Olympus E-M1X vs Sony A7S III
The Olympus OM-D E-M1X and the Sony Alpha 7S III are two digital cameras that were revealed to the public, respectively, in January 2019 and July 2020. Both the E-M1X and the A7S III are mirrorless interchangeable lens cameras that are based on a Four Thirds (E-M1X) and a full frame (A7S III) sensor. The Olympus has a resolution of 20.2 megapixels, whereas the Sony provides 12 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M1X and the Sony Alpha 7S III? 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.
The physical size and weight of the Olympus E-M1X and the Sony A7S III 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 width, height and depth dimensions are rounded to the nearest millimeter.
The E-M1X can be obtained in two different colors (black, silver), while the A7S 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 Sony A7S III is considerably smaller (42 percent) than the Olympus E-M1X. Moreover, the A7S III is markedly lighter (30 percent) than the E-M1X. 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 Micro Four Thirds Lens Catalog (E-M1X) and the Sony FE Lens Catalog (A7S III). Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.
Concerning battery life, the E-M1X gets 870 shots out of its BLH-1 battery, while the A7S III can take 600 images on a single charge of its NP-FZ100 power pack. As can be seen in the images above, the E-M1X has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the A7S III, Sony provides the VG-C3EM vertical grip as an optional accessory (see here on ebay). The battery packs of both cameras can be charged via USB, 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. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.
|1.||Olympus E-M1X||144 mm||147 mm||75 mm||997 g||870||Y||Jan 2019||2,999||amazon.com|
|2.||Sony A7S III||127 mm||97 mm||81 mm||699 g||600||Y||Jul 2020||3,499||amazon.com|
|3.||Olympus E-M1 III||134 mm||91 mm||69 mm||580 g||420||Y||Feb 2020||1,799||amazon.com|
|4.||Olympus E-M10 IV||122 mm||84 mm||49 mm||383 g||360||n||Aug 2020||699||amazon.com|
|5.||Olympus E-M5 III||125 mm||85 mm||50 mm||414 g||310||Y||Oct 2019||1,199||amazon.com|
|6.||Olympus E-M1 II||134 mm||91 mm||67 mm||574 g||440||Y||Sep 2016||1,999||ebay.com|
|7.||Olympus E-M5 II||124 mm||85 mm||45 mm||469 g||310||Y||Feb 2015||1,099||ebay.com|
|8.||Olympus E-M1||130 mm||94 mm||63 mm||497 g||350||Y||Sep 2013||1,399||ebay.com|
|9.||Panasonic S1||149 mm||110 mm||97 mm||1017 g||400||Y||Feb 2019||2,499||amazon.com|
|10.||Panasonic G90||130 mm||94 mm||77 mm||536 g||290||Y||Apr 2019||999||amazon.com|
|11.||Panasonic G95||130 mm||94 mm||77 mm||536 g||290||Y||Apr 2019||999||amazon.com|
|12.||Panasonic GH5||139 mm||98 mm||87 mm||725 g||410||Y||Jan 2017||1,999||ebay.com|
|13.||Sony A1||129 mm||97 mm||81 mm||737 g||530||Y||Jan 2021||6,499||amazon.com|
|14.||Sony A7 IV||131 mm||96 mm||80 mm||659 g||580||Y||Oct 2021||2,499||amazon.com|
|15.||Sony A7R IV||129 mm||96 mm||78 mm||665 g||670||Y||Jul 2019||3,499||amazon.com|
|16.||Sony A7R II||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999||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 retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The E-M1X was launched at a somewhat lower price (by 14 percent) than the A7S III, which makes it more attractive for photographers on a tight budget. 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.
The size of the imaging sensor is a crucial determinant of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. 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 Olympus E-M1X features a Four Thirds sensor and the Sony A7S III a full frame sensor. The sensor area in the A7S III is 276 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the E-M1X has a native 4:3 aspect ratio, while the one in the A7S III offers a 3:2 aspect.
Despite having a smaller sensor, the Olympus E-M1X offers a higher resolution of 20.2 megapixels, compared with 12 MP of the Sony A7S 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 8.40μm for the A7S III). Moreover, it should be noted that the A7S III is a somewhat more recent model (by 1 year and 6 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 pixel-units. 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.
The resolution advantage of the Olympus E-M1X implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M1X 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 Sony A7S III are 21.2 x 14.2 inches or 53.8 x 36 cm for good quality, 17 x 11.3 inches or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inches or 35.9 x 24 cm for excellent quality prints.
