Canon 1D X Mark III vs Olympus E-M1X
The Canon EOS-1D X Mark III and the Olympus OM-D E-M1X are two digital cameras that were announced, respectively, in January 2020 and January 2019. The 1DX Mark III is a DSLR, while the E-M1X is a mirrorless interchangeable lens camera. The cameras are based on a full frame (1DX Mark III) and a Four Thirds (E-M1X) sensor. The Canon has a resolution of 20 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 1DX Mark III price at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS-1D X Mark III and the Olympus OM-D E-M1X? 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
An illustration of the physical size and weight of the Canon 1D X Mark III and the Olympus E-M1X is provided 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 width, height and depth measures are rounded to the nearest millimeter.
The E-M1X can be obtained in two different colors (black, silver), while the 1DX Mark III 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-M1X is notably smaller (20 percent) than the Canon 1D X Mark III. Moreover, the E-M1X is markedly lighter (31 percent) than the 1DX Mark III. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
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 (1DX Mark III) and the Micro Four Thirds Lens Catalog (E-M1X). Mirrorless cameras, such as the E-M1X, 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 1DX Mark III gets 2850 shots out of its Canon LP-E19 battery, while the E-M1X can take 870 images on a single charge of its Olympus BLH-1 power pack. As can be seen in the images above, both cameras have a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. The power pack in the E-M1X can be charged via the USB port, which can be very convenient when travelling.
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.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 1D X Mark III | 158 mm | 168 mm | 83 mm | 1440 g | 2850 | Y | Jan 2020 | US$ 6 499 | amazon.com | |
| 2. | Olympus E-M1X | 144 mm | 147 mm | 75 mm | 997 g | 870 | Y | Jan 2019 | US$ 2 999 | ebay.com | |
| 3. | Canon 1Ds Mark II | 156 mm | 158 mm | 80 mm | 1215 g | 1200 | Y | Sep 2004 | US$ 7 999 | ebay.com | |
| 4. | Canon 1Ds Mark III | 150 mm | 160 mm | 80 mm | 1385 g | 1800 | Y | Aug 2007 | US$ 7 999 | ebay.com | |
| 5. | Canon 1D C | 158 mm | 164 mm | 83 mm | 1545 g | 1120 | Y | Apr 2012 | US$ 14 999 | ebay.com | |
| 6. | Canon 1D X | 158 mm | 168 mm | 83 mm | 1551 g | 1120 | Y | Oct 2011 | US$ 6 799 | ebay.com | |
| 7. | Canon 1D X Mark II | 158 mm | 168 mm | 83 mm | 1530 g | 1210 | Y | Feb 2016 | US$ 5 999 | ebay.com | |
| 8. | Canon 5D Mark II | 152 mm | 114 mm | 75 mm | 850 g | 850 | Y | Sep 2008 | US$ 3 499 | ebay.com | |
| 9. | Canon 5D Mark III | 152 mm | 116 mm | 76 mm | 950 g | 950 | Y | Mar 2012 | US$ 3 499 | ebay.com | |
| 10. | Canon 6D | 145 mm | 111 mm | 71 mm | 770 g | 1090 | Y | Sep 2012 | US$ 2 099 | ebay.com | |
| 11. | Canon R3 | 150 mm | 143 mm | 87 mm | 1015 g | 760 | Y | Sep 2021 | US$ 5 999 | amazon.com | |
| 12. | Nikon D6 | 160 mm | 163 mm | 92 mm | 1270 g | 3580 | Y | Feb 2020 | US$ 6 499 | amazon.com | |
| 13. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | US$ 1 999 | ebay.com | |
| 14. | Olympus E-M1 III | 134 mm | 91 mm | 69 mm | 580 g | 420 | Y | Feb 2020 | US$ 1 799 | ebay.com | |
| 15. | Olympus E-M5 III | 125 mm | 85 mm | 50 mm | 414 g | 310 | Y | Oct 2019 | US$ 1 199 | ebay.com | |
| 16. | Panasonic G90 | 130 mm | 94 mm | 77 mm | 536 g | 290 | Y | Apr 2019 | US$ 999 | ebay.com | |
| 17. | Panasonic S1 | 149 mm | 110 mm | 97 mm | 1017 g | 400 | Y | Feb 2019 | US$ 2 499 | ebay.com | |
| 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-M1X was launched at a markedly lower price (by 54 percent) than the 1DX Mark III, 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. 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 imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon 1D X Mark III features a full frame sensor and the Olympus E-M1X a Four Thirds sensor. The sensor area in the E-M1X is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the 1DX Mark III has a native 3:2 aspect ratio, while the one in the E-M1X offers a 4:3 aspect.

