Canon 40D vs Olympus E-M10 IV
The Canon EOS 40D and the Olympus OM-D E-M10 Mark IV are two digital cameras that were announced, respectively, in August 2007 and August 2020. The 40D is a DSLR, while the E-M10 IV is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (40D) and a Four Thirds (E-M10 IV) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Olympus provides 20.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check 40D offers at
ebay.com

Check E-M10 IV price at
amazon.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Olympus OM-D E-M10 Mark IV? 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 physical size and weight of the Canon 40D and the Olympus E-M10 IV are illustrated in the side-by-side display below. 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 size dimensions are rounded to the nearest millimeter.
The E-M10 IV can be obtained in two different colors (black, silver), while the 40D 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-M10 IV is considerably smaller (35 percent) than the Canon 40D. Moreover, the E-M10 IV is substantially lighter (53 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the E-M10 IV 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-M10 IV). Mirrorless cameras, such as the E-M10 IV, 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 Canon BP-511A battery, while the E-M10 IV can take 360 images on a single charge of its Olympus BLS-50 power pack. The power pack in the E-M10 IV can be charged via the USB port, which can be very convenient when travelling.
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, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | 146 mm | 108 mm | 74 mm | 822 g | 750 | n | Aug 2007 | US$ 1 299 | ebay.com | |
| 2. | Olympus E-M10 IV | 122 mm | 84 mm | 49 mm | 383 g | 360 | n | Aug 2020 | US$ 699 | amazon.com | |
| 3. | Canon 20D | 144 mm | 106 mm | 72 mm | 770 g | 700 | n | Aug 2004 | US$ 1 499 | ebay.com | |
| 4. | Canon 30D | 144 mm | 106 mm | 74 mm | 785 g | 750 | n | Feb 2006 | US$ 1 399 | ebay.com | |
| 5. | Canon 50D | 146 mm | 108 mm | 74 mm | 822 g | 800 | Y | Aug 2008 | US$ 1 299 | ebay.com | |
| 6. | Canon 60D | 145 mm | 106 mm | 79 mm | 755 g | 1100 | Y | Aug 2010 | US$ 1 399 | ebay.com | |
| 7. | Canon 70D | 139 mm | 104 mm | 79 mm | 755 g | 920 | Y | Jul 2013 | US$ 1 199 | ebay.com | |
| 8. | Canon 400D | 127 mm | 84 mm | 65 mm | 556 g | 370 | n | Aug 2006 | US$ 799 | ebay.com | |
| 9. | Canon 450D | 129 mm | 98 mm | 62 mm | 524 g | 500 | n | Jan 2008 | US$ 799 | ebay.com | |
| 10. | Canon 1000D | 126 mm | 98 mm | 65 mm | 502 g | 500 | n | Jun 2008 | US$ 449 | ebay.com | |
| 11. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | US$ 1 299 | ebay.com | |
| 12. | Olympus E-30 | 142 mm | 108 mm | 75 mm | 701 g | 750 | n | Nov 2008 | US$ 1 299 | ebay.com | |
| 13. | Olympus E-M10 | 119 mm | 82 mm | 46 mm | 396 g | 320 | n | Jan 2014 | US$ 699 | ebay.com | |
| 14. | Olympus E-M10 II | 120 mm | 83 mm | 47 mm | 390 g | 320 | n | Aug 2015 | US$ 649 | ebay.com | |
| 15. | Olympus E-M10 III | 122 mm | 84 mm | 50 mm | 410 g | 330 | n | Aug 2017 | US$ 649 | ebay.com | |
| 16. | Olympus E-P7 | 118 mm | 69 mm | 38 mm | 337 g | 360 | n | Jun 2021 | US$ 799 | amazon.com | |
| 17. | Olympus E-PL10 | 117 mm | 68 mm | 39 mm | 380 g | 350 | n | Oct 2019 | US$ 599 | ebay.com | |
| Note: 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 E-M10 IV was launched at a markedly lower price (by 46 percent) than the 40D, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Canon 40D features an APS-C sensor and the Olympus E-M10 IV a Four Thirds sensor. The sensor area in the E-M10 IV 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-M10 IV offers a 4:3 aspect.

Despite having a smaller sensor, the E-M10 IV offers a higher resolution of 20.2 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 3.34μm versus 5.73μm for the 40D). However, it should be noted that the E-M10 IV is much more recent (by 12 years and 11 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. Coming back to sensor resolution, it should be mentioned that the E-M10 IV has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Olympus E-M10 IV implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M10 IV for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inches or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inches or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inches or 43.9 x 32.9 cm. The corresponding values for the Canon 40D 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 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 OM-D E-M10 Mark IV 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.

