Leica SL3-S vs OM System OM-1
The Leica SL3-S and the OM System OM-1 are two enthusiast cameras that were officially introduced, respectively, in January 2025 and February 2022. Both the Leica SL3-S and the OM-1 are mirrorless interchangeable lens cameras that are based on a full frame (Leica SL3-S) and a Four Thirds (OM-1) sensor. The Leica has a resolution of 24 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 Leica SL3-S price at
amazon.com

Check OM-1 offers at
ebay.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Leica SL3-S and the OM System OM-1? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
Body comparison
The side-by-side display below illustrates the physical size and weight of the Leica SL3-S and the OM System OM-1. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. 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 OM System OM-1 is notably smaller (18 percent) than the Leica SL3-S. Moreover, the OM-1 is markedly lighter (30 percent) than the Leica SL3-S. 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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
Concerning battery life, the Leica SL3-S gets 315 shots out of its Leica BP-SCL6 battery, while the OM-1 can take 520 images on a single charge of its OM System BLX-1 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Leica SL3-S | 141 mm | 108 mm | 85 mm | 852 g | 315 | Y | Jan 2025 | US$ 5 299 | amazon.com | |
| 2. | OM System OM-1 | 135 mm | 92 mm | 73 mm | 599 g | 520 | Y | Feb 2022 | US$ 2 199 | ebay.com | |
| 3. | Canon R1 | 158 mm | 150 mm | 87 mm | 1115 g | 1330 | Y | Jul 2024 | US$ 6 299 | amazon.com | |
| 4. | Canon R3 | 150 mm | 143 mm | 87 mm | 1015 g | 760 | Y | Sep 2021 | US$ 5 999 | amazon.com | |
| 5. | Leica SL2 | 146 mm | 107 mm | 42 mm | 953 g | 370 | Y | Nov 2019 | US$ 5 999 | amazon.com | |
| 6. | Leica SL2-S | 146 mm | 107 mm | 83 mm | 931 g | 510 | Y | Dec 2020 | US$ 4 899 | amazon.com | |
| 7. | Leica SL3 | 141 mm | 108 mm | 85 mm | 854 g | 320 | Y | Mar 2024 | US$ 6 999 | amazon.com | |
| 8. | Nikon Z5 II | 134 mm | 101 mm | 72 mm | 700 g | 330 | Y | Apr 2025 | US$ 1 699 | amazon.com | |
| 9. | Olympus E-M1 II | 134 mm | 91 mm | 67 mm | 574 g | 440 | Y | Sep 2016 | US$ 1 999 | ebay.com | |
| 10. | Olympus E-M1 III | 134 mm | 91 mm | 69 mm | 580 g | 420 | Y | Feb 2020 | US$ 1 799 | ebay.com | |
| 11. | OM System OM-1 II | 135 mm | 92 mm | 73 mm | 599 g | 500 | Y | Jan 2024 | US$ 2 399 | amazon.com | |
| 12. | OM System OM-3 | 139 mm | 89 mm | 46 mm | 496 g | 590 | Y | Feb 2025 | US$ 1 999 | amazon.com | |
| 13. | Panasonic GH5 | 139 mm | 98 mm | 87 mm | 725 g | 410 | Y | Jan 2017 | US$ 1 999 | ebay.com | |
| 14. | Panasonic S1 II | 134 mm | 102 mm | 92 mm | 800 g | 350 | Y | May 2025 | US$ 3 199 | amazon.com | |
| 15. | Panasonic S5 | 133 mm | 98 mm | 82 mm | 714 g | 440 | Y | Sep 2020 | US$ 1 999 | amazon.com | |
| 16. | Panasonic S5 II | 134 mm | 102 mm | 90 mm | 740 g | 370 | Y | Jan 2023 | US$ 1 999 | amazon.com | |
| 17. | Sony A9 III | 136 mm | 97 mm | 83 mm | 702 g | 530 | Y | Nov 2023 | US$ 5 999 | amazon.com | |
| Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The OM-1 was launched at a markedly lower price (by 59 percent) than the Leica SL3-S, 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. 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.