Despite having a smaller sensor, the E-M1X offers a slightly higher resolution of 20.2 megapixels, compared with 20 MP of the 1DX Mark III. 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 6.57μm for the 1DX Mark III). Moreover, it should be noted that the 1DX Mark III is a somewhat more recent model (by 11 months) than the E-M1X, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the E-M1X has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
Unlike the 1DX Mark III, the E-M1X has the capacity to capture high quality composite images (80MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
The Canon EOS-1D X Mark III has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 50-819200. The corresponding ISO settings for the Olympus OM-D E-M1X are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 64-25600.
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.

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"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 1D X Mark III | Full Frame | 20.0 | 5472 | 3648 | 4K/60p | 24.2 | 14.5 | 3248 | 91 | |
| 2. | Olympus E-M1X | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.2 | 13.0 | 1254 | 75 | |
| 3. | Canon 1Ds Mark II | Full Frame | 16.6 | 4992 | 3328 | none | 23.3 | 11.3 | 1480 | 74 | |
| 4. | Canon 1Ds Mark III | Full Frame | 21.0 | 5616 | 3744 | none | 24.0 | 12.0 | 1663 | 80 | |
| 5. | Canon 1D C | Full Frame | 17.9 | 5184 | 3456 | 4K/24p | 24.3 | 13.0 | 2155 | 85 | |
| 6. | Canon 1D X | Full Frame | 17.9 | 5184 | 3456 | 1080/30p | 23.8 | 11.8 | 2786 | 82 | |
| 7. | Canon 1D X Mark II | Full Frame | 20.0 | 5472 | 3648 | 4K/60p | 24.1 | 13.5 | 3207 | 88 | |
| 8. | Canon 5D Mark II | Full Frame | 21.0 | 5616 | 3744 | 1080/30p | 23.7 | 11.9 | 1815 | 79 | |
| 9. | Canon 5D Mark III | Full Frame | 22.1 | 5760 | 3840 | 1080/30p | 24.0 | 11.7 | 2293 | 81 | |
| 10. | Canon 6D | Full Frame | 20.0 | 5472 | 3648 | 1080/30p | 23.8 | 12.1 | 2340 | 82 | |
| 11. | Canon R3 | Full Frame | 24.0 | 6000 | 4000 | 6K/60p | 25.0 | 14.7 | 4086 | 96 | |
| 12. | Nikon D6 | Full Frame | 20.7 | 5568 | 3712 | 4K/30p | 25.3 | 14.3 | 2886 | 95 | |
| 13. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 14. | Olympus E-M1 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1356 | 76 | |
| 15. | Olympus E-M5 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1324 | 76 | |
| 16. | Panasonic G90 | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.2 | 13.0 | 1273 | 75 | |
| 17. | Panasonic S1 | Full Frame | 24.0 | 6000 | 4000 | 4K/60p | 25.2 | 14.5 | 3333 | 95 | |
| Note: DXO values in italics represent estimates based on sensor size and age. | |||||||||||
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the 1DX Mark III provides a higher frame rate than the E-M1X. It can shoot video footage at 4K/60p, while the Olympus is limited to 4K/30p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-M1X has an electronic viewfinder (2360k dots), while the 1DX Mark III 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the E-M1X has a higher magnification than the one of the 1DX Mark III (0.83x vs 0.76x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Canon 1D X Mark III and Olympus E-M1X in connection with corresponding information for a sample of similar cameras.