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. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.3 | 703 | 64 | |
| 2. | Olympus E-M10 IV | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.2 | 1402 | 76 | |
| 3. | Canon 20D | APS-C | 8.2 | 3504 | 2336 | none | 21.9 | 11.0 | 721 | 62 | |
| 4. | Canon 30D | APS-C | 8.2 | 3504 | 2336 | none | 21.5 | 10.8 | 736 | 59 | |
| 5. | Canon 50D | APS-C | 15.1 | 4752 | 3168 | none | 21.8 | 11.4 | 696 | 63 | |
| 6. | Canon 60D | APS-C | 17.9 | 5184 | 3456 | 1080/30p | 22.2 | 11.5 | 813 | 66 | |
| 7. | Canon 70D | APS-C | 20.0 | 5472 | 3648 | 1080/30p | 22.5 | 11.6 | 926 | 68 | |
| 8. | Canon 400D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.0 | 664 | 62 | |
| 9. | Canon 450D | APS-C | 12.2 | 4272 | 2848 | none | 21.9 | 10.8 | 692 | 61 | |
| 10. | Canon 1000D | APS-C | 10.1 | 3888 | 2592 | none | 22.0 | 10.9 | 719 | 62 | |
| 11. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
| 12. | Olympus E-30 | Four Thirds | 12.2 | 4032 | 3024 | none | 21.3 | 10.4 | 530 | 55 | |
| 13. | Olympus E-M10 | Four Thirds | 15.9 | 4608 | 3456 | 1080/30p | 22.8 | 12.3 | 884 | 72 | |
| 14. | Olympus E-M10 II | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 23.1 | 12.5 | 842 | 73 | |
| 15. | Olympus E-M10 III | Four Thirds | 15.9 | 4608 | 3456 | 4K/30p | 23.1 | 12.8 | 1120 | 74 | |
| 16. | Olympus E-P7 | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.4 | 13.3 | 1494 | 77 | |
| 17. | Olympus E-PL10 | Four Thirds | 15.9 | 4608 | 3456 | 4K/30p | 23.3 | 13.1 | 1324 | 76 | |
| Note: DXO values in italics represent estimates based on sensor size and age. | |||||||||||
Many modern cameras cannot only take still pictures, but also record videos. The E-M10 IV indeed provides for movie recording, while the 40D does not. The highest resolution format that the E-M10 IV can use is 4K/30p.
Feature comparison
Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-M10 IV has an electronic viewfinder (2360k dots), while the 40D 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-M10 IV offers a wider field of view (100%) than the one in the 40D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the E-M10 IV has a higher magnification (0.62x vs 0.59x), 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 40D and Olympus E-M10 IV along with similar information for a selection of comparators.

| 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 40D | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 6.5/s | Y | n | |
| 2. | Olympus E-M10 IV | 2360 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 15.0/s | Y | Y | |
| 3. | Canon 20D | optical | Y | 1.8 / 118 | fixed | n | 1/8000s | 5.0/s | Y | n | |
| 4. | Canon 30D | optical | Y | 2.5 / 230 | fixed | n | 1/8000s | 5.0/s | Y | n | |
| 5. | Canon 50D | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 6.3/s | Y | n | |
| 6. | Canon 60D | optical | Y | 3.0 / 1040 | swivel | n | 1/8000s | 5.3/s | Y | n | |
| 7. | Canon 70D | optical | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 7.0/s | Y | n | |
| 8. | Canon 400D | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 9. | Canon 450D | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.5/s | Y | n | |
| 10. | Canon 1000D | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 11. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
| 12. | Olympus E-30 | optical | Y | 2.7 / 230 | swivel | n | 1/8000s | 5.0/s | Y | Y | |
| 13. | Olympus E-M10 | 1440 | n | 3.0 / 1037 | tilting | Y | 1/4000s | 8.0/s | Y | Y | |
| 14. | Olympus E-M10 II | 2360 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.0/s | Y | Y | |
| 15. | Olympus E-M10 III | 2360 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.6/s | Y | Y | |
| 16. | Olympus E-P7 | none | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.7/s | Y | Y | |
| 17. | Olympus E-PL10 | none | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.6/s | Y | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that is present on the 40D, but is missing on the E-M10 IV 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 E-M10 IV has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 40D does not have a selfie-screen.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-M10 IV 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-M10 IV 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 40D writes its imaging data to Compact Flash cards, while the E-M10 IV 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 OM-D E-M10 Mark IV and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

| Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 2. | Olympus E-M10 IV | Y | stereo / mono | - | - | micro | 2.0 | Y | - | Y | |
| 3. | Canon 20D | Y | - / - | - | - | - | 1.1 | - | - | - | |
| 4. | Canon 30D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 5. | Canon 50D | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 6. | Canon 60D | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
| 7. | Canon 70D | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
| 8. | Canon 400D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 9. | Canon 450D | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 10. | Canon 1000D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 11. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 12. | Olympus E-30 | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 13. | Olympus E-M10 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
| 14. | Olympus E-M10 II | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
| 15. | Olympus E-M10 III | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
| 16. | Olympus E-P7 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | Y | |
| 17. | Olympus E-PL10 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | Y |
It is notable that the E-M10 IV offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 40D does not provide wifi capability.
Studio photographers will appreciate that the Canon 40D (unlike the E-M10 IV) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The E-M10 IV is a recent model that features in the current product line-up of Olympus. In contrast, the 40D has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the 40D was succeeded by the Canon 50D. Further information on the features and operation of the 40D and E-M10 IV can be found, respectively, in the Canon 40D Manual (free pdf) or the online Olympus E-M10 IV Manual.
Review summary
So what is the bottom line? Is the Canon 40D better than the Olympus E-M10 IV or vice versa? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the Canon EOS 40D:
- 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.
- 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.
- Longer lasting: Can take more shots (750 versus 360) 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 available for much longer (launched in August 2007).

Arguments in favor of the Olympus OM-D E-M10 Mark IV:
- More detail: Has more megapixels (20.2 vs 10.1MP), which boosts linear resolution by 39%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- 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 (0.62x vs 0.59x).
- More detailed LCD: Has a higher resolution rear screen (1040k 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.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (15 vs 6.5 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.
- More compact: Is smaller (122x84mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 439g or 53 percent) and is thus easier to take along.
- Easier travel charging: Can be conveniently charged via its USB port.
- 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.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced category (46 percent cheaper at launch).
- More modern: Reflects 12 years and 11 months of technical progress since the 40D launch.
If the count of individual advantages (bullet points above) is taken as a guide, the E-M10 IV is the clear winner of the contest (22 : 7 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro 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 Olympus E-M10 IV 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 says little about, for example, the shooting experience and imaging performance of the 40D and the E-M10 IV in practical situations. 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 why hands-on reviews by experts are important. 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.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2007 | US$ 1 299 | ebay.com | |
| 2. | Olympus E-M10 IV | 4.5/5 | .. | 5/5 | 81/100 | 4.5/5 | 4.5/5 | Aug 2020 | US$ 699 | amazon.com | |
| 3. | Canon 20D | .. | .. | .. | + + | .. | .. | Aug 2004 | US$ 1 499 | ebay.com | |
| 4. | Canon 30D | .. | + + | .. | + + | o | .. | Feb 2006 | US$ 1 399 | ebay.com | |
| 5. | Canon 50D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2008 | US$ 1 299 | ebay.com | |
| 6. | Canon 60D | 5/5 | + | .. | 79/100 | 4/5 | 4.5/5 | Aug 2010 | US$ 1 399 | ebay.com | |
| 7. | Canon 70D | 5/5 | + + | .. | 83/100 | 4.5/5 | 5/5 | Jul 2013 | US$ 1 199 | ebay.com | |
| 8. | Canon 400D | .. | + + | .. | + + | o | 4/5 | Aug 2006 | US$ 799 | ebay.com | |
| 9. | Canon 450D | .. | + + | .. | + + | 4/5 | 4.5/5 | Jan 2008 | US$ 799 | ebay.com | |
| 10. | Canon 1000D | .. | 82/100 | .. | + + | 3.5/5 | 4.5/5 | Jun 2008 | US$ 449 | ebay.com | |
| 11. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | US$ 1 299 | ebay.com | |
| 12. | Olympus E-30 | .. | .. | .. | 71/100 | 4.5/5 | 4/5 | Nov 2008 | US$ 1 299 | ebay.com | |
| 13. | Olympus E-M10 | 4/5 | .. | .. | 80/100 | 5/5 | 5/5 | Jan 2014 | US$ 699 | ebay.com | |
| 14. | Olympus E-M10 II | 4.5/5 | + + | .. | 80/100 | 5/5 | 5/5 | Aug 2015 | US$ 649 | ebay.com | |
| 15. | Olympus E-M10 III | .. | + | 5/5 | 80/100 | 4.5/5 | 4.5/5 | Aug 2017 | US$ 649 | ebay.com | |
| 16. | Olympus E-P7 | 4/5 | .. | 4.5/5 | .. | .. | 4.5/5 | Jun 2021 | US$ 799 | amazon.com | |
| 17. | Olympus E-PL10 | .. | .. | 4/5 | 77/100 | .. | 4/5 | Oct 2019 | US$ 599 | ebay.com | |
| Note: (+ +) 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. 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.

