Canon G3 X vs OM System OM-3
The Canon PowerShot G3 X and the OM System OM-3 are two digital cameras that were officially introduced, respectively, in June 2015 and February 2025. The G3X is a fixed lens compact, while the OM-3 is a mirrorless interchangeable lens camera. The cameras are based on an one-inch (G3X) and a Four Thirds (OM-3) sensor. The Canon has a resolution of 20 megapixels, whereas the OM System provides 20.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check G3X offers at
ebay.com

Check OM-3 price at
amazon.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon PowerShot G3 X and the OM System OM-3? 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 G3 X and the OM System OM-3 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 dimensions are rounded to the nearest millimeter.
The OM-3 can be obtained in two different colors (black, silver), while the G3X 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 OM System OM-3 is notably larger (31 percent) than the Canon G3 X. 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 and possibly misleading, as the G3X has a lens built in, whereas the OM-3 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the OM-3 and their specifications in the Micro Four Thirds Lens Catalog.
Concerning battery life, the G3X gets 300 shots out of its Canon NB-10L battery, while the OM-3 can take 590 images on a single charge of its OM System BLX-1 power pack. The power pack in the OM-3 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. 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. | Canon G3 X | 123 mm | 77 mm | 105 mm | 733 g | 300 | Y | Jun 2015 | EUR 899 | ebay.com | |
| 2. | OM System OM-3 | 139 mm | 89 mm | 46 mm | 496 g | 590 | Y | Feb 2025 | EUR 1 999 | amazon.com | |
| 3. | Canon 7D II | 149 mm | 112 mm | 78 mm | 910 g | 670 | Y | Sep 2014 | EUR 1 699 | ebay.com | |
| 4. | Canon 70D | 139 mm | 104 mm | 79 mm | 755 g | 920 | Y | Jul 2013 | EUR 1 099 | ebay.com | |
| 5. | Canon 80D | 139 mm | 105 mm | 79 mm | 730 g | 960 | Y | Feb 2016 | EUR 1 285 | ebay.com | |
| 6. | Canon G9 X | 98 mm | 58 mm | 31 mm | 209 g | 220 | n | Oct 2015 | EUR 499 | ebay.com | |
| 7. | Nikon D7200 | 136 mm | 107 mm | 76 mm | 765 g | 1110 | Y | Mar 2015 | EUR 1 179 | ebay.com | |
| 8. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | EUR 1 999 | ebay.com | |
| 9. | Olympus E-M1 III | 134 mm | 91 mm | 69 mm | 580 g | 420 | Y | Feb 2020 | EUR 1 799 | ebay.com | |
| 10. | OM System OM-1 | 135 mm | 92 mm | 73 mm | 599 g | 520 | Y | Feb 2022 | EUR 2 199 | ebay.com | |
| 11. | OM System OM-1 II | 135 mm | 92 mm | 73 mm | 599 g | 500 | Y | Jan 2024 | EUR 2 399 | amazon.com | |
| 12. | OM System OM-5 II | 125 mm | 85 mm | 50 mm | 414 g | 310 | Y | Jun 2025 | EUR 1 299 | amazon.com | |
| 13. | Panasonic FZ1000 | 137 mm | 99 mm | 131 mm | 831 g | 360 | n | Jun 2014 | EUR 899 | ebay.com | |
| 14. | Sony RX10 II | 129 mm | 88 mm | 102 mm | 813 g | 400 | Y | Jun 2015 | EUR 1 599 | ebay.com | |
| 15. | Sony RX10 III | 133 mm | 94 mm | 127 mm | 1051 g | 420 | Y | Mar 2016 | EUR 1 599 | ebay.com | |
| 16. | Sony RX100 IV | 102 mm | 58 mm | 41 mm | 298 g | 280 | n | Jun 2015 | EUR 1 149 | ebay.com | |
| 17. | Sony RX100 V | 102 mm | 58 mm | 41 mm | 299 g | 220 | n | Oct 2016 | EUR 1 199 | ebay.com | |
| Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
The price is, of course, an important factor in any camera decision. The 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 G3X was launched at a lower price than the OM-3, despite having a lens built in. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
Sensor comparison
The size of the sensor inside a digital camera is one of the key determinants of image quality. 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. 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 G3 X features an one-inch sensor and the OM System OM-3 a Four Thirds sensor. The sensor area in the OM-3 is 94 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.7 and 2.0. The sensor in the G3X has a native 3:2 aspect ratio, while the one in the OM-3 offers a 4:3 aspect.