| 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 1D X Mark III | optical | Y | 3.2 / 2100 | fixed | Y | 1/8000s | 20.0/s | n | n | |
| 2. | Olympus E-M1X | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 3. | Canon 1Ds Mark II | optical | Y | 2.0 / 230 | fixed | n | 1/8000s | 4.0/s | n | n | |
| 4. | Canon 1Ds Mark III | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 5.0/s | n | n | |
| 5. | Canon 1D C | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 14.0/s | n | n | |
| 6. | Canon 1D X | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 14.0/s | n | n | |
| 7. | Canon 1D X Mark II | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 16.0/s | n | n | |
| 8. | Canon 5D Mark II | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 3.9/s | n | n | |
| 9. | Canon 5D Mark III | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 6.0/s | n | n | |
| 10. | Canon 6D | optical | Y | 3.0 / 1040 | fixed | n | 1/4000s | 4.5/s | n | n | |
| 11. | Canon R3 | 5760 | Y | 3.2 / 4150 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 12. | Nikon D6 | optical | Y | 3.2 / 2359 | fixed | Y | 1/8000s | 14.0/s | n | n | |
| 13. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 14. | Olympus E-M1 III | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 15. | Olympus E-M5 III | 2360 | n | 3.0 / 1040 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 16. | Panasonic G90 | 2360 | n | 3.0 / 1240 | swivel | Y | 1/4000s | 9.0/s | Y | Y | |
| 17. | Panasonic S1 | 5760 | Y | 3.2 / 2100 | full-flex | Y | 1/8000s | 9.0/s | n | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that is present on the 1DX Mark III, but is missing on the E-M1X 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-M1X 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 1DX Mark III 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-M1X 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 Canon 1D X Mark III and the Olympus E-M1X both have 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 1DX Mark III writes its imaging data to CFexpress (type B) cards, while the E-M1X uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.
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-1D X Mark III and Olympus OM-D E-M1X 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 1D X Mark III | Y | mono / mono | Y | Y | mini | 3.1 | Y | - | Y | |
| 2. | Olympus E-M1X | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 3. | Canon 1Ds Mark II | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 4. | Canon 1Ds Mark III | Y | mono / - | - | - | - | 2.0 | - | - | - | |
| 5. | Canon 1D C | Y | mono / mono | Y | Y | mini | 2.0 | - | - | - | |
| 6. | Canon 1D X | Y | mono / - | Y | - | mini | 2.0 | - | - | - | |
| 7. | Canon 1D X Mark II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
| 8. | Canon 5D Mark II | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
| 9. | Canon 5D Mark III | Y | mono / mono | Y | Y | mini | 2.0 | - | - | - | |
| 10. | Canon 6D | Y | mono / mono | Y | - | mini | 2.0 | Y | - | - | |
| 11. | Canon R3 | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 12. | Nikon D6 | Y | stereo / mono | Y | Y | mini | 3.1 | Y | - | Y | |
| 13. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 14. | Olympus E-M1 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 15. | Olympus E-M5 III | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | Y | |
| 16. | Panasonic G90 | Y | stereo / mono | Y | Y | micro | 2.0 | Y | - | Y | |
| 17. | Panasonic S1 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y |
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
Travel and landscape photographers will find it useful that both cameras feature internal geolocalization sensors and can record GPS coordinates in their EXIF data.
The 1DX Mark III is a recent model that features in the current product line-up of Canon. In contrast, the E-M1X has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the E-M1X from Olympus. Further information on the features and operation of the 1DX Mark III and E-M1X can be found, respectively, in the Canon 1D X Mark III Manual (free pdf) or the online Olympus E-M1X Manual.
Review summary
So what conclusions can be drawn? Is the Canon 1D X Mark III better than the Olympus E-M1X or vice versa? The listing below highlights the relative strengths of the two models.

Advantages of the Canon EOS-1D X Mark III:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Features a larger and more technologically advanced imaging sensor.
- Richer colors: The sensor size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
- Better video: Provides higher movie framerates (4K/60p versus 4K/30p).
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (2100k vs 1037k dots).
- Longer lasting: Can take more shots (2850 versus 870) on a single battery charge.
- More modern: Is somewhat more recent (announced 11 months after the E-M1X).

