Canon 5D Mark IV vs Olympus E-M10 II
The Canon EOS 5D Mark IV and the Olympus OM-D E-M10 Mark II are two digital cameras that were revealed to the public, respectively, in August 2016 and August 2015. The 5D Mark IV is a DSLR, while the E-M10 II is a mirrorless interchangeable lens camera. The cameras are based on a full frame (5D Mark IV) and a Four Thirds (E-M10 II) sensor. The Canon has a resolution of 30.1 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.

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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 5D Mark IV and the Olympus OM-D E-M10 Mark II? 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 5D Mark IV and the Olympus E-M10 II. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.
The E-M10 II can be obtained in three different colors (black, silver, brown), while the 5D Mark IV 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 II is considerably smaller (43 percent) than the Canon 5D Mark IV. Moreover, the E-M10 II is substantially lighter (56 percent) than the 5D Mark IV. It is worth mentioning in this context that the 5D Mark IV is splash and dust resistant, while the E-M10 II 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 (5D Mark IV) and the Micro Four Thirds Lens Catalog (E-M10 II). Mirrorless cameras, such as the E-M10 II, 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 5D Mark IV gets 900 shots out of its LP-E6N battery, while the E-M10 II can take 320 images on a single charge of its BLS-50 power pack.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 5D Mark IV | 151 mm | 116 mm | 76 mm | 890 g | 900 | Y | Aug 2016 | 3,499 | amazon.com | |
2. | Olympus E-M10 II | 120 mm | 83 mm | 47 mm | 390 g | 320 | n | Aug 2015 | 649 | ebay.com | |
3. | Canon 6D Mark II | 144 mm | 111 mm | 75 mm | 765 g | 1200 | Y | Jun 2017 | 1,999 | amazon.com | |
4. | Canon 1D X Mark II | 158 mm | 168 mm | 83 mm | 1530 g | 1210 | Y | Feb 2016 | 5,999 | ebay.com | |
5. | Canon 80D | 139 mm | 105 mm | 79 mm | 730 g | 960 | Y | Feb 2016 | 1,199 | ebay.com | |
6. | Canon 5DS | 152 mm | 116 mm | 76 mm | 930 g | 700 | Y | Feb 2015 | 3,699 | ebay.com | |
7. | Canon 5DS R | 152 mm | 116 mm | 76 mm | 930 g | 700 | Y | Feb 2015 | 3,699 | ebay.com | |
8. | Canon 5D Mark III | 152 mm | 116 mm | 76 mm | 950 g | 950 | Y | Mar 2012 | 3,499 | ebay.com | |
9. | Canon 6D | 145 mm | 111 mm | 71 mm | 770 g | 1090 | Y | Sep 2012 | 2,099 | ebay.com | |
10. | Canon 5D Mark II | 152 mm | 114 mm | 75 mm | 850 g | 850 | Y | Sep 2008 | 3,499 | ebay.com | |
11. | Nikon D850 | 146 mm | 124 mm | 79 mm | 1005 g | 1840 | Y | Jul 2017 | 3,299 | amazon.com | |
12. | Nikon D810 | 146 mm | 123 mm | 82 mm | 980 g | 1200 | Y | Jun 2014 | 3,299 | ebay.com | |
13. | Olympus E-M10 III | 122 mm | 84 mm | 50 mm | 410 g | 330 | n | Aug 2017 | 649 | ebay.com | |
14. | Olympus E-M5 II | 124 mm | 85 mm | 45 mm | 469 g | 310 | Y | Feb 2015 | 1,099 | ebay.com | |
15. | Olympus E-M10 | 119 mm | 82 mm | 46 mm | 396 g | 320 | n | Jan 2014 | 699 | ebay.com | |
16. | Olympus E-PL7 | 115 mm | 67 mm | 38 mm | 357 g | 350 | n | Aug 2014 | 599 | ebay.com | |
17. | Panasonic GX80 | 122 mm | 71 mm | 44 mm | 426 g | 290 | n | Apr 2016 | 799 | amazon.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 II was launched at a markedly lower price (by 81 percent) than the 5D Mark IV, 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 5D Mark IV features a full frame sensor and the Olympus E-M10 II a Four Thirds sensor. The sensor area in the E-M10 II 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 5D Mark IV has a native 3:2 aspect ratio, while the one in the E-M10 II offers a 4:3 aspect.