Unlike the A7S 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 Olympus OM-D E-M1X has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 64-25600. The corresponding ISO settings for the Sony Alpha 7S III are ISO 80 to ISO 102400, with the possibility to increase the ISO range to 40-409600.
In terms of underlying technology, the E-M1X is build around a CMOS sensor, while the A7S III uses a BSI-CMOS imager. 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 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|1.||Olympus E-M1X||Four Thirds||20.2||5184||3888||4K/30p||23.2||13.0||1254||75|
|2.||Sony A7S III||Full Frame||12.0||4240||2832||4K/120p||23.7||13.9||2520||86|
|3.||Olympus E-M1 III||Four Thirds||20.2||5184||3888||4K/30p||23.3||13.1||1356||76|
|4.||Olympus E-M10 IV||Four Thirds||20.2||5184||3888||4K/30p||23.3||13.2||1402||76|
|5.||Olympus E-M5 III||Four Thirds||20.2||5184||3888||4K/30p||23.3||13.1||1324||76|
|6.||Olympus E-M1 II||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|7.||Olympus E-M5 II||Four Thirds||15.9||4608||3456||1080/60p||23.0||12.5||842||73|
|8.||Olympus E-M1||Four Thirds||15.9||4608||3456||1080/30p||23.0||12.7||757||73|
|9.||Panasonic S1||Full Frame||24.0||6000||4000||4K/60p||25.2||14.5||3333||95|
|10.||Panasonic G90||Four Thirds||20.2||5184||3888||4K/30p||23.2||13.0||1273||75|
|11.||Panasonic G95||Four Thirds||20.2||5184||3888||4K/30p||23.2||13.0||1273||75|
|12.||Panasonic GH5||Four Thirds||20.2||5184||3888||4K/60p||23.9||13.0||807||77|
|13.||Sony A1||Full Frame||49.8||8640||5760||8k/30p||25.9||14.5||3163||98|
|14.||Sony A7 IV||Full Frame||32.7||7008||4672||4K/60p||25.4||14.7||3379||97|
|15.||Sony A7R IV||Full Frame||60.2||9504||6336||4K/30p||26.0||14.8||3344||99|
|16.||Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|17.||Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|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 also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A7S III provides a faster frame rate than the E-M1X. It can shoot movie footage at 4K/120p, while the Olympus is limited to 4K/30p.
Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A7S III offers a substantially higher resolution than the one in the E-M1X (9440k vs 2360k dots). The adjacent table lists some of the other core features of the Olympus E-M1X and Sony A7S III along with similar information for a selection of comparators.
|1.||Olympus E-M1X||2360||n||3.0 / 1037||swivel||Y||1/8000s||18.0/s||n||Y|
|2.||Sony A7S III||9440||n||3.0 / 1440||swivel||Y||1/8000s||10.0/s||n||Y|
|3.||Olympus E-M1 III||2360||n||3.0 / 1037||swivel||Y||1/8000s||18.0/s||n||Y|
|4.||Olympus E-M10 IV||2360||n||3.0 / 1040||tilting||Y||1/4000s||15.0/s||Y||Y|
|5.||Olympus E-M5 III||2360||n||3.0 / 1040||swivel||Y||1/8000s||10.0/s||n||Y|
|6.||Olympus E-M1 II||2360||n||3.0 / 1037||swivel||Y||1/8000s||18.0/s||n||Y|
|7.||Olympus E-M5 II||2360||n||3.0 / 1037||swivel||Y||1/8000s||10.0/s||n||Y|
|8.||Olympus E-M1||2360||n||3.0 / 1037||tilting||Y||1/8000s||10.0/s||n||Y|
|9.||Panasonic S1||5760||Y||3.2 / 2100||full-flex||Y||1/8000s||9.0/s||n||Y|
|10.||Panasonic G90||2360||n||3.0 / 1240||swivel||Y||1/4000s||9.0/s||Y||Y|
|11.||Panasonic G95||2360||n||3.0 / 1240||swivel||Y||1/4000s||9.0/s||Y||Y|
|12.||Panasonic GH5||3680||n||3.2 / 1620||swivel||Y||1/8000s||12.0/s||n||Y|
|13.||Sony A1||9437||n||3.0 / 1440||tilting||Y||1/8000s||10.0/s||n||Y|
|14.||Sony A7 IV||3686||n||3.0 / 1037||swivel||Y||1/8000s||10.0/s||n||Y|
|15.||Sony A7R IV||5760||n||3.0 / 1440||tilting||Y||1/8000s||10.0/s||n||Y|
|16.||Sony A7R II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|17.||Sony A7S II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
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, both cameras under consideration feature an 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-M1X 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 E-M1X writes its imaging data to SDXC cards, while the A7S III uses CFexpress (type A) or SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Moreover, both the E-M1X and the A7S III support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 MB/s, on both slots.
