/5 Jan 2008 799ebay.com
10.
 
Canon 40D..+ +..+ +4.5/54.5/5 Aug 2007 1,299ebay.com
11.
 
Canon XT..80/100..+ +o.. Feb 2005 899ebay.com
12.
 
Canon Rebel......+ +.... Aug 2003 899ebay.com
13.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 1,999ebay.com
14.
 
Olympus E-M5 II5/5+ +4.5/581/1005/55/5 Feb 2015 1,099ebay.com
15.
 
Olympus E-P55/5+ +..78/1004.5/55/5 May 2013 999ebay.com
16.
 
Olympus E-M54/5+ +..80/1004.5/55/5 Feb 2012 1,299ebay.com
17.
 
Panasonic GH45/5+ +..85/1005/55/5 Feb 2014 1,499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted 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 rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

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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 your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Canon XTi vs Olympus E-M1

    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 Specifications
    Camera Model Canon XTi Olympus E-M1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Micro Four Thirds lenses
    Launch Date August 2006 September 2013
    Launch Price USD 799 USD 1,399
    Sensor Specs Canon XTi Olympus E-M1
    Sensor Technology CMOS CMOS
    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
    Crop Factor 1.6x 2.0x
    Sensor Resolution 10.1 Megapixels 15.9 Megapixels
    Image Resolution 3888 x 2592 pixels 4608 x 3456 pixels
    Pixel Pitch 5.71 μm 3.76 μm
    Pixel Density 3.07 MP/cm2 7.08 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video 1080/30p Video
    ISO Setting 100 - 1,600 ISO 200 - 25,600 ISO
    ISO Boost no Enhancement 100 - 25,600 ISO
    Image Processor DIGIC II TruePIC VII
    DXO Sensor Quality (score) 62 73
    DXO Color Depth (bits) 22.1 23.0
    DXO Dynamic Range (EV) 11.0 12.7
    DXO Low Light (ISO) 664 757
    Screen Specs Canon XTi Olympus E-M1
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.49x 0.74x
    Viewfinder Resolution 2360k dots
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 1037k dots
    LCD Attachment Fixed screen Tilting screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon XTi Olympus E-M1
    Focus System Phase-detect AF On-Sensor Phase-detect
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/8000s
    Continuous Shooting 3 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy50 000 actuations150 000 actuations
    Electronic Shutterno E-ShutterYES
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    Connectivity Specs Canon XTi Olympus E-M1
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Microphone Port no MIC socket External MIC port
    Wifi Support no Wifi Wifi built-in
    Body Specs Canon XTi Olympus E-M1
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Canon NB-2LH Olympus BLN-1
    Battery Life (CIPA)370 shots per charge350 shots per charge
    Body Dimensions 127 x 84 x 65 mm
    (5.0 x 3.3 x 2.6 in)
    130 x 94 x 63 mm
    (5.1 x 3.7 x 2.5 in)
    Camera Weight 556 g (19.6 oz) 497 g (17.5 oz)
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