With 30.1MP, the 5D Mark IV offers a higher resolution than the E-M10 II (15.9MP), but the 5D Mark IV nevertheless has larger individual pixels (pixel pitch of 5.36μm versus 3.76μm for the E-M10 II) due to its larger sensor. Moreover, the 5D Mark IV is a somewhat more recent model (by 1 year) than the E-M10 II, 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-M10 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Canon 5D Mark IV implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 5D Mark IV for good quality output (200 dots per inch) amounts to 33.6 x 22.4 inches or 85.3 x 56.9 cm, for very good quality (250 dpi) 26.9 x 17.9 inches or 68.3 x 45.5 cm, and for excellent quality (300 dpi) 22.4 x 14.9 inches or 56.9 x 37.9 cm. The corresponding values for the Olympus E-M10 II are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.
The 5D Mark IV has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Canon EOS 5D Mark IV has a native sensitivity range from ISO 100 to ISO 32000, which can be extended to ISO 50-102400. The corresponding ISO settings for the Olympus OM-D E-M10 Mark II 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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 5D Mark IV provides substantially higher image quality than the E-M10 II, with an overall score that is 18 points higher. This advantage is based on 1.7 bits higher color depth, 1.1 EV in additional dynamic range, and 1.8 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.

Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 5D Mark IV | Full Frame | 30.1 | 6720 | 4480 | 4K/30p | 24.8 | 13.6 | 2995 | 91 | |
2. | Olympus E-M10 II | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 23.1 | 12.5 | 842 | 73 | |
3. | Canon 6D Mark II | Full Frame | 26.0 | 6240 | 4160 | 1080/60p | 24.4 | 11.9 | 2862 | 85 | |
4. | Canon 1D X Mark II | Full Frame | 20.0 | 5472 | 3648 | 4K/60p | 24.1 | 13.5 | 3207 | 88 | |
5. | Canon 80D | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 23.6 | 13.2 | 1135 | 79 | |
6. | Canon 5DS | Full Frame | 50.3 | 8688 | 5792 | 1080/30p | 24.7 | 12.4 | 2381 | 87 | |
7. | Canon 5DS R | Full Frame | 50.3 | 8688 | 5792 | 1080/30p | 24.6 | 12.4 | 2308 | 86 | |
8. | Canon 5D Mark III | Full Frame | 22.1 | 5760 | 3840 | 1080/30p | 24.0 | 11.7 | 2293 | 81 | |
9. | Canon 6D | Full Frame | 20.0 | 5472 | 3648 | 1080/30p | 23.8 | 12.1 | 2340 | 82 | |
10. | Canon 5D Mark II | Full Frame | 21.0 | 5616 | 3744 | 1080/30p | 23.7 | 11.9 | 1815 | 79 | |
11. | Nikon D850 | Full Frame | 45.4 | 8256 | 5504 | 4K/30p | 26.4 | 14.8 | 2660 | 100 | |
12. | Nikon D810 | Full Frame | 36.2 | 7360 | 4912 | 1080/60p | 25.7 | 14.8 | 2853 | 97 | |
13. | Olympus E-M10 III | Four Thirds | 15.9 | 4608 | 3456 | 4K/30p | 23.1 | 12.8 | 1120 | 74 | |
14. | Olympus E-M5 II | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 23.0 | 12.5 | 842 | 73 | |
15. | Olympus E-M10 | Four Thirds | 15.9 | 4608 | 3456 | 1080/30p | 22.8 | 12.3 | 884 | 72 | |
16. | Olympus E-PL7 | Four Thirds | 15.9 | 4608 | 3456 | 1080/30p | 22.7 | 12.4 | 873 | 72 | |
17. | Panasonic GX80 | Four Thirds | 15.8 | 4592 | 3448 | 4K/30p | 22.9 | 12.6 | 662 | 71 | |
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. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the 5D Mark IV provides a higher video resolution than the E-M10 II. It can shoot video footage at 4K/30p, while the Olympus is limited to 1080/60p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-M10 II has an electronic viewfinder (2360k dots), while the 5D Mark IV 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 5D Mark IV has a higher magnification than the one of the E-M10 II (0.71x vs 0.62x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 5D Mark IV, the Olympus E-M10 II, and comparable 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 5D Mark IV | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 7.0/s | n | n | |
2. | Olympus E-M10 II | 2360 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.0/s | Y | Y | |
3. | Canon 6D Mark II | optical | Y | 3.0 / 1040 | swivel | Y | 1/4000s | 6.5/s | n | n | |
