Olympus E-M1 III vs Panasonic GH5s
The Olympus OM-D E-M1 Mark III and the Panasonic Lumix DC-GH5s are two enthusiast cameras that were revealed to the public, respectively, in February 2020 and January 2018. Both the E-M1 III and the GH5s are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The Olympus has a resolution of 20.2 megapixels, whereas the Panasonic provides 9.9 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check E-M1 III offers at
ebay.com

Check GH5s price at
amazon.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M1 Mark III and the Panasonic Lumix DC-GH5s? 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 Olympus E-M1 III and the Panasonic GH5s is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.



If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic GH5s is notably larger (12 percent) than the Olympus E-M1 III. Moreover, the GH5s is markedly heavier (14 percent) than the E-M1 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Micro Four Thirds Lens Catalog. 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-M1 III gets 420 shots out of its Olympus BLH-1 battery, while the GH5s can take 440 images on a single charge of its Panasonic DMW-BLF19 power pack. The power pack in the E-M1 III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Olympus E-M1 III | 134 mm | 91 mm | 69 mm | 580 g | 420 | Y | Feb 2020 | US$ 1 799 | ebay.com | |
| 2. | Panasonic GH5s | 139 mm | 98 mm | 87 mm | 660 g | 440 | Y | Jan 2018 | US$ 2 499 | amazon.com | |
| 3. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | US$ 1 999 | ebay.com | |
| 4. | Olympus E-M1X | 144 mm | 147 mm | 75 mm | 997 g | 870 | Y | Jan 2019 | US$ 2 999 | ebay.com | |
| 5. | Olympus E-M5 III | 125 mm | 85 mm | 50 mm | 414 g | 310 | Y | Oct 2019 | US$ 1 199 | ebay.com | |
| 6. | OM System OM-1 | 135 mm | 92 mm | 73 mm | 599 g | 520 | Y | Feb 2022 | US$ 2 199 | ebay.com | |
| 7. | OM System OM-3 | 139 mm | 89 mm | 46 mm | 496 g | 590 | Y | Feb 2025 | US$ 1 999 | amazon.com | |
| 8. | Panasonic FZ300 | 132 mm | 92 mm | 117 mm | 691 g | 380 | Y | Jul 2015 | US$ 599 | amazon.com | |
| 9. | Panasonic G9 | 137 mm | 97 mm | 92 mm | 658 g | 400 | Y | Nov 2017 | US$ 1 699 | ebay.com | |
| 10. | Panasonic G97 | 130 mm | 94 mm | 77 mm | 536 g | 290 | Y | Apr 2019 | US$ 749 | ebay.com | |
| 11. | Panasonic G95 | 130 mm | 94 mm | 77 mm | 536 g | 290 | Y | Apr 2019 | US$ 999 | ebay.com | |
| 12. | Panasonic GH3 | 133 mm | 93 mm | 82 mm | 550 g | 540 | Y | Sep 2012 | US$ 1 299 | ebay.com | |
| 13. | Panasonic GH4 | 133 mm | 93 mm | 84 mm | 560 g | 500 | Y | Feb 2014 | US$ 1 499 | ebay.com | |
| 14. | Panasonic GH5 | 139 mm | 98 mm | 87 mm | 725 g | 410 | Y | Jan 2017 | US$ 1 999 | ebay.com | |
| 15. | Panasonic GH5 II | 139 mm | 98 mm | 87 mm | 727 g | 400 | Y | May 2021 | US$ 1 699 | amazon.com | |
| 16. | Panasonic GH7 | 138 mm | 100 mm | 100 mm | 805 g | 380 | Y | Jun 2024 | US$ 2 199 | amazon.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-M1 III was launched at a markedly lower price (by 28 percent) than the GH5s, 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.
Sensor comparison
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

