OM System OM-1 vs Panasonic G1
The OM System OM-1 and the Panasonic Lumix DMC-G1 are two digital cameras that were revealed to the public, respectively, in February 2022 and September 2008. Both the OM-1 and the G1 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The OM System has a resolution of 20.2 megapixels, whereas the Panasonic provides 12 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 OM System OM-1 and the Panasonic Lumix DMC-G1? 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 physical size and weight of the OM System OM-1 and the Panasonic G1 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 measures 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 G1 is notably smaller (16 percent) than the OM System OM-1. Moreover, the G1 is substantially lighter (40 percent) than the OM-1. It is worth mentioning in this context that the OM-1 is splash and dust resistant, while the G1 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. 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 OM-1 gets 520 shots out of its OM System BLX-1 battery, while the G1 can take 410 images on a single charge of its Panasonic DMW-BLB13 power pack. The power pack in the OM-1 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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 |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | OM System OM-1 | 135 mm | 92 mm | 73 mm | 599 g | 520 | Y | Feb 2022 | US$ 2 199 | ebay.com | |
| 2. | Panasonic G1 | 124 mm | 84 mm | 45 mm | 360 g | 410 | n | Sep 2008 | US$ 599 | ebay.com | |
| 3. | Canon R6 Mark II | 138 mm | 98 mm | 88 mm | 670 g | 450 | Y | Nov 2022 | US$ 2 499 | amazon.com | |
| 4. | Nikon Zf | 144 mm | 103 mm | 49 mm | 710 g | 380 | Y | Sep 2023 | US$ 1 999 | amazon.com | |
| 5. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | US$ 1 999 | ebay.com | |
| 6. | Olympus E-M1 III | 134 mm | 91 mm | 69 mm | 580 g | 420 | Y | Feb 2020 | US$ 1 799 | ebay.com | |
| 7. | OM System OM-1 II | 135 mm | 92 mm | 73 mm | 599 g | 500 | Y | Jan 2024 | US$ 2 399 | amazon.com | |
| 8. | OM System OM-3 | 139 mm | 89 mm | 46 mm | 496 g | 590 | Y | Feb 2025 | US$ 1 999 | amazon.com | |
| 9. | OM System OM-5 | 125 mm | 85 mm | 50 mm | 414 g | 310 | Y | Oct 2022 | US$ 1 199 | amazon.com | |
| 10. | Panasonic G2 | 124 mm | 84 mm | 74 mm | 428 g | 360 | n | Mar 2010 | US$ 599 | ebay.com | |
| 11. | Panasonic G9 II | 134 mm | 102 mm | 90 mm | 658 g | 390 | Y | Sep 2023 | US$ 1 899 | amazon.com | |
| 12. | Panasonic G10 | 124 mm | 84 mm | 74 mm | 388 g | 380 | n | Mar 2010 | US$ 499 | ebay.com | |
| 13. | Panasonic GF1 | 119 mm | 71 mm | 36 mm | 385 g | 380 | n | Sep 2009 | US$ 749 | ebay.com | |
| 14. | Panasonic GF2 | 113 mm | 68 mm | 33 mm | 310 g | 300 | n | Nov 2010 | US$ 549 | ebay.com | |
| 15. | Panasonic GH1 | 124 mm | 90 mm | 45 mm | 385 g | 300 | n | Mar 2009 | US$ 899 | ebay.com | |
| 16. | Panasonic GH5 | 139 mm | 98 mm | 87 mm | 725 g | 410 | Y | Jan 2017 | US$ 1 999 | ebay.com | |
| 17. | Panasonic GH5 II | 139 mm | 98 mm | 87 mm | 727 g | 400 | Y | May 2021 | US$ 1 699 | 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 obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The G1 was launched at a markedly lower price (by 73 percent) than the OM-1, 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
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. 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. 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.
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 OM-1 offers a higher resolution of 20.2 megapixels, compared with 12 MP of the G1. This megapixels advantage translates into a 30 percent gain in linear resolution. On the other hand, these sensor specs imply that the OM-1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 4.33μm for the G1). In this context, it should be noted, however, that the OM-1 is much more recent (by 13 years and 5 months) than the G1, 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 the OM-1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the OM System OM-1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the OM-1 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 G1 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 cm for excellent quality prints.
The OM-1 has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Unlike the G1, the OM-1 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 OM System OM-1 has a native sensitivity range from ISO 80 to ISO 25600, which can be extended to ISO 80-102400. The corresponding ISO settings for the Panasonic Lumix DMC-G1 are ISO 100 to ISO 1600, with the possibility to increase the ISO range to 100-3200.