4. | Canon 1D X Mark II | optical | Y | 3.2 / 1620 | fixed | Y | 1/8000s | 16.0/s | n | n | |
5. | Canon 80D | optical | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 7.0/s | Y | n | |
6. | Canon 5DS | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 5.0/s | n | n | |
7. | Canon 5DS R | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 5.0/s | n | n | |
8. | Canon 5D Mark III | optical | Y | 3.2 / 1040 | fixed | n | 1/8000s | 6.0/s | n | n | |
9. | Canon 6D | optical | Y | 3.0 / 1040 | fixed | n | 1/4000s | 4.5/s | n | n | |
10. | Canon 5D Mark II | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 3.9/s | n | n | |
11. | Nikon D850 | optical | Y | 3.2 / 2359 | tilting | Y | 1/8000s | 9.0/s | n | n | |
12. | Nikon D810 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 5.0/s | Y | n | |
13. | Olympus E-M10 III | 2360 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.6/s | Y | Y | |
14. | Olympus E-M5 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
15. | Olympus E-M10 | 1440 | n | 3.0 / 1037 | tilting | Y | 1/4000s | 8.0/s | Y | Y | |
16. | Olympus E-PL7 | optional | n | 3.0 / 1037 | tilting | Y | 1/4000s | 8.0/s | n | Y | |
17. | Panasonic GX80 | 2765 | n | 3.0 / 1040 | tilting | Y | 1/4000s | 8.0/s | Y | Y | |
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. |
One feature that is present on the 5D Mark IV, but is missing on the E-M10 II 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 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 II 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 5D Mark IV and the Olympus E-M10 II 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 5D Mark IV writes its imaging data to Compact Flash or SDXC cards, while the E-M10 II uses SDXC cards. The 5D Mark IV features dual card slots, which can be very useful in case a memory card fails. In contrast, the E-M10 II only has one slot. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 5D Mark IV and Olympus OM-D E-M10 Mark II 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 5D Mark IV | Y | mono / mono | Y | Y | mini | 3.0 | Y | Y | - | |
2. | Olympus E-M10 II | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
3. | Canon 6D Mark II | Y | stereo / mono | Y | - | mini | 2.0 | Y | Y | Y | |
4. | Canon 1D X Mark II | Y | mono / mono | Y | Y | mini | 3.0 | - | - | - | |
5. | Canon 80D | Y | stereo / mono | Y | Y | mini | 2.0 | Y | Y | - | |
6. | Canon 5DS | Y | mono / mono | Y | - | mini | 3.0 | - | - | - | |
7. | Canon 5DS R | Y | mono / mono | Y | - | mini | 3.0 | - | - | - | |
8. | Canon 5D Mark III | Y | mono / mono | Y | Y | mini | 2.0 | - | - | - | |
9. | Canon 6D | Y | mono / mono | Y | - | mini | 2.0 | Y | - | - | |
10. | Canon 5D Mark II | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
11. | Nikon D850 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | Y | Y | |
12. | Nikon D810 | Y | stereo / mono | Y | Y | mini | 3.0 | Y | - | - | |
13. | Olympus E-M10 III | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
14. | Olympus E-M5 II | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | - | |
15. | Olympus E-M10 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
16. | Olympus E-PL7 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - | |
17. | Panasonic GX80 | Y | stereo / mono | - | - | micro | 2.0 | Y | - | - |
It is notable that the 5D Mark IV has a microphone port, which is missing on the E-M10 II. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
Studio photographers will appreciate that the Canon 5D Mark IV (unlike the E-M10 II) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Travel and landscape photographers will find it useful that the 5D Mark IV has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
The 5D Mark IV is a recent model that features in the current product line-up of Canon. In contrast, the E-M10 II has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-M10 II was succeeded by the Olympus E-M10 III. Further information on the features and operation of the 5D Mark IV and E-M10 II can be found, respectively, in the Canon 5D Mark IV Manual (free pdf) or the online Olympus E-M10 II Manual.
