The OM SYSTEM OM-1 is a professional-grade Micro Four Thirds mirrorless camera designed to deliver exceptional speed, advanced imaging capabilities, and dependable performance in a compact, weather-resistant body. Featuring a 20.4-megapixel stacked BSI Live MOS sensor, TruePic X image processor, and sophisticated computational photography features, the OM-1 is well suited for wildlife, sports, landscapes, travel, and professional photography. Its combination of high-speed shooting, advanced autofocus, and robust construction makes it a versatile camera for demanding photographic environments.
At the heart of the OM-1 is a 20.4-megapixel stacked Back-Side Illuminated (BSI) Live MOS sensor designed to provide improved image quality, faster readout speeds, and enhanced low-light performance. Paired with the TruePic X image processor, the camera delivers efficient image processing, accurate color reproduction, and improved dynamic range. Its native ISO range of 200-25600, expandable to ISO 80-102400, provides flexibility when photographing under a variety of lighting conditions.
The OM-1 offers exceptional continuous shooting capabilities, supporting up to 10 frames per second with the mechanical shutter and up to 20 frames per second with the electronic shutter while maintaining continuous autofocus and autoexposure. For high-speed action photography, its blackout-free sequential shooting modes provide capture rates of up to 50 frames per second with continuous autofocus and up to 120 frames per second with fixed focus and exposure. The Pro Capture feature allows the camera to record images before the shutter button is fully pressed, helping photographers capture unpredictable moments.
Equipped with OM SYSTEM’s Cross Quad Pixel autofocus technology, the camera features 1,053 phase-detection autofocus points covering the entire imaging sensor. Its advanced autofocus system incorporates intelligent subject recognition capable of detecting and tracking vehicles, aircraft, trains, birds, dogs, cats, and human subjects. Face and eye detection further enhance focusing accuracy for portrait photography and other applications requiring precise subject tracking.
The OM-1 incorporates a sophisticated five-axis in-body image stabilization system capable of compensating for up to 7 stops of camera shake, or up to 8 stops when paired with compatible stabilized lenses. This technology allows photographers to capture sharper handheld images at slower shutter speeds and provides additional stability when working with telephoto lenses or photographing in challenging lighting conditions.
A comprehensive selection of computational photography features expands the camera’s creative capabilities. High Res Shot mode combines multiple exposures to produce detailed 50-megapixel handheld images or 80-megapixel images when using a tripod. Live ND provides simulated neutral density filtration up to ND64, allowing photographers to create long-exposure effects without additional filters. Live Composite and Focus Stacking further enhance the camera’s versatility for nighttime photography, landscapes, macro photography, and other specialized applications.
For video production, the OM-1 supports DCI and UHD 4K recording at up to 60 frames per second, along with high-speed Full HD recording at up to 240 frames per second. The camera also offers 10-bit recording capabilities, OM-Log and HLG picture profiles, and 12-bit RAW video output through its micro-HDMI connection when paired with a compatible external recorder. Dedicated microphone and headphone connections provide additional flexibility for professional audio monitoring and recording.
The camera features a high-resolution 5.76-million-dot OLED electronic viewfinder designed to provide a detailed and responsive viewing experience. Its 3.0-inch vari-angle touchscreen LCD offers flexible composition from high, low, and front-facing positions, making it convenient for both still photography and video recording. The articulating display also provides convenient access to camera settings, playback, and menu navigation.
Constructed with a durable magnesium-alloy body, the OM-1 features IP53-rated weather resistance when used with compatible weather-sealed lenses. Its dust-resistant, splash-resistant, and freezeproof design is engineered for use in challenging outdoor environments. The camera also incorporates a shutter mechanism rated for approximately 400,000 actuations, reflecting its professional-oriented construction.
Additional features include dual UHS-II SD memory card slots, USB-C charging and power delivery, built-in Wi-Fi and Bluetooth connectivity, and customizable controls for efficient operation. The camera uses the OM SYSTEM BLX-1 rechargeable battery and supports wireless image transfer and remote operation through compatible mobile devices.
The OM SYSTEM OM-1 combines advanced imaging technology, high-speed performance, sophisticated autofocus, and professional weather-resistant construction in a compact Micro Four Thirds camera body. Its extensive selection of photographic and video features makes it an excellent option for photographers seeking a versatile and capable mirrorless system for both everyday and demanding professional applications.
– Condition Note:
The camera exhibits moderate cosmetic wear consistent with previous use, including worn corners and edges throughout the exterior body, along with light scratches on the rear LCD screen. Additionally, there is a visible streak-like mark beneath the sensor surface that could not be removed through cleaning. This mark has been reported not to affect the camera’s functionality.

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