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 Olympus OM-D E-M1X and Sony Alpha 7S III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Olympus E-M1X||Y||stereo / mono||Y||Y||micro||3.0||Y||-||Y|
|2.||Sony A7S III||Y||stereo / mono||Y||Y||full||3.2||Y||-||Y|
|3.||Olympus E-M1 III||Y||stereo / mono||Y||Y||micro||3.1||Y||-||Y|
|4.||Olympus E-M10 IV||Y||stereo / mono||-||-||micro||2.0||Y||-||Y|
|5.||Olympus E-M5 III||Y||stereo / mono||Y||-||micro||2.0||Y||-||Y|
|6.||Olympus E-M1 II||Y||stereo / mono||Y||Y||micro||3.0||Y||-||-|
|7.||Olympus E-M5 II||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|8.||Olympus E-M1||Y||stereo / mono||Y||-||micro||2.0||Y||-||-|
|9.||Panasonic S1||Y||stereo / mono||Y||Y||full||3.1||Y||-||Y|
|10.||Panasonic G90||Y||stereo / mono||Y||Y||micro||2.0||Y||-||Y|
|11.||Panasonic G95||Y||stereo / mono||Y||Y||micro||2.0||Y||-||Y|
|12.||Panasonic GH5||Y||stereo / mono||Y||Y||full||3.1||Y||-||Y|
|13.||Sony A1||Y||stereo / mono||Y||Y||full||3.2||Y||-||Y|
|14.||Sony A7 IV||Y||stereo / mono||Y||Y||full||3.2||Y||-||Y|
|15.||Sony A7R IV||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|16.||Sony A7R II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony A7S II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
Studio photographers will appreciate that the Olympus E-M1X (unlike the A7S III) 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 E-M1X has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
Both the E-M1X and the A7S III are recent models that are part of the current product line-up. The A7S III replaced the earlier Sony A7S II, while the E-M1X does not have a direct predecessor. Further information on the features and operation of the E-M1X and A7S III can be found, respectively, in the Olympus E-M1X Manual (free pdf) or the online Sony A7S III Manual.
So what conclusions can be drawn? Is there a clear favorite between the Olympus E-M1X and the Sony A7S III? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Olympus OM-D E-M1X:
- More detail: Offers more megapixels (20.2 vs 12MP) with a 27% higher linear resolution.
- 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.
- Faster burst: Shoots at higher frequency (18 vs 10 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
- Longer lasting: Can take more shots (870 versus 600) on a single battery charge.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More affordable: Was introduced into a lower priced segment (14 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in January 2019).
Advantages of the Sony Alpha 7S III:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better image quality: Is equipped with a larger and more technologically advanced 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/120p versus 4K/30p).
- More detailed viewfinder: Has higher resolution electronic viewfinder (9440k vs 2360k dots).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.91x vs 0.83x).
- More detailed LCD: Has a higher resolution rear screen (1440k vs 1037k dots).
- More compact: Is smaller (127x97mm vs 144x147mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 298g or 30 percent) and is thus easier to take along.
- More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
- More modern: Was introduced somewhat (1 year and 6 months) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the A7S III emerges as the winner of the match-up (13 : 11 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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 Olympus E-M1X and the Sony A7S III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.
In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the E-M1X or the A7S III 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.
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.