Review summary
So what is the bottom line? Is there a clear favorite between the Canon 5D Mark IV and the Olympus E-M10 II? Which camera is better? The listing below highlights the relative strengths of the two models.

Arguments in favor of the Canon EOS 5D Mark IV:
- More detail: Offers more megapixels (30.1 vs 15.9MP) with a 40% higher linear resolution.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Scores substantially higher (18 points) in the DXO overall assessment.
- Richer colors: Generates images with noticeably better colors (1.7 bits more color depth).
- More dynamic range: Captures a larger spectrum of light and dark details (1.1 EV of extra DR).
- Better low-light sensitivity: Requires less light for good images (1.8 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Better sound control: Has a headphone port that enables audio monitoring while recording.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.71x vs 0.62x).
- 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 (1620k vs 1040k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Longer lasting: Can take more shots (900 versus 320) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More modern: Is somewhat more recent (announced 1 year after the E-M10 II).

Reasons to prefer the Olympus OM-D E-M10 Mark II:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster burst: Shoots at higher frequency (8 vs 7 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- More compact: Is smaller (120x83mm vs 151x116mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 500g or 56 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.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was introduced into a lower priced category (81 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in August 2015).
If the count of individual advantages (bullet points above) is taken as a guide, the 5D Mark IV is the clear winner of the match-up (24 : 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 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.
How about other alternatives? Do the specifications of the Canon 5D Mark IV and the Olympus E-M10 II 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 5D Mark IV or the E-M10 II perform in practice. 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 where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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 (USD) |
Street Price |
||
---|---|---|---|---|---|---|---|---|---|---|---|
1. | Canon 5D Mark IV | 4.5/5 | + + | 4/5 | 87/100 | 4.5/5 | 4.5/5 | Aug 2016 | 3,499 | amazon.com | |
2. | Olympus E-M10 II | 4.5/5 | + + | .. | 80/100 | 5/5 | 5/5 | Aug 2015 | 649 | ebay.com | |
3. | Canon 6D Mark II | 4/5 | + | 4/5 | 80/100 | 4.5/5 | 4/5 | Jun 2017 | 1,999 | amazon.com | |
4. | Canon 1D X Mark II | .. | .. | 4.5/5 | 89/100 | 4.5/5 | 4.5/5 | Feb 2016 | 5,999 | ebay.com | |
5. | Canon 80D | 4/5 | + + | 4.5/5 | 84/100 | 4.5/5 | 4.5/5 | Feb 2016 | 1,199 | ebay.com | |
6. | Canon 5DS | .. | + | .. | 83/100 | 4.5/5 | 4.5/5 | Feb 2015 | 3,699 | ebay.com | |
7. | Canon 5DS R | 5/5 | + | .. | 83/100 | 5/5 | 4.5/5 | Feb 2015 | 3,699 | ebay.com | |
8. | Canon 5D Mark III | .. | + + | .. | 82/100 | 4.5/5 | 4.5/5 | Mar 2012 | 3,499 | ebay.com | |
9. | Canon 6D | 5/5 | + + | .. | 83/100 | 4.5/5 | 4.5/5 | Sep 2012 | 2,099 | ebay.com | |
10. | Canon 5D Mark II | 4/5 | 91/100 | .. | 79/100 | 4/5 | .. | Sep 2008 | 3,499 | ebay.com | |
11. | Nikon D850 | 4.5/5 | + + | 5/5 | 89/100 | 4.5/5 | 5/5 | Jul 2017 | 3,299 | amazon.com | |