Of the two cameras under consideration, the Leica SL3-S features a full frame sensor and the OM System OM-1 a Four Thirds sensor. The sensor area in the OM-1 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the Leica SL3-S has a native 3:2 aspect ratio, while the one in the OM-1 offers a 4:3 aspect.

With 24MP, the Leica SL3-S offers a higher resolution than the OM-1 (20.2MP), but the Leica SL3-S nevertheless has larger individual pixels (pixel pitch of 6.00μm versus 3.34μm for the OM-1) due to its larger sensor. Moreover, the Leica SL3-S is a much more recent model (by 2 years and 11 months) than the OM-1, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that 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 Leica SL3-S implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Leica SL3-S for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the OM System OM-1 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.
Both cameras have the capacity to capture high quality composite images by combining multiple shots after shifting the sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
The Leica SL3-S has a native sensitivity range from ISO 100 to ISO 50000, which can be extended to ISO 50-100000. The corresponding ISO settings for the OM System OM-1 are ISO 80 to ISO 25600, with the possibility to increase the ISO range to 80-102400.
In terms of underlying technology, the Leica SL3-S is build around a CMOS sensor, while the OM-1 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.

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. | Leica SL3-S | Full Frame | 24.0 | 6000 | 4000 | 6K/30p | 25.4 | 14.8 | 3383 | 97 | |
| 2. | OM System OM-1 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.4 | 1553 | 77 | |
| 3. | Canon R1 | Full Frame | 24.0 | 6000 | 4000 | 6K/60p | 25.4 | 14.8 | 3332 | 97 | |
| 4. | Canon R3 | Full Frame | 24.0 | 6000 | 4000 | 6K/60p | 25.0 | 14.7 | 4086 | 96 | |
| 5. | Leica SL2 | Full Frame | 46.7 | 8368 | 5584 | 4K/60p | 25.3 | 14.3 | 2866 | 95 | |
| 6. | Leica SL2-S | Full Frame | 24.0 | 6000 | 4000 | 4K/60p | 25.2 | 14.1 | 3504 | 95 | |
| 7. | Leica SL3 | Full Frame | 60.3 | 9520 | 6336 | 8K/30p | 25.4 | 14.8 | 3295 | 97 | |
| 8. | Nikon Z5 II | Full Frame | 24.4 | 6048 | 4032 | 4K/60p | 25.4 | 14.8 | 3398 | 97 | |
| 9. | Olympus E-M1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.7 | 12.8 | 1312 | 80 | |
| 10. | Olympus E-M1 III | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.1 | 1356 | 76 | |
| 11. | OM System OM-1 II | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.6 | 1749 | 78 | |
| 12. | OM System OM-3 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.4 | 13.7 | 1852 | 78 | |
| 13. | Panasonic GH5 | Four Thirds | 20.2 | 5184 | 3888 | 4K/60p | 23.9 | 13.0 | 807 | 77 | |
| 14. | Panasonic S1 II | Full Frame | 24.0 | 6000 | 4000 | 6K/30p | 25.4 | 14.8 | 3406 | 97 | |
| 15. | Panasonic S5 | Full Frame | 24.0 | 6000 | 4000 | 4K/60p | 25.1 | 14.5 | 2697 | 94 | |
| 16. | Panasonic S5 II | Full Frame | 24.0 | 6000 | 4000 | 6K/30p | 25.4 | 14.6 | 3158 | 96 | |
| 17. | Sony A9 III | Full Frame | 24.0 | 6000 | 4000 | 4K/120p | 25.4 | 14.7 | 3243 | 96 | |
| 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 are equipped with sensors that have a sufficiently high read-out speed for moving images, but the Leica SL3-S provides a higher video resolution than the OM-1. It can shoot video footage at 6K/30p, while the OM System is limited to 4K/60p.