While the two cameras under review share the same sensor size, the E-M1 III offers a higher resolution of 20.2 megapixels, compared with 9.9 MP of the GH5s. This megapixels advantage translates into a 41 percent gain in linear resolution. On the other hand, these sensor specs imply that the E-M1 III has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 4.77μm for the GH5s). In this context, it should be noted, however, that the E-M1 III is much more recent (by 2 years and 1 month) than the GH5s, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.
The resolution advantage of the Olympus E-M1 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M1 III 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 Panasonic GH5s are 18.4 x 13.5 inches or 46.7 x 34.3 cm for good quality, 14.7 x 10.8 inches or 37.4 x 27.4 cm for very good quality, and 12.3 x 9 inches or 31.2 x 22.9 cm for excellent quality prints.
The E-M1 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Unlike the GH5s, the E-M1 III 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-M1 Mark III 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 Panasonic Lumix DC-GH5s are ISO 160 to ISO 51200, with the possibility to increase the ISO range to 80-204800.
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 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.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Olympus E-M1 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1356 | 76 | |
| 2. | Panasonic GH5s | Four Thirds | 9.9 | 3680 | 2700 | 4K/60p | 23.1 | 12.8 | 1154 | 74 | |
| 3. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 4. | Olympus E-M1X | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.2 | 13.0 | 1254 | 75 | |
| 5. | Olympus E-M5 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1324 | 76 | |
| 6. | OM System OM-1 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.4 | 1553 | 77 | |
| 7. | OM System OM-3 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.7 | 1852 | 78 | |
| 8. | Panasonic FZ300 | 1/2.3 | 12.0 | 4000 | 3000 | 4K/30p | 19.3 | 11.0 | 97 | 38 | |
| 9. | Panasonic G9 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.1 | 12.8 | 1138 | 74 | |
| 10. | Panasonic G97 | 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 GH3 | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 22.7 | 12.4 | 812 | 71 | |
| 13. | Panasonic GH4 | Four Thirds | 15.9 | 4608 | 3456 | 4K/30p | 23.2 | 12.8 | 791 | 74 | |
| 14. | Panasonic GH5 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.9 | 13.0 | 807 | 77 | |
| 15. | Panasonic GH5 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.7 | 13.1 | 1136 | 79 | |
| 16. | Panasonic GH7 | Four Thirds | 25.0 | 5776 | 4336 | 5.7K/60p | 23.4 | 13.6 | 1784 | 78 | |
| 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. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the GH5s provides a faster frame rate than the E-M1 III. It can shoot movie footage at 4K/60p, while the Olympus is limited to 4K/30p.
Feature comparison
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 GH5s offers a substantially higher resolution than the one in the E-M1 III (3680k vs 2360k dots). The adjacent table lists some of the other core features of the Olympus E-M1 III and Panasonic GH5s 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. | Olympus E-M1 III | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 2. | Panasonic GH5s | 3680 | n | 3.2 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | n | |
| 3. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 4. | Olympus E-M1X | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 5. | Olympus E-M5 III | 2360 | n | 3.0 / 1040 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 6. | OM System OM-1 | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 7. | OM System OM-3 | 2360 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 6.0/s | n | Y | |
| 8. | Panasonic FZ300 | 1440 | n | 3.0 / 1040 | swivel | Y | 1/4000s | 12.0/s | Y | Y | |
| 9. | Panasonic G9 | 3680 | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 20.0/s | n | Y | |
| 10. | Panasonic G97 | 2360 | n | 3.0 / 1840 | 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 GH3 | 1746 | n | 3.0 / 614 | swivel | Y | 1/4000s | 6.0/s | Y | n | |
| 13. | Panasonic GH4 | 2359 | n | 3.0 / 1036 | swivel | Y | 1/8000s | 12.0/s | Y | n | |
| 14. | Panasonic GH5 | 3680 | n | 3.2 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 15. | Panasonic GH5 II | 3680 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 16. | Panasonic GH7 | 3680 | n | 3.0 / 1840 | full-flex | Y | 1/8000s | 14.0/s | n | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that differentiates the E-M1 III and the GH5s is in-body image stabilization (IBIS). The E-M1 III reduces the risk of handshake-induced blur with all attached lenses, while the GH5s offers no blur reduction with lenses that themselves do not provide optical image stabilization.
Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.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-M1 III and the Panasonic GH5s 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.
Concerning the storage of imaging data, both the E-M1 III and the GH5s write their files to SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. However, while the GH5s supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s) on both slots, the E-M1 III supports UHS-II only on its first slot and UHS-I (data transfer speed up to 104 MB/s) on the second one.
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 Olympus OM-D E-M1 Mark III and Panasonic Lumix DC-GH5s 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. | Olympus E-M1 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 2. | Panasonic GH5s | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 3. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 4. | Olympus E-M1X | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 5. | Olympus E-M5 III | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | Y | |
| 6. | OM System OM-1 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 7. | OM System OM-3 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 8. | Panasonic FZ300 | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
| 9. | Panasonic G9 | Y | stereo / mono | Y | Y | full | 3.0 | Y | - | Y | |
| 10. | Panasonic G97 | 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 GH3 | Y | stereo / mono | Y | Y | mini | 2.0 | Y | - | - | |
| 13. | Panasonic GH4 | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
| 14. | Panasonic GH5 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 15. | Panasonic GH5 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 16. | Panasonic GH7 | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y |
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
The GH5s is a recent model that features in the current product line-up of Panasonic. In contrast, the E-M1 III has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the E-M1 III was succeeded by the OM System OM-1. Further information on the features and operation of the E-M1 III and GH5s can be found, respectively, in the Olympus E-M1 III Manual (free pdf) or the online Panasonic GH5s Manual.
Review summary
So what is the bottom line? Which of the two cameras – the Olympus E-M1 III or the Panasonic GH5s – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

