OM System OM-3

Name: OM System OM-3
Brand: OM System
SKU: 6721

Manufacturer: OM System

The OM System OM-3 is a mirrorless camera built around the Micro Four Thirds format, offering a compact and weather-sealed body that operates in temperatures as low as -10 °C. It features a 3″ articulating touchscreen, a 100% coverage electronic viewfinder, and weighs 496 g, keeping the overall package manageable for everyday use. The camera supports the full Micro Four Thirds lens ecosystem and connects via USB Type-C, Wi-Fi 5, and Bluetooth 5.2 for flexible file transfer and remote control.

At the core of the OM-3 sits a 20.4 MP back-illuminated stacked CMOS sensor paired with a TruePic X processor, delivering a native ISO range up to 25600 and an expanded ceiling of 102400. The in-body image stabilization is rated at 6.5 stops (CIPA) and can be combined with compatible lens stabilization for additional steadiness. Autofocus relies on 1053 phase-detection points with subject tracking, while continuous mechanical shooting reaches 6 fps. On the video side, the camera records at 2160p/60fps with a bitrate of up to 205 Mbps, supports slow-motion capture, and includes both a 3.5 mm microphone input and headphone jack alongside a built-in stereo microphone.

Pros

Weather-sealed body rated for operation down to -10 °C makes it suitable for use in cold or damp conditions
In-body image stabilization rated at 6.5 stops (CIPA) and combinable with lens stabilization offers strong compensation for camera shake
Phase-detection autofocus with 1053 points, subject tracking, and touch AF provides versatile and responsive focusing options
4K/60p video recording at up to 205 Mbps with continuous phase-detection AF, a 3.5 mm mic input, and a headphone jack covers a wide range of video needs
The fully articulating 3-inch touchscreen with 1620k dots resolution allows for flexible framing from varied shooting angles
Lossless compressed raw support and pixel shift shot mode give additional control over image quality and file management

Cons

Only a single memory card slot, which offers no redundancy for backup during shooting
No built-in GPS for automatic location tagging of images
No NFC, which limits quick wireless pairing options
No built-in flash, requiring an external unit for situations where additional light is needed
First-party live streaming is not supported
The Micro Four Thirds sensor format results in a smaller sensor area compared to larger format systems, which may limit light gathering at the physical level

Who is this for?

The OM System OM-3 is well suited to photographers who regularly shoot in challenging outdoor conditions, thanks to its weather-sealed body rated down to -10 °C and a compact, lightweight form factor. The 6.5-stop in-body stabilization combined with 1053-point phase-detection autofocus and subject tracking makes it a strong option for wildlife, travel, and street photographers who need reliable sharpness in unpredictable situations. Videographers with moderate production needs will also find value here, given the 4K/60p recording, continuous autofocus, 205 Mbps bitrate, and a full set of audio connections including a 3.5 mm microphone input and headphone jack.

Who is this NOT for?

Users who require dual memory card slots for in-camera backup during professional assignments will find this camera lacking, as it offers only a single card slot. The Micro Four Thirds sensor, while capable, means the camera is less suited to photographers who prioritize maximum low-light performance or work extensively in very high-ISO conditions where a physically larger sensor would gather more light. Additionally, those who depend on built-in GPS for automatic geotagging or need NFC for quick wireless pairing will need to look elsewhere, as neither feature is available on this model.

Design:

Type	Mirrorless
viewfinder	Electronic viewfinder (EVF)
is weather-sealed (splashproof)	✓
screen resolution	1620k dots
Has a flip-out screen	✓
viewfinder coverage	100%
screen size	3"
weight	496 g
has a touch screen	✓
Has a hot shoe	✓
volume	567.176666 cm³
is a system camera	✓
has a flash	✕
lowest potential operating temperature	-10 °C
maximum operating temperature	40 °C
Has a tilting viewfinder	✕
width	139.3 mm
height	88.9 mm
thickness	45.8 mm

The OM System OM-3 is a mirrorless system camera with an electronic viewfinder offering 100% coverage, making it straightforward to frame shots accurately. The body measures 139.3 mm wide, 88.9 mm tall, and 45.8 mm thick, with a total volume of approximately 567.18 cm³ and a weight of 496 g. Its weather-sealed construction allows operation in temperatures ranging from -10 °C to 40 °C, providing resilience in varied conditions. The 3″ touchscreen resolves at 1620k dots and flips out fully for flexible shooting angles, though the viewfinder itself does not tilt. A hot shoe is present for attaching external flash units, while a built-in flash is not included. The camera does not have a tilting viewfinder.