Feature comparison
Apart from body and sensor, cameras can and do differ across a variety of features. The Leica SL3-S and the OM-1 are similar in the sense that both feature an electronic viewfinder, which is helpful when framing images in bright sunlight. Moreover, their viewfinders offer an identical resolution of 5760k dots. The table below summarizes some of the other core capabilities of the Leica SL3-S and OM System OM-1 in connection with corresponding information for a sample of similar 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. | Leica SL3-S | 5760 | Y | 3.2 / 2333 | tilting | Y | 1/8000s | 30.0/s | n | Y | |
| 2. | OM System OM-1 | 5760 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 10.0/s | n | Y | |
| 3. | Canon R1 | 9440 | Y | 3.2 / 2100 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 4. | Canon R3 | 5760 | Y | 3.2 / 4150 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 5. | Leica SL2 | 5760 | Y | 3.2 / 2100 | fixed | Y | 1/8000s | 10.0/s | n | Y | |
| 6. | Leica SL2-S | 5760 | Y | 3.2 / 2100 | fixed | Y | 1/8000s | 20.0/s | n | Y | |
| 7. | Leica SL3 | 5760 | Y | 3.2 / 2333 | tilting | Y | 1/8000s | 5.0/s | n | Y | |
| 8. | Nikon Z5 II | 3690 | n | 3.2 / 2100 | swivel | Y | 1/8000s | 14.0/s | n | Y | |
| 9. | Olympus E-M1 II | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/s | n | Y | |
| 10. | Olympus E-M1 III | 2360 | n | 3.0 / 1037 | swivel | Y | 1/8000s | 18.0/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-3 | 2360 | n | 3.0 / 1640 | swivel | Y | 1/8000s | 6.0/s | n | Y | |
| 13. | Panasonic GH5 | 3680 | n | 3.2 / 1620 | swivel | Y | 1/8000s | 12.0/s | n | Y | |
| 14. | Panasonic S1 II | 5760 | n | 3.2 / 1840 | full-flex | Y | 1/8000s | 10.0/s | n | Y | |
| 15. | Panasonic S5 | 2360 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 7.0/s | n | Y | |
| 16. | Panasonic S5 II | 3680 | n | 3.0 / 1840 | swivel | Y | 1/8000s | 9.0/s | n | Y | |
| 17. | Sony A9 III | 9440 | n | 3.2 / 2100 | full-flex | Y | 1/80000s | 120.0/s | n | Y | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that is present on the Leica SL3-S, but is missing on the OM-1 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.
The OM-1 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the Leica SL3-S does not have a selfie-screen.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 Leica SL3-S and the OM System OM-1 both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The Leica SL3-S writes its imaging data to CFexpress (type B) or SDXC cards, while the OM-1 uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Moreover, both cameras support UHS-II cards (Ultra High Speed data transfer of up to 312 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 Leica SL3-S and OM System OM-1 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. | Leica SL3-S | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 2. | OM System OM-1 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 3. | Canon R1 | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 4. | Canon R3 | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 5. | Leica SL2 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 6. | Leica SL2-S | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 7. | Leica SL3 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 8. | Nikon Z5 II | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 9. | Olympus E-M1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | - | |
| 10. | Olympus E-M1 III | Y | stereo / mono | Y | Y | micro | 3.1 | Y | - | Y | |
| 11. | OM System OM-1 II | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 12. | OM System OM-3 | Y | stereo / mono | Y | Y | micro | 3.0 | Y | - | Y | |
| 13. | Panasonic GH5 | Y | stereo / mono | Y | Y | full | 3.1 | Y | - | Y | |
| 14. | Panasonic S1 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 15. | Panasonic S5 | Y | stereo / mono | Y | Y | micro | 3.2 | Y | - | Y | |
| 16. | Panasonic S5 II | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y | |
| 17. | Sony A9 III | Y | stereo / mono | Y | Y | full | 3.2 | Y | - | Y |
Studio photographers will appreciate that the OM System OM-1 (unlike the Leica SL3-S) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The Leica SL3-S is a recent model that features in the current product line-up of Leica. In contrast, the OM-1 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the OM-1 was succeeded by the OM System OM-1 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Leica and OM System websites.
Review summary
So what conclusions can be drawn? Is the Leica SL3-S better than the OM System OM-1 or vice versa? A synthesis of the relative strong points of each of the models is listed below.

Arguments in favor of the Leica SL3-S:
- More detail: Offers more megapixels (24 vs 20.2MP) with a 11% higher linear resolution.