With 20.2MP, the OM-3 offers a higher resolution than the G3X (20MP), but the OM-3 nevertheless has larger individual pixels (pixel pitch of 3.34μm versus 2.41μm for the G3X) due to its larger sensor. Moreover, the OM-3 is a much more recent model (by 9 years and 7 months) than the G3X, and its sensor will 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 OM-3 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The OM-3 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Unlike the G3X, the OM-3 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 PowerShot G3 X has a native sensitivity range from ISO 125 to ISO 12800, which can be extended to ISO 125-25600. The corresponding ISO settings for the OM System OM-3 are ISO 80 to ISO 25600, with the possibility to increase the ISO range to 80-102400.
In terms of underlying technology, the G3X is build around a BSI-CMOS sensor, while the OM-3 uses a Stacked 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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon G3 X | 1-inch | 20.0 | 5472 | 3648 | 1080/60p | 21.4 | 12.3 | 521 | 63 | |
| 2. | OM System OM-3 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.7 | 1852 | 78 | |
| 3. | Canon 7D II | APS-C | 20.0 | 5472 | 3648 | 1080/60p | 22.4 | 11.8 | 1082 | 70 | |
| 4. | Canon 70D | APS-C | 20.0 | 5472 | 3648 | 1080/30p | 22.5 | 11.6 | 926 | 68 | |
| 5. | Canon 80D | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 23.6 | 13.2 | 1135 | 79 | |
| 6. | Canon G9 X | 1-inch | 20.0 | 5472 | 3648 | 1080/60p | 21.5 | 12.3 | 495 | 63 | |
| 7. | Nikon D7200 | APS-C | 24.0 | 6000 | 4000 | 1080/60p | 24.5 | 14.6 | 1333 | 87 | |
| 8. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 9. | Olympus E-M1 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1356 | 76 | |
| 10. | OM System OM-1 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.4 | 1553 | 77 | |
| 11. | OM System OM-1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.6 | 1749 | 78 | |
| 12. | OM System OM-5 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.4 | 13.7 | 1889 | 78 | |
| 13. | Panasonic FZ1000 | 1-inch | 20.0 | 5472 | 3648 | 4K/30p | 22.1 | 11.7 | 517 | 64 | |
| 14. | Sony RX10 II | 1-inch | 20.0 | 5472 | 3648 | 4K/30p | 23.0 | 12.6 | 531 | 70 | |
| 15. | Sony RX10 III | 1-inch | 20.0 | 5472 | 3648 | 4K/30p | 23.1 | 12.6 | 472 | 70 | |
| 16. | Sony RX100 IV | 1-inch | 20.0 | 5472 | 3648 | 4K/30p | 22.8 | 12.6 | 591 | 70 | |
| 17. | Sony RX100 V | 1-inch | 20.0 | 5472 | 3648 | 4K/30p | 22.8 | 12.4 | 586 | 70 | |
| Note: DXO values in italics represent estimates based on sensor size and age. | |||||||||||
Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the OM-3 provides a better video resolution than the G3X. It can shoot movie footage at 4K/60p, while the Canon 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 OM-3 has an electronic viewfinder (2360k dots), which can be very helpful when shooting in bright sunlight. In contrast, the G3X relies on live view and the rear LCD for framing. That said, the G3X can be equipped with an optional viewfinder – the EVF-DC1. The adjacent table lists some of the other core features of the Canon G3 X and OM System OM-3 along with similar information for a selection of comparators.

| Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon G3 X | optional | n | 3.2 / 1620 | tilting | Y | 1/2000s | 5.9/s | Y | Y | |
| 2. | OM System OM-3 | 2360 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 6.0/s | n | Y | |
| 3. | Canon 7D II | optical | Y | 3.0 / 1040 | fixed | n | 1/8000s | 10.0/s | Y | n | |
| 4. | Canon 70D | optical | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 7.0/s | Y | n | |
| 5. | Canon 80D | optical | Y | 3.0 / 1040 | swivel | Y | 1/8000s | 7.0/s | Y | n | |
| 6. | Canon G9 X | none | n | 3.0 / 1040 | fixed | Y | 1/2000s | 6.0/s | Y | Y | |
| 7. | Nikon D7200 | optical | Y | 3.2 / 1229 | fixed | n | 1/8000s | 6.0/s | Y | n | |
| 8. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 9. | Olympus E-M1 III | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 10. | OM System OM-1 | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 11. | OM System OM-1 II | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 12. | OM System OM-5 II | 2360 | n | 3.0 / 1040 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 13. | Panasonic FZ1000 | 2359 | n | 3.0 / 921 | swivel | n | 1/4000s | 12.0/s | Y | Y | |
| 14. | Sony RX10 II | 2359 | Y | 3.0 / 1229 | tilting | n | 1/3200s | 14.0/s | Y | Y | |
| 15. | Sony RX10 III | 2359 | Y | 3.0 / 1229 | tilting | n | 1/2000s | 14.0/s | Y | Y | |
| 16. | Sony RX100 IV | 2359 | n | 3.0 / 1228 | tilting | n | 1/2000s | 16.0/s | Y | Y | |
| 17. | Sony RX100 V | 2359 | n | 3.0 / 1229 | tilting | n | 1/2000s | 24.0/s | Y | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One difference between the cameras concerns the presence of an on-board flash. The G3X has one, while the OM-3 does not. While the built-in flash of the G3X is not very powerful, it can at times be useful as a fill-in light.
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, the OM-3 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 OM System OM-3 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.
Concerning the storage of imaging data, both the G3X and the OM-3 write their files to SDXC cards. The OM-3 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the G3X can use UHS-I cards (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 PowerShot G3 X and OM System OM-3 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 G3 X | Y | stereo / mono | Y | Y | mini | 2.0 | Y | Y | - | |
| 2. | OM System OM-3 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 3. | Canon 7D II | Y | stereo / mono | Y | Y | mini | 3.0 | - | - | - | |
| 4. | Canon 70D | Y | stereo / mono | Y | - | mini | 2.0 | Y | - | - | |
| 5. | Canon 80D | Y | stereo / mono | Y | Y | mini | 2.0 | Y | Y | - | |
| 6. | Canon G9 X | - | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
| 7. | Nikon D7200 | Y | stereo / mono | Y | Y | mini | 2.0 | Y | Y | - | |
| 8. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 9. | Olympus E-M1 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 10. | OM System OM-1 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 11. | OM System OM-1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 12. | OM System OM-5 II | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | Y | |
| 13. | Panasonic FZ1000 | Y | stereo / mono | Y | - | micro | 2.0 | Y | Y | - | |
| 14. | Sony RX10 II | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
| 15. | Sony RX10 III | Y | stereo / mono | Y | Y | micro | 2.0 | Y | Y | - | |
| 16. | Sony RX100 IV | - | stereo / mono | - | - | micro | 2.0 | Y | Y | - | |
| 17. | Sony RX100 V | - | stereo / mono | - | - | micro | 2.0 | Y | Y | - |
The OM-3 is a recent model that features in the current product line-up of OM System. In contrast, the G3X has been discontinued (but can be found pre-owned on ebay). There has not been a direct replacement model for the G3X from Canon. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and OM System websites.
Review summary
So what is the bottom line? Which of the two cameras – the Canon G3 X or the OM System OM-3 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Advantages of the Canon PowerShot G3 X:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- Ready to shoot: Has a lens built-in, whereas the OM-3 requires a separate lens.
- More compact: Is smaller (123x77mm vs 139x89mm) and thus needs less room in the bag.
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More heavily discounted: Has been available for much longer (launched in June 2015).

Arguments in favor of the OM System OM-3:
- 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.