In terms of underlying technology, the OM-1 is build around a Stacked BSI-CMOS sensor, while the G1 uses a 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 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. 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. | OM System OM-1 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.4 | 1553 | 77 | |
| 2. | Panasonic G1 | Four Thirds | 12.0 | 4000 | 3000 | none | 21.1 | 10.3 | 463 | 53 | |
| 3. | Canon R6 Mark II | Full Frame | 24.0 | 6000 | 4000 | 4k/60p | 25.4 | 14.6 | 3154 | 96 | |
| 4. | Nikon Zf | Full Frame | 24.3 | 6048 | 4024 | 4K/60p | 25.4 | 14.7 | 3243 | 96 | |
| 5. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 6. | Olympus E-M1 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1356 | 76 | |
| 7. | OM System OM-1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.6 | 1749 | 78 | |
| 8. | OM System OM-3 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.7 | 1852 | 78 | |
| 9. | OM System OM-5 | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.4 | 13.4 | 1622 | 78 | |
| 10. | Panasonic G2 | Four Thirds | 12.0 | 4000 | 3000 | 720/30p | 21.2 | 10.3 | 493 | 53 | |
| 11. | Panasonic G9 II | Four Thirds | 25.0 | 5776 | 4336 | 5.7K/60p | 23.4 | 13.5 | 1710 | 78 | |
| 12. | Panasonic G10 | Four Thirds | 12.0 | 4000 | 3000 | 720/30p | 21.2 | 10.1 | 411 | 52 | |
| 13. | Panasonic GF1 | Four Thirds | 12.0 | 4000 | 3000 | 720/30p | 21.2 | 10.3 | 513 | 54 | |
| 14. | Panasonic GF2 | Four Thirds | 12.0 | 4000 | 3000 | 1080/60i | 21.2 | 10.3 | 506 | 54 | |
| 15. | Panasonic GH1 | Four Thirds | 12.0 | 4000 | 3000 | 1080/24p | 21.6 | 11.6 | 772 | 64 | |
| 16. | Panasonic GH5 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.9 | 13.0 | 807 | 77 | |
| 17. | Panasonic GH5 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.7 | 13.1 | 1136 | 79 | |
| 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 OM-1 indeed provides movie recording capabilities, while the G1 does not. The highest resolution format that the OM-1 can use is 4K/60p.
Feature comparison
Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the OM-1 offers a substantially higher resolution than the one in the G1 (5760k vs 1440k dots). The following table reports on some other key feature differences and similarities of the OM System OM-1, the Panasonic G1, 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. | OM System OM-1 | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 2. | Panasonic G1 | 1440 | n | 3.0 / 460 | swivel | n | 1/4000s | 3.0/s | Y | n | |
| 3. | Canon R6 Mark II | 3690 | n | 3.0 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 4. | Nikon Zf | 3690 | n | 3.2 / 2100 | swivel | Y | 1/8000s | 14.0/s | n | Y | |
| 5. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 6. | Olympus E-M1 III | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 7. | OM System OM-1 II | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 8. | OM System OM-3 | 2360 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 6.0/s | n | Y | |
| 9. | OM System OM-5 | 2360 | n | 3.0 / 1040 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 10. | Panasonic G2 | 1440 | n | 3.0 / 460 | swivel | Y | 1/4000s | 2.6/s | Y | n | |
| 11. | Panasonic G9 II | 3680 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 12. | Panasonic G10 | 202 | n | 3.0 / 460 | fixed | n | 1/4000s | 2.6/s | Y | n | |
| 13. | Panasonic GF1 | optional | n | 3.0 / 460 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 14. | Panasonic GF2 | optional | n | 3.0 / 460 | fixed | Y | 1/4000s | 2.6/s | Y | n | |
| 15. | Panasonic GH1 | 1440 | n | 3.0 / 460 | swivel | n | 1/4000s | 3.0/s | Y | n | |
| 16. | Panasonic GH5 | 3680 | n | 3.2 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 17. | Panasonic GH5 II | 3680 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that differentiates the OM-1 and the G1 is in-body image stabilization (IBIS). The OM-1 reduces the risk of handshake-induced blur with all attached lenses, while the G1 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, the OM-1 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-1 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 OM-1 writes its imaging data to SDXC cards, while the G1 uses SDHC cards. The OM-1 features dual card slots, which can be very useful in case a memory card fails. In contrast, the G1 only has one slot. The OM-1 supports UHS-II cards (on both slots), while the G1 cannot take advantage of Ultra High Speed SD cards.