Optics:

sensor size	Micro Four Thirds
lens mount	Micro Four Thirds
focus points	1053
megapixels (main camera)	20.4 MP
maximum ISO	25600 ISO
maximum expanded ISO	102400 ISO
has sensor shift stabilization	✓
continuous shooting (mechanical)	6 fps
has AF tracking	✓
Has phase-detection autofocus for photos	✓
fastest shutter speed	0.000125 s
has manual focus	✓
has touch autofocus	✓
has manual shutter speed	✓
has a built-in HDR mode	✓
has a BSI sensor	✓
has manual exposure	✓
has a two-stage shutter	✓
has a serial shot mode	✓
has a CMOS sensor	✓
has manual ISO	✓
flash sync speed	0.004 s
has manual white balance	✓
exposure time	60 s
Maximum electronic shutter speed	3.125E-5 s
has a stacked CMOS sensor	✓
image stabilization rating (CIPA)	6.5 stops
can combine image stabilization	✓

The OM System OM-3 uses a Micro Four Thirds back-illuminated stacked CMOS sensor resolving 20.4 MP, paired with a Micro Four Thirds lens mount for broad lens compatibility. In-body sensor-shift stabilization is rated at 6.5 stops (CIPA) and can be combined with compatible lens stabilization for additional steadiness. The autofocus system draws on 1053 phase-detection points and supports AF tracking, touch autofocus, and manual focus, giving shooters flexible control over how the camera locks onto a subject. Native ISO reaches 25600, expandable to 102400, with full manual control over ISO, exposure, shutter speed, and white balance also available. The mechanical shutter tops out at 1/8000 s, while the electronic shutter achieves a maximum of 1/32000 s, and flash sync is supported at 1/250 s. Continuous mechanical shooting runs at 6 fps in burst mode, and maximum exposure time extends to 60 s for long-exposure work. A two-stage shutter, built-in HDR mode, and manual exposure round out the imaging controls.

Videography:

video recording (main camera)	2160 x 60 fps
Has phase-detection autofocus for videos	✓
has continuous autofocus when recording movies	✓
has a microphone input	✓
has a socket for a 3.5 mm audio jack	✓
has a stereo microphone	✓
Has timelapse function	✓
movie bitrate	205 Mbps
number of microphones	2
has a 24p cinema mode	✓
supports slow-motion video recording	✓

The OM System OM-3 records video at up to 2160p/60fps with a bitrate of 205 Mbps, and also supports a 24p cinema mode as well as slow-motion video recording for more creative flexibility. Autofocus during video capture relies on phase-detection and remains continuous throughout recording, helping maintain subject sharpness without manual intervention. For audio, the camera includes a built-in stereo microphone with two capsules, a 3.5 mm microphone input for an external mic, and a 3.5 mm headphone jack for monitoring. Timelapse recording is also supported natively, rounding out a video feature set that covers a range of shooting scenarios.

Battery:

Battery life (CIPA)	590 shots
has a removable battery	✓
has a rechargeable battery	✓
has a battery level indicator	✓
battery power	2280 mAh

The OM System OM-3 is powered by a removable, rechargeable battery rated at 2280 mAh, with a CIPA-rated battery life of 590 shots per charge. A battery level indicator is built in, allowing users to monitor remaining power at a glance without any guesswork during a shoot.

Features:

processor	TruePic X
supports Wi-Fi	✓
Has Bluetooth	✓
Has dual card slots	✕
has pixel shift shot	✓
shoots raw	✓
supports lossless compressed raw	✓
Wi-Fi version	Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
supports a remote smartphone	✓
has an HDMI output	✓
has GPS	✕
has first-party support for live streaming	✕
has an advanced hot shoe	✕
has NFC	✕
has an external memory slot	✓
Has USB Type-C	✓
Bluetooth version	5.2

The OM System OM-3 runs on a TruePic X processor and supports both Wi-Fi 5 (802.11ac) and Wi-Fi 4 (802.11n) for wireless connectivity, alongside Bluetooth 5.2 for pairing with a smartphone for remote control. Connectivity options extend to a USB Type-C port and an HDMI output, while an external memory slot provides storage flexibility, though the camera has only a single card slot rather than dual slots. Raw capture is supported, including lossless compressed raw, and a pixel shift shot mode is available for enhanced resolution output. The camera does not include GPS, NFC, an advanced hot shoe, or first-party live streaming support.

Final Verdict

The OM System OM-3 is a well-rounded Micro Four Thirds mirrorless camera that makes a compelling case for photographers and videographers who value portability without sacrificing serious capability. Its 6.5-stop in-body image stabilization combined with 1053-point phase-detection autofocus forms the backbone of a system that handles a wide range of demanding shooting scenarios, from wildlife in cold weather to 4K/60p video production with full audio monitoring. While the single card slot and absence of GPS or NFC place some practical limits on its appeal for certain professional workflows, these trade-offs feel deliberate given the camera's compact, weather-sealed design and broad feature set. Overall, the OM-3 represents a thoughtfully specified camera that delivers meaningful technical depth for outdoor, travel, and enthusiast photographers who want a capable system in a manageable package.