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Canon 40D vs Olympus E-PM1

The Canon EOS 40D and the Olympus PEN E-PM1 are two digital cameras that were officially introduced, respectively, in August 2007 and June 2011. The 40D is a DSLR, while the E-PM1 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (40D) and a Four Thirds (E-PM1) 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.

Headline Specifications
Canon 40D   Olympus E-PM1
Canon 40D Olympus E-PM1
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Micro Four Thirds lenses
10.1 MP, APS-C Sensor 12.2 MP, Four Thirds Sensor
no Video 1080/60i Video
ISO 100-1600 (100-3200) ISO 100-12800
Optical viewfinder Viewfinder optional
3.0" LCD, 230k dots 3.0" LCD, 460k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
6.5 shutter flaps per second 5.5 shutter flaps per second
Lens stabilization onlyIn-body stabilization
750 shots per battery charge330 shots per battery charge
146 x 108 x 74 mm, 822 g 110 x 64 x 34 mm, 265 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Olympus PEN E-PM1? 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

The side-by-side display below illustrates the physical size and weight of the Canon 40D and the Olympus E-PM1. 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-PM1 can be obtained in six different colors (black, silver, brown, pink, purple, white), while the 40D is only available in black.

Size Canon 40D vs Olympus E-PM1
Compare 40D versus E-PM1 top
Comparison 40D or E-PM1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-PM1 is considerably smaller (55 percent) than the Canon 40D. Moreover, the E-PM1 is substantially lighter (68 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the E-PM1 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 (40D) and the Micro Four Thirds Lens Catalog (E-PM1). Mirrorless cameras, such as the E-PM1, 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 40D gets 750 shots out of its BP-511A battery, while the E-PM1 can take 330 images on a single charge of its BLS-5 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Canon 40D» 5.7 in 4.3 in 2.9 in 29.0 oz 750 n Aug 2007 1,299- i Canon 40D
 
Olympus E-PM1« 4.3 in 2.5 in 1.3 in 9.3 oz 330 n Jun 2011 499- i Olympus E-PM1
 
Canon T3« » 5.1 in 3.9 in 3.1 in 17.5 oz 700 n Feb 2011 449- i Canon T3
 
Canon 60D« » 5.7 in 4.2 in 3.1 in 26.6 oz 1100 Y Aug 2010 1,399- i Canon 60D
 
Canon 50D« » 5.7 in 4.3 in 2.9 in 29.0 oz 800 Y Aug 2008 1,299- i Canon 50D
 
Canon XS« » 5.0 in 3.9 in 2.6 in 17.7 oz 500 n Jun 2008 449- i Canon XS
 
Canon XSi« » 5.1 in 3.9 in 2.4 in 18.5 oz 500 n Jan 2008 799- i Canon XSi
 
Canon 30D« » 5.7 in 4.2 in 2.9 in 27.7 oz 750 n Feb 2006 1,399- i Canon 30D
 
Canon XTi« » 5.0 in 3.3 in 2.6 in 19.6 oz 370 n Aug 2006 799- i Canon XTi
 
Canon 20D« » 5.7 in 4.2 in 2.8 in 27.2 oz 700 n Aug 2004 1,499- i Canon 20D
 
Canon 10D« » 5.9 in 4.2 in 3.0 in 30.0 oz 500 n Feb 2003 1,999- i Canon 10D
 
Nikon D90« » 5.2 in 4.1 in 3.0 in 24.8 oz 850 n Aug 2008 1,299- i Nikon D90
 
Olympus E-PM2« » 4.3 in 2.5 in 1.3 in 9.5 oz 360 n Sep 2012 499- i Olympus E-PM2
 
Olympus E-PL2« » 4.5 in 2.8 in 1.7 in 12.8 oz 280 n Jan 2011 599- i Olympus E-PL2
 
Olympus E-PL3« » 4.3 in 2.5 in 1.5 in 11.0 oz 300 n Jun 2011 599- i Olympus E-PL3
 
Olympus E-PL1« » 4.5 in 2.8 in 1.7 in 11.8 oz 290 n Feb 2010 599- i Olympus E-PL1
 
Panasonic G2« » 4.9 in 3.3 in 2.9 in 15.1 oz 360 n Mar 2010 599- i Panasonic G2
Note: Measurements and pricing do not include easily detachable parts, such as 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 E-PM1 was launched at a markedly lower price (by 62 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.