- Better image quality: Features a larger and more technologically advanced imaging 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 (6K/30p vs 4K/60p).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (2333k vs 1640k dots).
- Faster burst: Shoots at higher frequency (30 vs 10 flaps/sec) to capture the decisive moment.
- More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
- More prestigious: Has the Leica luxury appeal, which ensures a high resale price.
- More modern: Reflects 2 years and 11 months of technical progress since the OM-1 launch.

Advantages of the OM System OM-1:
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.82x vs 0.76x).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- More compact: Is smaller (135x92mm vs 141x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 253g or 30 percent) and is thus easier to take along.
- Longer lasting: Gets more shots (520 versus 315) out of a single battery charge.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More affordable: Was introduced into a lower priced category (59 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in February 2022).
If the count of relative strengths (bullet points above) is taken as a measure, the Leica SL3-S is the clear winner of the match-up (13 : 9 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 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 Leica SL3-S and the OM System OM-1 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 Leica SL3-S and the OM-1 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
Expert reviews
This is 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. | Leica SL3-S | .. | .. | .. | .. | .. | .. | Jan 2025 | US$ 5 299 | amazon.com | |
| 2. | OM System OM-1 | 5/5 | .. | .. | 87/100 | 5/5 | 4.5/5 | Feb 2022 | US$ 2 199 | ebay.com | |
| 3. | Canon R1 | .. | .. | .. | .. | .. | .. | Jul 2024 | US$ 6 299 | amazon.com | |
| 4. | Canon R3 | 5/5 | o | 4.5/5 | .. | 5/5 | 4.5/5 | Sep 2021 | US$ 5 999 | amazon.com | |
| 5. | Leica SL2 | 4/5 | .. | 4.5/5 | .. | 4.5/5 | 4/5 | Nov 2019 | US$ 5 999 | amazon.com | |
| 6. | Leica SL2-S | 4/5 | .. | 4/5 | .. | 4.5/5 | 4.5/5 | Dec 2020 | US$ 4 899 | amazon.com | |
| 7. | Leica SL3 | .. | .. | 4.5/5 | .. | .. | 4.5/5 | Mar 2024 | US$ 6 999 | amazon.com | |
| 8. | Nikon Z5 II | .. | .. | .. | .. | .. | .. | Apr 2025 | US$ 1 699 | amazon.com | |
| 9. | Olympus E-M1 II | 5/5 | + + | 5/5 | 85/100 | 4.5/5 | 4.5/5 | Sep 2016 | US$ 1 999 | ebay.com | |
| 10. | Olympus E-M1 III | 5/5 | .. | 5/5 | 83/100 | 4.5/5 | 4/5 | Feb 2020 | US$ 1 799 | ebay.com | |
| 11. | OM System OM-1 II | .. | .. | .. | .. | .. | .. | Jan 2024 | US$ 2 399 | amazon.com | |
| 12. | OM System OM-3 | .. | .. | .. | 86/100 | .. | .. | Feb 2025 | US$ 1 999 | amazon.com | |
| 13. | Panasonic GH5 | 4.5/5 | + + | .. | 85/100 | 4.5/5 | 5/5 | Jan 2017 | US$ 1 999 | ebay.com | |
| 14. | Panasonic S1 II | .. | .. | .. | .. | .. | .. | May 2025 | US$ 3 199 | amazon.com | |
| 15. | Panasonic S5 | 4.5/5 | + + | 4.5/5 | 88/100 | 4.5/5 | 4.5/5 | Sep 2020 | US$ 1 999 | amazon.com | |
| 16. | Panasonic S5 II | 4.5/5 | + + | 5/5 | 90/100 | 4.5/5 | 5/5 | Jan 2023 | US$ 1 999 | amazon.com | |
| 17. | Sony A9 III | 4.5/5 | .. | .. | 91/100 | .. | .. | Nov 2023 | US$ 5 999 | 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, please note that some of the review sites have changed their methodology and reporting over time.