Check 40D offers at
ebay.com

Check E-M10 IV price at
amazon.com
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 use the search menu below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 40D vs Canon G7 X Mark III
- Canon 40D vs Nikon D3100
- Canon 40D vs Olympus E-P5
- Canon 40D vs Panasonic GF7
- Canon 40D vs Panasonic ZS70
- Canon 40D vs Ricoh GR II
- Canon G7 X Mark III vs Olympus E-M10 IV
- Nikon D7100 vs Olympus E-M10 IV
- Olympus E-M10 IV vs Olympus E-PL9
- Olympus E-M10 IV vs Panasonic GX8
- Olympus E-M10 IV vs Ricoh GR II
- Olympus E-M10 IV vs Sony A7R IIIA
Specifications: Canon 40D vs Olympus E-M10 IV
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 | Olympus E-M10 IV |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Canon EF mount lenses | Micro Four Thirds lenses |
| Launch Date | August 2007 | August 2020 |
| Launch Price | USD 1,299 | USD 699 |
| Sensor Specs | Canon 40D | Olympus E-M10 IV |
| 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 | 20.2 Megapixels |
| Image Resolution | 3888 x 2592 pixels | 5184 x 3888 pixels |
| Pixel Pitch | 5.73 μm | 3.34 μm |
| Pixel Density | 3.03 MP/cm2 | 8.96 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | no Video | 4K/30p Video |
| ISO Setting | 100 - 1,600 ISO | 200 - 25,600 ISO |
| ISO Boost | 100 - 3,200 ISO | 100 - 25,600 ISO |
| Image Processor | DIGIC 3 | TruePic VIII |
| DXO Sensor Quality (score) | 64 | .. |
| DXO Color Depth (bits) | 22.1 | .. |
| DXO Dynamic Range (EV) | 11.3 | .. |
| DXO Low Light (ISO) | 703 | .. |
| Screen Specs | Canon 40D | Olympus E-M10 IV |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 95% | 100% |
| Viewfinder Magnification | 0.59x | 0.62x |
| Viewfinder Resolution | 2360k dots | |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.0inch | 3.0inch |
| LCD Resolution | 230k dots | 1040k dots |
| LCD Attachment | Fixed screen | Tilting screen |
| Touch Input | no Touchscreen | Touchscreen |
| Shooting Specs | Canon 40D | Olympus E-M10 IV |
| Focus System | Phase-detect AF | Contrast-detect AF |
| Manual Focusing Aid | no Peaking Feature | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/4000s |
| Continuous Shooting | 6.5 shutter flaps/s | 15 shutter flaps/s |
| Electronic Shutter | no E-Shutter | up to 1/16000s |
| Time-Lapse Photography | no Intervalometer | Intervalometer built-in |
| Image Stabilization | Lens stabilization only | In-body stabilization |
| Fill Flash | Built-in Flash | Built-in Flash |
| Storage Medium | CF cards | SDXC cards |
| Single or Dual Card Slots | Single card slot | Single card slot |
| Connectivity Specs | Canon 40D | Olympus E-M10 IV |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | no PC Sync |
| USB Connector | USB 2.0 | USB 2.0 |
| HDMI Port | no HDMI | micro HDMI |
| Wifi Support | no Wifi | Wifi built-in |
| Bluetooth Support | no Bluetooth | Bluetooth built-in |
| Body Specs | Canon 40D | Olympus E-M10 IV |
| Battery Type | Canon BP-511A | Olympus BLS-50 |
| Battery Life (CIPA) | 750 shots per charge | 360 shots per charge |
| In-Camera Charging | no USB charging | USB charging |
| Body Dimensions |
146 x 108 x 74 mm (5.7 x 4.3 x 2.9 in) |
122 x 84 x 49 mm (4.8 x 3.3 x 1.9 in) |
| Camera Weight | 822 g (29.0 oz) | 383 g (13.5 oz) |

Check 40D offers at
ebay.com

Check E-M10 IV price at
amazon.com
Did you notice an error on this page? If so, please get in touch, so that we can correct the information.