Advantages of the Olympus OM-D E-M1 Mark III:
- More detail: Offers more megapixels (20.2 vs 9.9MP) with a 42% higher linear resolution.
- High quality composites: Can combine several shots after pixel-shifting its sensor.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Faster burst: Shoots at higher frequency (18 vs 12 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (134x91mm vs 139x98mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 80g or 12 percent) and hence easier to carry around.
- Easier travel charging: Can be conveniently charged via its USB port.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- More affordable: Was introduced into a lower priced category (28 percent cheaper at launch).
- More modern: Reflects 2 years and 1 month of technical progress since the GH5s launch.

Arguments in favor of the Panasonic Lumix DC-GH5s:
- Better video: Provides higher movie framerates (4K/60p versus 4K/30p).
- More detailed viewfinder: Has higher resolution electronic viewfinder (3680k vs 2360k dots).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.76x vs 0.74x).
- 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 1037k dots).
- More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
- More heavily discounted: Has been around for much longer (launched in January 2018).
If the count of individual advantages (bullet points above) is taken as a guide, the E-M1 III emerges as the winner of the contest (10 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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-M1 III and the Panasonic GH5s 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the E-M1 III or the GH5s perform in practice. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
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 |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Olympus E-M1 III | 5/5 | .. | 5/5 | 83/100 | 4.5/5 | 4/5 | Feb 2020 | US$ 1 799 | ebay.com | |
| 2. | Panasonic GH5s | .. | .. | 4.5/5 | 84/100 | 4.5/5 | 4.5/5 | Jan 2018 | US$ 2 499 | amazon.com | |
| 3. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | US$ 1 999 | ebay.com | |
| 4. | Olympus E-M1X | 4.5/5 | o | 5/5 | 85/100 | 4.5/5 | .. | Jan 2019 | US$ 2 999 | ebay.com | |
| 5. | Olympus E-M5 III | 5/5 | + | 5/5 | 82/100 | 4.5/5 | 4.5/5 | Oct 2019 | US$ 1 199 | ebay.com | |
| 6. | OM System OM-1 | 5/5 | .. | .. | 87/100 | 5/5 | 4.5/5 | Feb 2022 | US$ 2 199 | ebay.com | |
| 7. | OM System OM-3 | .. | .. | .. | 86/100 | .. | .. | Feb 2025 | US$ 1 999 | amazon.com | |
| 8. | Panasonic FZ300 | .. | + + | .. | .. | 4.5/5 | 4.5/5 | Jul 2015 | US$ 599 | amazon.com | |
| 9. | Panasonic G9 | .. | + + | 5/5 | 85/100 | 5/5 | 5/5 | Nov 2017 | US$ 1 699 | ebay.com | |
| 10. | Panasonic G97 | .. | .. | .. | .. | .. | .. | Apr 2019 | US$ 749 | ebay.com | |
| 11. | Panasonic G95 | 4.5/5 | + | 4.5/5 | 83/100 | 4.5/5 | 4.5/5 | Apr 2019 | US$ 999 | ebay.com | |
| 12. | Panasonic GH3 | 5/5 | + + | .. | 79/100 | 4.5/5 | 4.5/5 | Sep 2012 | US$ 1 299 | ebay.com | |
| 13. | Panasonic GH4 | 5/5 | + + | .. | 85/100 | 5/5 | 5/5 | Feb 2014 | US$ 1 499 | ebay.com | |
| 14. | Panasonic GH5 | 4.5/5 | + + | .. | 85/100 | 4.5/5 | 5/5 | Jan 2017 | US$ 1 999 | ebay.com | |
| 15. | Panasonic GH5 II | 4.5/5 | .. | 4.5/5 | 85/100 | 4.5/5 | 5/5 | May 2021 | US$ 1 699 | amazon.com | |
| 16. | Panasonic GH7 | .. | .. | .. | .. | .. | .. | Jun 2024 | US$ 2 199 | amazon.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
Care should be taken when interpreting the review scores above, 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 E-M1 III offers at
ebay.com