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 OM System OM-1 and Panasonic Lumix DMC-G1 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. | OM System OM-1 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 2. | Panasonic G1 | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 3. | Canon R6 Mark II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 4. | Nikon Zf | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 5. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 6. | Olympus E-M1 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 7. | OM System OM-1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 8. | OM System OM-3 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 9. | OM System OM-5 | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | Y | |
| 10. | Panasonic G2 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 11. | Panasonic G9 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 12. | Panasonic G10 | Y | mono / - | - | - | mini | 2.0 | - | - | - | |
| 13. | Panasonic GF1 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 14. | Panasonic GF2 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 15. | Panasonic GH1 | Y | stereo / - | Y | - | mini | 2.0 | - | - | - | |
| 16. | Panasonic GH5 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 17. | Panasonic GH5 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y |
It is notable that the OM-1 offers wifi support, while the G1 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the OM System OM-1 (unlike the G1) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the OM-1 and the G1 have been discontinued, but can regularly be found used on ebay. The G1 was replaced by the Panasonic G2, while the OM-1 was followed by the OM System OM-1 II. Further information on the features and operation of the OM-1 and G1 can be found, respectively, in the OM System OM-1 Manual (free pdf) or the online Panasonic G1 Manual.
Review summary
So how do things add up? Which of the two cameras – the OM System OM-1 or the Panasonic G1 – 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.

Reasons to prefer the OM System OM-1:
- More detail: Offers more megapixels (20.2 vs 12MP) with a 30% 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.
- Broader imaging potential: Can record not only still images but also 4K/60p movies.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 1440k dots).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.82x vs 0.70x).
- More detailed LCD: Has a higher resolution rear screen (1640k vs 460k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (10 vs 3 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- Longer lasting: Can take more shots (520 versus 410) on a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- 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.
- Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards on both slots.
- More modern: Reflects 13 years and 5 months of technical progress since the G1 launch.

Arguments in favor of the Panasonic Lumix DMC-G1:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- More compact: Is smaller (124x84mm vs 135x92mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 239g or 40 percent) and is thus easier to take along.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was introduced into a lower priced category (73 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in September 2008).
If the number of relative strengths (bullet points above) is taken as a guide, the OM-1 is the clear winner of the match-up (24 : 6 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 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 OM System OM-1 and the Panasonic G1 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 says little about, for example, the shooting experience and imaging performance of the OM-1 and the G1 in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
Expert reviews
This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | OM System OM-1 | 5/5 | .. | .. | 87/100 | 5/5 | 4.5/5 | Feb 2022 | US$ 2 199 | ebay.com | |
| 2. | Panasonic G1 | .. | + + | .. | 70/100 | 4/5 | 4.5/5 | Sep 2008 | US$ 599 | ebay.com | |
| 3. | Canon R6 Mark II | 5/5 | + + | 4.5/5 | 91/100 | 4.5/5 | 5/5 | Nov 2022 | US$ 2 499 | amazon.com | |
| 4. | Nikon Zf | 4.5/5 | .. | 4.5/5 | 90/100 | 4.5/5 | 5/5 | Sep 2023 | US$ 1 999 | amazon.com | |
| 5. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | US$ 1 999 | ebay.com | |
| 6. | Olympus E-M1 III | 5/5 | .. | 5/5 | 83/100 | 4.5/5 | 4/5 | Feb 2020 | US$ 1 799 | ebay.com | |
| 7. | OM System OM-1 II | .. | .. | .. | .. | .. | .. | Jan 2024 | US$ 2 399 | amazon.com | |
| 8. | OM System OM-3 | .. | .. | .. | 86/100 | .. | .. | Feb 2025 | US$ 1 999 | amazon.com | |
| 9. | OM System OM-5 | 5/5 | .. | 4.5/5 | 83/100 | 5/5 | 4.5/5 | Oct 2022 | US$ 1 199 | amazon.com | |
| 10. | Panasonic G2 | .. | .. | .. | 72/100 | 4/5 | 4.5/5 | Mar 2010 | US$ 599 | ebay.com | |
| 11. | Panasonic G9 II | 5/5 | .. | 4.5/5 | 87/100 | .. | 4.5/5 | Sep 2023 | US$ 1 899 | amazon.com | |
| 12. | Panasonic G10 | 3/5 | .. | .. | 70/100 | 4/5 | 4/5 | Mar 2010 | US$ 499 | ebay.com | |
| 13. | Panasonic GF1 | .. | 85/100 | .. | 69/100 | 4.5/5 | 4.5/5 | Sep 2009 | US$ 749 | ebay.com | |
| 14. | Panasonic GF2 | 3/5 | 82/100 | .. | 70/100 | 4.5/5 | 4.5/5 | Nov 2010 | US$ 549 | ebay.com | |
| 15. | Panasonic GH1 | .. | + + | .. | 72/100 | 4.5/5 | 4.5/5 | Mar 2009 | US$ 899 | ebay.com | |
| 16. | Panasonic GH5 | 4.5/5 | + + | .. | 85/100 | 4.5/5 | 5/5 | Jan 2017 | US$ 1 999 | ebay.com | |
| 17. | Panasonic GH5 II | 4.5/5 | .. | 4.5/5 | 85/100 | 4.5/5 | 5/5 | May 2021 | US$ 1 699 | amazon.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, 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.