 

Sensor comparison

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. 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 40D features an APS-C sensor and the Olympus E-PM1 a Four Thirds sensor. The sensor area in the E-PM1 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 40D has a native 3:2 aspect ratio, while the one in the E-PM1 offers a 4:3 aspect.

Canon 40D and Olympus E-PM1 sensor measures

Despite having a smaller sensor, the E-PM1 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 4.29μm versus 5.73μm for the 40D). However, it should be noted that the E-PM1 is much more recent (by 3 years and 10 months) than the 40D, 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-PM1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-PM1 for good quality output (200 dots per inch) amounts to 20.2 x 15.1 inch or 51.2 x 38.4 cm, for very good quality (250 dpi) 16.1 x 12.1 inch or 41 x 30.7 cm, and for excellent quality (300 dpi) 13.4 x 10.1 inch or 34.1 x 25.6 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 Olympus PEN E-PM1 are ISO 100 to ISO 12800 (no boost).

40D versus E-PM1 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 review, the 40D provides substantially higher image quality than the E-PM1, with an overall score that is 12 points higher. This advantage is based on 1.1 bits higher color depth, 1 EV in additional dynamic range, and 0.5 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.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Canon 40D» APS-C 10.1 3888 2592-22.111.370364Canon 40D
 
Olympus E-PM1« Four Thirds 12.2 4032 30241080/60i21.010.349952Olympus E-PM1
 
Canon T3« » APS-C 12.2 4272 2848720/30p21.911.075562Canon T3
 
Canon 60D« » APS-C 17.9 5184 34561080/30p22.211.581366Canon 60D
 
Canon 50D« » APS-C 15.1 4752 3168-21.811.469663Canon 50D
 
Canon XS« » APS-C 10.1 3888 2592-----Canon XS
 
Canon XSi« » APS-C 12.2 4272 2848-21.910.869261Canon XSi
 
Canon 30D« » APS-C 8.2 3504 2336-21.510.873659Canon 30D
 
Canon XTi« » APS-C 10.1 3888 2592-22.111.066462Canon XTi
 
Canon 20D« » APS-C 8.2 3504 2336-21.911.072162Canon 20D
 
Canon 10D« » APS-C 6.3 3072 2048-21.110.957157Canon 10D
 
Nikon D90« » APS-C 12.2 4288 2848720/24p22.712.597773Nikon D90
 
Olympus E-PM2« » Four Thirds 15.9 4608 34561080/30p22.712.293272Olympus E-PM2
 
Olympus E-PL2« » Four Thirds 12.2 4032 3024720/30p21.410.257355Olympus E-PL2
 
Olympus E-PL3« » Four Thirds 12.2 4032 30241080/60i20.910.349952Olympus E-PL3
 
Olympus E-PL1« » Four Thirds 12.2 4032 3024720/30p21.510.148754Olympus E-PL1
 
Panasonic G2« » Four Thirds 12.0 4000 3000720/30p21.210.349353Panasonic G2

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The E-PM1 indeed provides for movie recording, while the 40D does not. The highest resolution format that the E-PM1 can use is 1080/60i.

 

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the 40D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the E-PM1 relies on live view and the rear LCD for framing. That said, the E-PM1 can be equipped with an optional viewfinder – the VF-2. The following table reports on some other key feature differences and similarities of the Canon 40D, the Olympus E-PM1, and comparable cameras.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Canon 40D»optical Y 3.0 230 fixed n 1/8000s 6.5 Y n Canon 40D
 
Olympus E-PM1«- n 3.0 460 fixed n 1/4000s 5.5 n Y Olympus E-PM1
 
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 50D« »optical Y 3.0 920 fixed n 1/8000s 6.3 Y n Canon 50D
 