Arguments in favor of the Olympus OM-D E-M1X:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- High quality composites: Can combine several shots after pixel-shifting its sensor.
- More framing info: Has an electronic viewfinder that displays shooting data.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.83x vs 0.76x).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- More compact: Is smaller (144x147mm vs 158x168mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 443g or 31 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.
- More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in January 2019).
If the number of relative strengths (bullet points above) is taken as a guide, the E-M1X emerges as the winner of the match-up (14 : 12 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 1D X Mark III and the Olympus E-M1X 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 incomplete and does no justice, for example, to the way the 1DX Mark III or the E-M1X perform in practice. 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 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.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 1D X Mark III | .. | + + | 5/5 | .. | 4.5/5 | 4/5 | Jan 2020 | US$ 6 499 | amazon.com | |
| 2. | Olympus E-M1X | 4.5/5 | o | 5/5 | 85/100 | 4.5/5 | .. | Jan 2019 | US$ 2 999 | ebay.com | |
| 3. | Canon 1Ds Mark II | .. | .. | .. | + + | .. | .. | Sep 2004 | US$ 7 999 | ebay.com | |
| 4. | Canon 1Ds Mark III | .. | .. | .. | + + | 4.5/5 | .. | Aug 2007 | US$ 7 999 | ebay.com | |
| 5. | Canon 1D C | .. | .. | .. | .. | .. | .. | Apr 2012 | US$ 14 999 | ebay.com | |
| 6. | Canon 1D X | 5/5 | .. | .. | .. | 4.5/5 | 4.5/5 | Oct 2011 | US$ 6 799 | ebay.com | |
| 7. | Canon 1D X Mark II | .. | .. | 4.5/5 | 89/100 | 4.5/5 | 4.5/5 | Feb 2016 | US$ 5 999 | ebay.com | |
| 8. | Canon 5D Mark II | 4/5 | 91/100 | .. | 79/100 | 4/5 | .. | Sep 2008 | US$ 3 499 | ebay.com | |
| 9. | Canon 5D Mark III | .. | + + | .. | 82/100 | 4.5/5 | 4.5/5 | Mar 2012 | US$ 3 499 | ebay.com | |
| 10. | Canon 6D | 5/5 | + + | .. | 83/100 | 4.5/5 | 4.5/5 | Sep 2012 | US$ 2 099 | ebay.com | |
| 11. | Canon R3 | 5/5 | o | 4.5/5 | .. | 5/5 | 4.5/5 | Sep 2021 | US$ 5 999 | amazon.com | |
| 12. | Nikon D6 | .. | .. | 4/5 | .. | 4.5/5 | 4.5/5 | Feb 2020 | US$ 6 499 | amazon.com | |
| 13. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | US$ 1 999 | ebay.com | |
| 14. | Olympus E-M1 III | 5/5 | .. | 5/5 | 83/100 | 4.5/5 | 4/5 | Feb 2020 | US$ 1 799 | ebay.com | |
| 15. | Olympus E-M5 III | 5/5 | + | 5/5 | 82/100 | 4.5/5 | 4.5/5 | Oct 2019 | US$ 1 199 | ebay.com | |
| 16. | Panasonic G90 | 4.5/5 | + | 4.5/5 | 83/100 | 4.5/5 | 4.5/5 | Apr 2019 | US$ 999 | ebay.com | |
| 17. | Panasonic S1 | 4.5/5 | + + | 4.5/5 | 88/100 | 4.5/5 | 4/5 | Feb 2019 | US$ 2 499 | ebay.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The review scores listed above should be treated 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Check 1DX Mark III price at
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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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon 1D X Mark III vs Canon M100
- Canon 1D X Mark III vs Fujifilm X100F
- Canon 1D X Mark III vs Leica M8
- Canon 1D X Mark III vs Nikon 1 J5
- Canon 1D X Mark III vs Nikon B700
- Canon 1D X Mark III vs Panasonic GH7
- Canon R5 C vs Olympus E-M1X
- Canon R6 vs Olympus E-M1X
- Canon T5i vs Olympus E-M1X