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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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
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- Canon R100 vs OM System OM-1
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- Canon SL3 vs Panasonic G1
- Fujifilm XP140 vs OM System OM-1
- Leica SL2-S vs OM System OM-1
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Specifications: OM System OM-1 vs Panasonic G1
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 | OM System OM-1 | Panasonic G1 |
|---|---|---|
| Camera Type | Mirrorless system camera | Mirrorless system camera |
| Camera Lens | Micro Four Thirds lenses | Micro Four Thirds lenses |
| Launch Date | February 2022 | September 2008 |
| Launch Price | USD 2,199 | USD 599 |
| Sensor Specs | OM System OM-1 | Panasonic G1 |
| Sensor Technology | Stacked BSI-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 | 12 Megapixels |
| Image Resolution | 5184 x 3888 pixels | 4000 x 3000 pixels |
| Pixel Pitch | 3.34 μm | 4.33 μm |
| Pixel Density | 8.96 MP/cm2 | 5.34 MP/cm2 |
| Moiré control | no AA filter | Anti-Alias filter |
| Movie Capability | 4K/60p Video | no Video |
| ISO Setting | 80 - 25,600 ISO | 100 - 1,600 ISO |
| ISO Boost | 80 - 102,400 ISO | 100 - 3,200 ISO |
| Image Processor | TruePic X | Venus HD |
| DXO Sensor Quality (score) | .. | 53 |
| DXO Color Depth (bits) | .. | 21.1 |
| DXO Dynamic Range (EV) | .. | 10.3 |
| DXO Low Light (ISO) | .. | 463 |
| Screen Specs | OM System OM-1 | Panasonic G1 |
| Viewfinder Type | Electronic viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.82x | 0.70x |
| Viewfinder Resolution | 5760k dots | 1440k dots |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.0inch | 3.0inch |
| LCD Resolution | 1640k dots | 460k dots |
| LCD Attachment | Swivel screen | Swivel screen |
| Touch Input | Touchscreen | no Touchscreen |
| Shooting Specs | OM System OM-1 | Panasonic G1 |
| Focus System | On-Sensor Phase-detect | Contrast-detect AF |
| Manual Focusing Aid | Focus Peaking | no Peaking Feature |
| Continuous Shooting | 10 shutter flaps/s | 3 shutter flaps/s |
| Electronic Shutter | up to 1/32000s | no E-Shutter |
| Time-Lapse Photography | Intervalometer built-in | no Intervalometer |
| Image Stabilization | In-body stabilization | Lens stabilization only |
| Fill Flash | no On-Board Flash | Built-in Flash |
| Storage Medium | SDXC cards | SDHC cards |
| Single or Dual Card Slots | Dual card slots | Single card slot |
| UHS card support | Dual UHS-II | no |
| Connectivity Specs | OM System OM-1 | Panasonic G1 |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | no PC Sync |
| USB Connector | USB 3.0 | USB 2.0 |
| HDMI Port | micro HDMI | mini HDMI |
| Microphone Port | External MIC port | no MIC socket |
| Headphone Socket | Headphone port | no Headphone port |
| Wifi Support | Wifi built-in | no Wifi |
| Bluetooth Support | Bluetooth built-in | no Bluetooth |
| Body Specs | OM System OM-1 | Panasonic G1 |
| Environmental Sealing | Weathersealed body | not weather sealed |
| Battery Type | OM System BLX-1 | Panasonic DMW-BLB13 |
| Battery Life (CIPA) | 520 shots per charge | 410 shots per charge |
| In-Camera Charging | USB charging | no USB charging |
| Body Dimensions |
135 x 92 x 73 mm (5.3 x 3.6 x 2.9 in) |
124 x 84 x 45 mm (4.9 x 3.3 x 1.8 in) |
| Camera Weight | 599 g (21.1 oz) | 360 g (12.7 oz) |

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