Check GH5s price at
amazon.com
Other camera comparisons
Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon 1D vs Olympus E-M1 III
- Canon 30D vs Panasonic GH5s
- Canon SX620 vs Olympus E-M1 III
- Fujifilm X-H2 vs Panasonic GH5s
- Fujifilm X-T30 vs Olympus E-M1 III
- Leica M-E Typ 240 vs Olympus E-M1 III
- Leica S-E Typ 006 vs Olympus E-M1 III
- Nikon D40X vs Panasonic GH5s
- Nikon D5100 vs Olympus E-M1 III
- Nikon Z9 vs Panasonic GH5s
- Panasonic GH5s vs Samsung NX500
- Panasonic GH5s vs Sony RX10 II
Specifications: Olympus E-M1 III vs Panasonic GH5s
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-M1 III | Panasonic GH5s |
|---|---|---|
| Camera Type | Mirrorless system camera | Mirrorless system camera |
| Camera Lens | Micro Four Thirds lenses | Micro Four Thirds lenses |
| Launch Date | February 2020 | January 2018 |
| Launch Price | USD 1,799 | USD 2,499 |
| Sensor Specs | Olympus E-M1 III | Panasonic GH5s |
| Sensor Technology | CMOS | CMOS |
| Sensor Format | Four Thirds Sensor | Four Thirds Sensor |
| Sensor Size | 17.3 x 13.0 mm | 17.3 x 13.0 mm |
| Sensor Area | 224.9 mm2 | 224.9 mm2 |
| Sensor Diagonal | 21.6 mm | 21.6 mm |
| Crop Factor | 2.0x | 2.0x |
| Sensor Resolution | 20.2 Megapixels | 9.9 Megapixels |
| Image Resolution | 5184 x 3888 pixels | 3680 x 2700 pixels |
| Pixel Pitch | 3.34 μm | 4.77 μm |
| Pixel Density | 8.96 MP/cm2 | 4.42 MP/cm2 |
| Moiré control | no AA filter | no AA filter |
| Movie Capability | 4K/30p Video | 4K/60p Video |
| ISO Setting | 200 - 25,600 ISO | 160 - 51,200 ISO |
| ISO Boost | 64 - 25,600 ISO | 80 - 204,800 ISO |
| Image Processor | TruePic IX | Venus 10 |
| Screen Specs | Olympus E-M1 III | Panasonic GH5s |
| Viewfinder Type | Electronic viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.74x | 0.76x |
| Viewfinder Resolution | 2360k dots | 3680k dots |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.0inch | 3.2inch |
| LCD Resolution | 1037k dots | 1620k dots |
| LCD Attachment | Swivel screen | Swivel screen |
| Touch Input | Touchscreen | Touchscreen |
| Shooting Specs | Olympus E-M1 III | Panasonic GH5s |
| Focus System | On-Sensor Phase-detect | Contrast-detect AF |
| Manual Focusing Aid | Focus Peaking | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/8000s |
| Continuous Shooting | 18 shutter flaps/s | 12 shutter flaps/s |
| Shutter Life Expectancy | 400 000 actuations | 200 000 actuations |
| Electronic Shutter | up to 1/32000s | up to 1/16000s |
| Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
| Image Stabilization | In-body stabilization | Lens stabilization only |
| Fill Flash | no On-Board Flash | no On-Board Flash |
| Storage Medium | SDXC cards | SDXC cards |
| Single or Dual Card Slots | Dual card slots | Dual card slots |
| UHS card support | Single UHS-II | Dual UHS-II |
| Connectivity Specs | Olympus E-M1 III | Panasonic GH5s |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | PC Sync socket |
| USB Connector | USB 3.1 | USB 3.1 |
| 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 |
| Body Specs | Olympus E-M1 III | Panasonic GH5s |
| Environmental Sealing | Weathersealed body | Weathersealed body |
| Battery Type | Olympus BLH-1 | Panasonic DMW-BLF19 |
| Battery Life (CIPA) | 420 shots per charge | 440 shots per charge |
| In-Camera Charging | USB charging | no USB charging |
| Body Dimensions |
134 x 91 x 69 mm (5.3 x 3.6 x 2.7 in) |
139 x 98 x 87 mm (5.5 x 3.9 x 3.4 in) |
| Camera Weight | 580 g (20.5 oz) | 660 g (23.3 oz) |

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