|1.||Olympus E-M1X||4.5/5||o||5/5||85/100||4.5/5||..||Jan 2019||2,999||amazon.com|
|2.||Sony A7S III||..||+ +||5/5||91/100||4.5/5||5/5||Jul 2020||3,499||amazon.com|
|3.||Olympus E-M1 III||5/5||..||5/5||83/100||4.5/5||4/5||Feb 2020||1,799||amazon.com|
|4.||Olympus E-M10 IV||4.5/5||..||5/5||81/100||4.5/5||4.5/5||Aug 2020||699||amazon.com|
|5.||Olympus E-M5 III||5/5||+||5/5||82/100||4.5/5||4.5/5||Oct 2019||1,199||amazon.com|
|6.||Olympus E-M1 II||5/5||+ +||5/5||85/100||4.5/5||4.5/5||Sep 2016||1,999||ebay.com|
|7.||Olympus E-M5 II||5/5||+ +||4.5/5||81/100||5/5||5/5||Feb 2015||1,099||ebay.com|
|8.||Olympus E-M1||5/5||+ +||..||84/100||4.5/5||4.5/5||Sep 2013||1,399||ebay.com|
|9.||Panasonic S1||4.5/5||+ +||4.5/5||88/100||4.5/5||4/5||Feb 2019||2,499||amazon.com|
|10.||Panasonic G90||4.5/5||+||4.5/5||83/100||4.5/5||4.5/5||Apr 2019||999||amazon.com|
|11.||Panasonic G95||4.5/5||+||4.5/5||83/100||4.5/5||4.5/5||Apr 2019||999||amazon.com|
|12.||Panasonic GH5||4.5/5||+ +||..||85/100||4.5/5||5/5||Jan 2017||1,999||ebay.com|
|13.||Sony A1||5/5||o||4.5/5||93/100||4.5/5||5/5||Jan 2021||6,499||amazon.com|
|14.||Sony A7 IV||5/5||+ +||4.5/5||89/100||4.5/5||4.5/5||Oct 2021||2,499||amazon.com|
|15.||Sony A7R IV||5/5||+||4.5/5||91/100||4.5/5||5/5||Jul 2019||3,499||amazon.com|
|16.||Sony A7R II||5/5||+ +||5/5||90/100||5/5||5/5||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||5/5||+||..||..||4.5/5||5/5||Sep 2015||2,999||ebay.com|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.
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 7D vs Olympus E-M1X
- Canon G3 X vs Olympus E-M1X
- Canon M5 vs Olympus E-M1X
- Leica Q2 vs Sony A7S III
- Leica TL2 vs Sony A7S III
- Nikon P1000 vs Sony A7S III
- Olympus E-M1 vs Sony A7S III
- Olympus E-M1X vs Pentax 645Z
- Olympus E-M1X vs Pentax K-5
- Olympus E-M1X vs Sony A6000
- Panasonic LX100 II vs Sony A7S III
- Sony A7S II vs Sony A7S III
Specifications: Olympus E-M1X vs Sony A7S III
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||Olympus E-M1X||Sony A7S III|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Micro Four Thirds lenses||Sony E mount lenses|
|Launch Date||January 2019||July 2020|
|Launch Price||USD 2,999||USD 3,499|
|Sensor Specs||Olympus E-M1X||Sony A7S III|
|Sensor Format||Four Thirds Sensor||Full Frame Sensor|
|Sensor Size||17.3 x 13.0 mm||35.6 x 23.8 mm|
|Sensor Area||224.9 mm2||847.28 mm2|
|Sensor Diagonal||21.6 mm||42.8 mm|
|Sensor Resolution||20.2 Megapixels||12 Megapixels|
|Image Resolution||5184 x 3888 pixels||4240 x 2832 pixels|
|Pixel Pitch||3.34 μm||8.40 μm|
|Pixel Density||8.96 MP/cm2||1.42 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||4K/30p Video||4K/120p Video|
|ISO Setting||200 - 25,600 ISO||80 - 102,400 ISO|
|ISO Boost||64 - 25,600 ISO||40 - 409,600 ISO|
|Image Processor||Dual TruePic VIII||BIONZ XR|
|DXO Sensor Quality (score)||..||86|
|DXO Color Depth (bits)||..||23.7|
|DXO Dynamic Range (EV)||..||13.9|
|DXO Low Light (ISO)||..||2520|
|Screen Specs||Olympus E-M1X||Sony A7S III|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2360k dots||9440k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||1037k dots||1440k dots|
|LCD Attachment||Swivel screen||Swivel screen|
|Shooting Specs||Olympus E-M1X||Sony A7S III|
|Focus System||On-Sensor Phase-detect||On-Sensor Phase-detect|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/8000s|
|Continuous Shooting||18 shutter flaps/s||10 shutter flaps/s|
|Shutter Life Expectancy||200 000 actuations||200 000 actuations|
|Electronic Shutter||up to 1/32000s||YES|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDXC cards||CFexA or SDXC cards|
|Single or Dual Card Slots||Dual card slots||Dual card slots|
|UHS card support||Dual UHS-II||Dual UHS-II|
|Connectivity Specs||Olympus E-M1X||Sony A7S III|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 3.0||USB 3.2|
|HDMI Port||micro HDMI||full 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||no internal GPS|
|Body Specs||Olympus E-M1X||Sony A7S III|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||870 shots per charge||600 shots per charge|
|In-Camera Charging||USB charging||USB charging|
144 x 147 x 75 mm
(5.7 x 5.8 x 3.0 in)
127 x 97 x 81 mm
(5.0 x 3.8 x 3.2 in)
|Camera Weight||997 g (35.2 oz)||699 g (24.7 oz)|
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