12. | Nikon D810 | 5/5 | .. | 5/5 | 86/100 | 5/5 | 4.5/5 | Jun 2014 | 3,299 | ebay.com | |
13. | Olympus E-M10 III | .. | + | 5/5 | 80/100 | 4.5/5 | 4.5/5 | Aug 2017 | 649 | ebay.com | |
14. | Olympus E-M5 II | 5/5 | + + | 4.5/5 | 81/100 | 5/5 | 5/5 | Feb 2015 | 1,099 | ebay.com | |
15. | Olympus E-M10 | 4/5 | .. | .. | 80/100 | 5/5 | 5/5 | Jan 2014 | 699 | ebay.com | |
16. | Olympus E-PL7 | 4/5 | + | .. | .. | 5/5 | 4/5 | Aug 2014 | 599 | ebay.com | |
17. | Panasonic GX80 | 4.5/5 | + + | .. | 82/100 | 5/5 | 5/5 | Apr 2016 | 799 | amazon.com | |
Notes: (+ +) 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. 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, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons
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Specifications: Canon 5D Mark IV vs Olympus E-M10 II
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 5D Mark IV | Olympus E-M10 II |
Camera Type | Digital single lens reflex | Mirrorless system camera |
Camera Lens | Canon EF mount lenses | Micro Four Thirds lenses |
Launch Date | August 2016 | August 2015 |
Launch Price | USD 3,499 | USD 649 |
Sensor Specs | Canon 5D Mark IV | Olympus E-M10 II |
---|---|---|
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 | 30.1 Megapixels | 15.9 Megapixels |
Image Resolution | 6720 x 4480 pixels | 4608 x 3456 pixels |
Pixel Pitch | 5.36 μm | 3.76 μm |
Pixel Density | 3.48 MP/cm2 | 7.08 MP/cm2 |
Moiré control | Anti-Alias filter | no AA filter |
Movie Capability | 4K/30p Video | 1080/60p Video |
ISO Setting | 100 - 32,000 ISO | 200 - 25,600 ISO |
ISO Boost | 50 - 102,400 ISO | 100 - 25,600 ISO |
Image Processor | DIGIC 6+ | TruePic VII |
DXO Sensor Quality (score) | 91 | 73 |
DXO Color Depth (bits) | 24.8 | 23.1 |
DXO Dynamic Range (EV) | 13.6 | 12.5 |
DXO Low Light (ISO) | 2995 | 842 |
Screen Specs | Canon 5D Mark IV | Olympus E-M10 II |
Viewfinder Type | Optical viewfinder | Electronic viewfinder |
Viewfinder Field of View | 100% | 100% |
Viewfinder Magnification | 0.71x | 0.62x |
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 | 1620k dots | 1040k dots |
LCD Attachment | Fixed screen | Tilting screen |
Touch Input | Touchscreen | Touchscreen |
Shooting Specs | Canon 5D Mark IV | Olympus E-M10 II |
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 | 7 shutter flaps/s | 8 shutter flaps/s |
Electronic Shutter | no E-Shutter | up to 1/16000s |
Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
Image Stabilization | Lens stabilization only | In-body stabilization |
Fill Flash | no On-Board Flash | Built-in Flash |
Storage Medium | CF or SDXC cards | SDXC cards |
Single or Dual Card Slots | Dual card slots | Single card slot |
UHS card support | UHS-I | UHS-I |
Connectivity Specs | Canon 5D Mark IV | Olympus E-M10 II |
External Flash | Hotshoe | Hotshoe |
Studio Flash | PC Sync socket | no PC Sync |
USB Connector | USB 3.0 | USB 2.0 |
HDMI Port | mini HDMI | micro HDMI |
Microphone Port | External MIC port | no MIC socket |
Headphone Socket | Headphone port | no Headphone port |
Wifi Support | Wifi built-in | Wifi built-in |
Near-Field Communication | NFC built-in | no NFC |
Geotagging | GPS built-in | no internal GPS |
Body Specs | Canon 5D Mark IV | Olympus E-M10 II |
Environmental Sealing | Weathersealed body | not weather sealed |
Battery Type | LP-E6N | BLS-50 |
Battery Life (CIPA) | 900 shots per charge | 320 shots per charge |
Body Dimensions |
151 x 116 x 76 mm (5.9 x 4.6 x 3.0 in) |
120 x 83 x 47 mm (4.7 x 3.3 x 1.9 in) |
Camera Weight | 890 g (31.4 oz) | 390 g (13.8 oz) |

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