- 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 definition movie capture (4K/60p vs 1080/60p).
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Easier framing: Has an electronic viewfinder for image composition and settings control.
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More flexible: Takes interchangeable lenses and can thus be used with specialty optics.
- Longer lasting: Gets more shots (590 versus 300) out of a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
- More modern: Reflects 9 years and 7 months of technical progress since the G3X launch.
If the number of relative strengths (bullet points above) is taken as a guide, the OM-3 is the clear winner of the contest (20 : 8 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 G3 X and the OM System OM-3 place the cameras among the top in their class? Find out in the latest Best Superzoom 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the G3X or the OM-3. 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 adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon G3 X | 3.5/5 | + | .. | .. | 4.5/5 | 4/5 | Jun 2015 | EUR 899 | ebay.com | |
| 2. | OM System OM-3 | .. | .. | .. | 86/100 | .. | .. | Feb 2025 | EUR 1 999 | amazon.com | |
| 3. | Canon 7D II | 4.5/5 | + | 3.5/5 | 84/100 | 4/5 | 4.5/5 | Sep 2014 | EUR 1 699 | ebay.com | |
| 4. | Canon 70D | 5/5 | + + | .. | 83/100 | 4.5/5 | 5/5 | Jul 2013 | EUR 1 099 | ebay.com | |
| 5. | Canon 80D | 4/5 | + + | 4.5/5 | 84/100 | 4.5/5 | 4.5/5 | Feb 2016 | EUR 1 285 | ebay.com | |
| 6. | Canon G9 X | 3.5/5 | + + | .. | .. | 4.5/5 | 4.5/5 | Oct 2015 | EUR 499 | ebay.com | |
| 7. | Nikon D7200 | 4/5 | + + | .. | 84/100 | 4.5/5 | 4.5/5 | Mar 2015 | EUR 1 179 | ebay.com | |
| 8. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | EUR 1 999 | ebay.com | |
| 9. | Olympus E-M1 III | 5/5 | .. | 5/5 | 83/100 | 4.5/5 | 4/5 | Feb 2020 | EUR 1 799 | ebay.com | |
| 10. | OM System OM-1 | 5/5 | .. | .. | 87/100 | 5/5 | 4.5/5 | Feb 2022 | EUR 2 199 | ebay.com | |
| 11. | OM System OM-1 II | .. | .. | .. | .. | .. | .. | Jan 2024 | EUR 2 399 | amazon.com | |
| 12. | OM System OM-5 II | .. | .. | .. | .. | .. | .. | Jun 2025 | EUR 1 299 | amazon.com | |
| 13. | Panasonic FZ1000 | 4/5 | + + | .. | 82/100 | 4.5/5 | 4.5/5 | Jun 2014 | EUR 899 | ebay.com | |
| 14. | Sony RX10 II | 5/5 | + + | .. | 82/100 | 4.5/5 | 4/5 | Jun 2015 | EUR 1 599 | ebay.com | |
| 15. | Sony RX10 III | 5/5 | + | .. | 84/100 | 4.5/5 | 4.5/5 | Mar 2016 | EUR 1 599 | ebay.com | |
| 16. | Sony RX100 IV | 4.5/5 | + + | .. | 85/100 | 4/5 | 4.5/5 | Jun 2015 | EUR 1 149 | ebay.com | |
| 17. | Sony RX100 V | 4.5/5 | + + | .. | 83/100 | 4/5 | 4.5/5 | Oct 2016 | EUR 1 199 | ebay.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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, please note that some of the review sites have changed their methodology and reporting over time.