Canon XS« »optical n 2.5 230 fixed n 1/4000s 3.0 Y n Canon XS
 
Canon XSi« »optical n 3.0 230 fixed n 1/4000s 3.5 Y n Canon XSi
 
Canon 30D« »optical Y 2.5 230 fixed n 1/8000s 5.0 Y n Canon 30D
 
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
 
Canon 10D« »optical Y 1.8 118 fixed n 1/4000s 3.0 Y n Canon 10D
 
Nikon D90« »optical Y 3.0 920 fixed n 1/4000s 4.5 Y n Nikon D90
 
Olympus E-PM2« »- n 3.0 460 fixed Y 1/4000s 8.0 n Y Olympus E-PM2
 
Olympus E-PL2« »- n 3.0 460 fixed n 1/4000s 3.0 Y Y Olympus E-PL2
 
Olympus E-PL3« »- n 3.0 460 tilting n 1/4000s 5.5 n Y Olympus E-PL3
 
Olympus E-PL1« »- n 2.7 230 fixed n 1/2000s 3.0 Y Y Olympus E-PL1
 
Panasonic G2« »1440 n 3.0 460 swivel Y 1/4000s 2.6 Y n Panasonic G2

One difference between the cameras concerns the presence of an on-board flash. The 40D has one, while the E-PM1 does not. While the built-in flash of the 40D is not very powerful, it can at times be useful as a fill-in light.

The 40D writes its imaging data to Compact Flash cards, while the E-PM1 uses SDXC cards.

 

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 40D and Olympus PEN E-PM1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Canon 40D»Y-----2.0---Canon 40D
 
Olympus E-PM1«Ystereomono--mini2.0---Olympus E-PM1
 
Canon T3« »Ystereomono--mini2.0---Canon T3
 
Canon 60D« »YmonomonoY-mini2.0---Canon 60D
 
Canon 50D« »Y----mini2.0---Canon 50D
 
Canon XS« »Y-----2.0---Canon XS
 
Canon XSi« »Y----mini2.0---Canon XSi
 
Canon 30D« »Y-----2.0---Canon 30D
 
Canon XTi« »Y-----2.0---Canon XTi
 
Canon 20D« »Y-----1.1---Canon 20D
 
Canon 10D« »Y-----1.1---Canon 10D
 
Nikon D90« »Ymonomono--mini2.0---Nikon D90
 
Olympus E-PM2« »Ystereomono--mini2.0---Olympus E-PM2
 
Olympus E-PL2« »Ystereo---mini2.0---Olympus E-PL2
 
Olympus E-PL3« »Ystereo---mini2.0---Olympus E-PL3
 
Olympus E-PL1« »Ystereo---mini2.0---Olympus E-PL1
 
Panasonic G2« »Ystereomono--mini2.0---Panasonic G2

Studio photographers will appreciate that the Canon 40D (unlike the E-PM1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 40D and the E-PM1 have been discontinued, but can regularly be found used on eBay. The 40D was replaced by the Canon 50D, while the E-PM1 was followed by the Olympus E-PM2. 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.


Review summary

So how do things add up? Is the Canon 40D better than the Olympus E-PM1 or vice versa? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Canon EOS 40D:

  • Better image quality: Scores substantially higher (12 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (0.5 stops ISO advantage).
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • 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 5.5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Can take more shots (750 versus 330) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • 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).

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Reasons to prefer the Olympus PEN E-PM1:

  • 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.
  • More detailed LCD: Has a higher resolution rear screen (460k vs 230k dots).
  • More compact: Is smaller (110x64mm vs 146x108mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 557g or 68 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 affordable: Was introduced into a lower priced category (62 percent cheaper at launch).
  • More modern: Reflects 3 years and 10 months of technical progress since the 40D launch.

If the count of relative strengths (bullet points above) is taken as a measure, the 40D emerges as the winner of the contest (12 : 9 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.