- Hasselblad X2D 100C vs Olympus E-M1X
- Olympus E-M1X vs Olympus E-M5
- Olympus E-M1X vs Ricoh WG-6
Specifications: Canon 1D X Mark III vs Olympus E-M1X
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 1D X Mark III | Olympus E-M1X |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Canon EF mount lenses | Micro Four Thirds lenses |
| Launch Date | January 2020 | January 2019 |
| Launch Price | USD 6,499 | USD 2,999 |
| Sensor Specs | Canon 1D X Mark III | Olympus E-M1X |
| Sensor Technology | CMOS | CMOS |
| Sensor Format | Full Frame Sensor | Four Thirds Sensor |
| Sensor Size | 36.0 x 24.0 mm | 17.3 x 13.0 mm |
| Sensor Area | 864 mm2 | 224.9 mm2 |
| Sensor Diagonal | 43.3 mm | 21.6 mm |
| Crop Factor | 1.0x | 2.0x |
| Sensor Resolution | 20 Megapixels | 20.2 Megapixels |
| Image Resolution | 5472 x 3648 pixels | 5184 x 3888 pixels |
| Pixel Pitch | 6.57 μm | 3.34 μm |
| Pixel Density | 2.31 MP/cm2 | 8.96 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | 4K/60p Video | 4K/30p Video |
| ISO Setting | 100 - 102,400 ISO | 200 - 25,600 ISO |
| ISO Boost | 50 - 819,200 ISO | 64 - 25,600 ISO |
| Image Processor | DIGIC X | Dual TruePic VIII |
| DXO Sensor Quality (score) | 91 | .. |
| DXO Color Depth (bits) | 24.2 | .. |
| DXO Dynamic Range (EV) | 14.5 | .. |
| DXO Low Light (ISO) | 3248 | .. |
| Screen Specs | Canon 1D X Mark III | Olympus E-M1X |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.76x | 0.83x |
| Viewfinder Resolution | 2360k dots | |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.2inch | 3.0inch |
| LCD Resolution | 2100k dots | 1037k dots |
| LCD Attachment | Fixed screen | Swivel screen |
| Touch Input | Touchscreen | Touchscreen |
| Shooting Specs | Canon 1D X Mark III | Olympus E-M1X |
| Focus System | Phase-detect AF | On-Sensor Phase-detect |
| Manual Focusing Aid | no Peaking Feature | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/8000s |
| Continuous Shooting | 20 shutter flaps/s | 18 shutter flaps/s |
| Shutter Life Expectancy | 500 000 actuations | 200 000 actuations |
| Electronic Shutter | no E-Shutter | up to 1/32000s |
| Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
| Image Stabilization | Lens stabilization only | In-body stabilization |
| Fill Flash | no On-Board Flash | no On-Board Flash |
| Storage Medium | CFexB cards | SDXC cards |
| Single or Dual Card Slots | Dual card slots | Dual card slots |
| Connectivity Specs | Canon 1D X Mark III | Olympus E-M1X |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | PC Sync socket |
| USB Connector | USB 3.1 | USB 3.0 |
| HDMI Port | mini HDMI | micro HDMI |
| Microphone Port | External MIC port | External MIC port |
| Headphone Socket | Headphone port | Headphone port |
| Wifi Support | Wifi built-in | Wifi built-in |
| Bluetooth Support | Bluetooth built-in | Bluetooth built-in |
| Geotagging | GPS built-in | GPS built-in |
| Body Specs | Canon 1D X Mark III | Olympus E-M1X |
| Environmental Sealing | Weathersealed body | Weathersealed body |
| Battery Type | Canon LP-E19 | Olympus BLH-1 |
| Battery Life (CIPA) | 2850 shots per charge | 870 shots per charge |
| In-Camera Charging | no USB charging | USB charging |
| Body Dimensions |
158 x 168 x 83 mm (6.2 x 6.6 x 3.3 in) |
144 x 147 x 75 mm (5.7 x 5.8 x 3.0 in) |
| Camera Weight | 1440 g (50.8 oz) | 997 g (35.2 oz) |

Check 1DX Mark III price at
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Check E-M1X offers at
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