Check G3X offers at
ebay.com

Check OM-3 price at
amazon.com
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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon G3 X vs Fujifilm GFX 50S
- Canon G3 X vs Leica D-LUX 5
- Canon G3 X vs Nikon D2X
- Canon G3 X vs Nikon D500
- Canon G3 X vs Sony A99
- Canon G3 X vs Sony H200
- Canon R5 vs OM System OM-3
- Fujifilm X-E4 vs OM System OM-3
- Fujifilm X100V vs OM System OM-3
- Nikon P1100 vs OM System OM-3
- OM System OM-3 vs Panasonic GH6
- OM System OM-3 vs Sony A7C II
Specifications: Canon G3 X vs OM System OM-3
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 G3 X | OM System OM-3 |
|---|---|---|
| Camera Type | Fixed lens compact camera | Mirrorless system camera |
| Camera Lens | 24-600mm f/2.8-5.6 | Micro Four Thirds lenses |
| Launch Date | June 2015 | February 2025 |
| Launch Price | USD 999 | USD 1,999 |
| Sensor Specs | Canon G3 X | OM System OM-3 |
| Sensor Technology | BSI-CMOS | Stacked BSI-CMOS |
| Sensor Format | 1" Sensor | Four Thirds Sensor |
| Sensor Size | 13.2 x 8.8 mm | 17.3 x 13.0 mm |
| Sensor Area | 116.16 mm2 | 224.9 mm2 |
| Sensor Diagonal | 15.9 mm | 21.6 mm |
| Crop Factor | 2.7x | 2.0x |
| Sensor Resolution | 20 Megapixels | 20.2 Megapixels |
| Image Resolution | 5472 x 3648 pixels | 5184 x 3888 pixels |
| Pixel Pitch | 2.41 μm | 3.34 μm |
| Pixel Density | 17.18 MP/cm2 | 8.96 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | 1080/60p Video | 4K/60p Video |
| ISO Setting | 125 - 12,800 ISO | 80 - 25,600 ISO |
| ISO Boost | 125 - 25,600 ISO | 80 - 102,400 ISO |
| Image Processor | DIGIC 6 | TruePic X |
| DXO Sensor Quality (score) | 63 | .. |
| DXO Color Depth (bits) | 21.4 | .. |
| DXO Dynamic Range (EV) | 12.3 | .. |
| DXO Low Light (ISO) | 521 | .. |
| Screen Specs | Canon G3 X | OM System OM-3 |
| Viewfinder Type | Viewfinder optional | Electronic viewfinder |
| Viewfinder Field of View | 100% | |
| Viewfinder Magnification | 0.69x | |
| Viewfinder Resolution | 2360k dots | |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.2inch | 3.0inch |
| LCD Resolution | 1620k dots | 1640k dots |
| LCD Attachment | Tilting screen | Swivel screen |
| Touch Input | Touchscreen | Touchscreen |
| Shooting Specs | Canon G3 X | OM System OM-3 |
| Focus System | Contrast-detect AF | On-Sensor Phase-detect |
| Manual Focusing Aid | Focus Peaking | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/2000s | 1/8000s |
| Continuous Shooting | 5.9 shutter flaps/s | 6 shutter flaps/s |
| Electronic Shutter | no E-Shutter | up to 1/32000s |
| Time-Lapse Photography | no Intervalometer | Intervalometer built-in |
| Image Stabilization | Lens-based stabilization | In-body stabilization |
| Fill Flash | Built-in Flash | no On-Board Flash |
| Storage Medium | SDXC cards | SDXC cards |
| Single or Dual Card Slots | Single card slot | Single card slot |
| UHS card support | UHS-I | UHS-II |
| Connectivity Specs | Canon G3 X | OM System OM-3 |
| External Flash | Hotshoe | Hotshoe |
| USB Connector | USB 2.0 | 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 |
| Near-Field Communication | NFC built-in | no NFC |
| Bluetooth Support | no Bluetooth | Bluetooth built-in |
| Body Specs | Canon G3 X | OM System OM-3 |
| Environmental Sealing | Weathersealed body | Weathersealed body |
| Battery Type | Canon NB-10L | OM System BLX-1 |
| Battery Life (CIPA) | 300 shots per charge | 590 shots per charge |
| In-Camera Charging | no USB charging | USB charging |
| Body Dimensions |
123 x 77 x 105 mm (4.8 x 3.0 x 4.1 in) |
139 x 89 x 46 mm (5.5 x 3.5 x 1.8 in) |
| Camera Weight | 733 g (25.9 oz) | 496 g (17.5 oz) |

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