Check Leica SL3-S price at
amazon.com

Check OM-1 offers at
ebay.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 1Ds Mark III vs OM System OM-1
- Canon R50 V vs Leica SL3-S
- Canon R7 vs Leica SL3-S
- Canon SX500 vs OM System OM-1
- Fujifilm GFX 100S II vs Leica SL3-S
- Leica SL3-S vs Panasonic S5 II
- Leica SL3-S vs Sony A7R V
- Leica SL3-S vs Sony RX1R III
- Nikon D800 vs OM System OM-1
- OM System OM-1 vs Panasonic ZS200
- OM System OM-1 vs Sigma fp
- Olympus E-M10 vs OM System OM-1
Specifications: Leica SL3-S vs OM System OM-1
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 | Leica SL3-S | OM System OM-1 |
|---|---|---|
| Camera Type | Mirrorless system camera | Mirrorless system camera |
| Camera Lens | Leica L mount lenses | Micro Four Thirds lenses |
| Launch Date | January 2025 | February 2022 |
| Launch Price | USD 5,299 | USD 2,199 |
| Sensor Specs | Leica SL3-S | OM System OM-1 |
| Sensor Technology | CMOS | Stacked BSI-CMOS |
| Sensor Format | Full Frame Sensor | Four Thirds Sensor |
| Sensor Size | 36.0 x 24.0 mm | 17.3 x 13.0 mm |
| Sensor Area | 864 mm2 | 224.9 mm2 |
| Sensor Diagonal | 43.3 mm | 21.6 mm |
| Crop Factor | 1.0x | 2.0x |
| Sensor Resolution | 24 Megapixels | 20.2 Megapixels |
| Image Resolution | 6000 x 4000 pixels | 5184 x 3888 pixels |
| Pixel Pitch | 6.00 μm | 3.34 μm |
| Pixel Density | 2.78 MP/cm2 | 8.96 MP/cm2 |
| Moiré control | no AA filter | no AA filter |
| Movie Capability | 6K/30p Video | 4K/60p Video |
| ISO Setting | 100 - 50,000 ISO | 80 - 25,600 ISO |
| ISO Boost | 50 - 100,000 ISO | 80 - 102,400 ISO |
| Image Processor | Maestro IV | TruePic X |
| Screen Specs | Leica SL3-S | OM System OM-1 |
| Viewfinder Type | Electronic viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 100% | 100% |
| Viewfinder Magnification | 0.76x | 0.82x |
| Viewfinder Resolution | 5760k dots | 5760k dots |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.2inch | 3.0inch |
| LCD Resolution | 2333k dots | 1640k dots |
| LCD Attachment | Tilting screen | Swivel screen |
| Touch Input | Touchscreen | Touchscreen |
| Shooting Specs | Leica SL3-S | OM System OM-1 |
| 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 | 30 shutter flaps/s | 10 shutter flaps/s |
| Shutter Life Expectancy | 400 000 actuations | 400 000 actuations |
| Electronic Shutter | up to 1/16000s | up to 1/32000s |
| Time-Lapse Photography | Intervalometer built-in | Intervalometer built-in |
| Image Stabilization | In-body stabilization | In-body stabilization |
| Fill Flash | no On-Board Flash | no On-Board Flash |
| Storage Medium | CFexB or SDXC cards | SDXC cards |
| Single or Dual Card Slots | Dual card slots | Dual card slots |
| UHS card support | UHS-II | Dual UHS-II |
| Connectivity Specs | Leica SL3-S | OM System OM-1 |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | no PC Sync | PC Sync socket |
| USB Connector | USB 3.2 | USB 3.0 |
| HDMI Port | full 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 |
| Bluetooth Support | Bluetooth built-in | Bluetooth built-in |
| Body Specs | Leica SL3-S | OM System OM-1 |
| Environmental Sealing | Weathersealed body | Weathersealed body |
| Battery Type | Leica BP-SCL6 | OM System BLX-1 |
| Battery Life (CIPA) | 315 shots per charge | 520 shots per charge |
| In-Camera Charging | USB charging | USB charging |
| Body Dimensions |
141 x 108 x 85 mm (5.6 x 4.3 x 3.3 in) |
135 x 92 x 73 mm (5.3 x 3.6 x 2.9 in) |
| Camera Weight | 852 g (30.1 oz) | 599 g (21.1 oz) |

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