40D 12:09 E-PM1

How about other alternatives? Do the specifications of the Canon 40D and the Olympus E-PM1 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 40D or the E-PM1. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Canon 40D»+ ++ +4.5/5o4.5/5 Aug 2007 1,299- i Canon 40D
 
Olympus E-PM1«86/10071/1004.5/5-4.5/5 Jun 2011 499- i Olympus E-PM1
 
Canon T3« »80/10069/1004/54/54.5/5 Feb 2011 449- i Canon T3
 
Canon 60D« »+79/1004/55/54.5/5 Aug 2010 1,399- i Canon 60D
 
Canon 50D« »+ ++ +4.5/55/54.5/5 Aug 2008 1,299- i Canon 50D
 
Canon XS« »82/100+ +3.5/54/54.5/5 Jun 2008 449- i Canon XS
 
Canon XSi« »+ ++ +4/55/54.5/5 Jan 2008 799- i Canon XSi
 
Canon 30D« »+ ++ +oo- Feb 2006 1,399- i Canon 30D
 
Canon XTi« »+ ++ +o4.5/54/5 Aug 2006 799- i Canon XTi
 
Canon 20D« »-+ +-o- Aug 2004 1,499- i Canon 20D
 
Canon 10D« »-+ +-o- Feb 2003 1,999- i Canon 10D
 
Nikon D90« »+ ++ +4/55/54.5/5 Aug 2008 1,299- i Nikon D90
 
Olympus E-PM2« »-77/1005/54.5/54.5/5 Sep 2012 499- i Olympus E-PM2
 
Olympus E-PL2« »83/10071/1004.5/54.5/54.5/5 Jan 2011 599- i Olympus E-PL2
 
Olympus E-PL3« »+ +72/1004.5/5-4/5 Jun 2011 599- i Olympus E-PL3
 
Olympus E-PL1« »86/10069/1004/54.5/54.5/5 Feb 2010 599- i Olympus E-PL1
 
Panasonic G2« »-72/1004/54/54.5/5 Mar 2010 599- i Panasonic G2
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. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Canon 40D:
Check Ebay offers
Olympus E-PM1:
Check Ebay offers

Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Canon 40D vs Olympus E-PM1

    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 40D Olympus E-PM1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Micro Four Thirds lenses
    Launch Date August 2007 June 2011
    Launch Price USD 1299 USD 499
    Sensor Specs Canon 40D Olympus E-PM1
    Sensor Technology CMOS CMOS
    Sensor Format APS-C Sensor Four Thirds Sensor
    Sensor Size 22.3 x 14.9 mm 17.3 x 13.0 mm
    Sensor Area 332.27 mm2 224.9 mm2
    Sensor Diagonal 26.8 mm 21.6 mm
    Crop Factor 1.6x 2.0x
    Sensor Resolution 10.1 Megapixels 12.2 Megapixels
    Image Resolution 3888 x 2592 pixels 4032 x 3024 pixels
    Pixel Pitch 5.73 μm 4.29 μm
    Pixel Density 3.03 MP/cm2 5.42 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 100-1600 ISO 100-12800 ISO
    ISO Boost 100-3200 ISO no Enhancement
    Image Processor DIGIC 3 TruePic VI
    DXO Sensor Quality (score) 64 52
    DXO Color Depth (bits) 22.1 21.0
    DXO Dynamic Range (EV) 11.3 10.3
    DXO Low Light (ISO) 703 499
    Screen Specs Canon 40D Olympus E-PM1
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.59x
    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 460k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Canon 40D Olympus E-PM1
    Autofocus System Phase-detect AF Contrast-detect AF
    Continuous Shooting 6.5 shutter flaps/s 5.5 shutter flaps/s
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash Build-in Flash no On-Board Flash
    Storage Medium CF cards SDXC cards
    Second Storage Option Single card slot Single card slot
    Connectivity Specs Canon 40D Olympus E-PM1
    External Flash Hotshoe Hotshoe
    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 Olympus E-PM1
    Battery Type BP-511A BLS-5
    Battery Life (CIPA)750 shots per charge330 shots per charge
    Body Dimensions 146 x 108 x 74 mm
    (5.7 x 4.3 x 2.9 in)
    110 x 64 x 34 mm
    (4.3 x 2.5 x 1.3 in)
    Camera Weight 822 g (29.0 oz) 265 g (9.3 oz)

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