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OM System OM-3

The OM System OM-3 is a Four Thirds Stacked CMOS mirrorless camera — known for its 20MP Stacked CMOS Sensor and 6.5 EV In-Body Stabilization. Check GearFocus for current availability, with buyer protection on every purchase.

OM System OM-3

OM System OM-3

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Camera Overview — OM System OM-3

The OM System OM-3 is a Micro Four Thirds mirrorless camera built around a 20MP Four Thirds Stacked CMOS sensor, delivering a compact and capable package aimed at photographers who want serious performance in a travel-friendly form. Weighing just 496g and measuring 139 x 89 x 46mm, the OM-3 features a metal top and bottom plate with black leatherette trim, giving it a premium feel without a raised grip. The body carries an IP53 weather-sealing rating, making it suitable for use in light rain and dusty conditions.

In-body image stabilization is rated at 6.5 EV and can coordinate with select lenses for enhanced performance. The OM-3 records up to 4K UHD at 60fps with full-width readout, offers 10-bit H.265 recording in OM-Log400 and HLG color modes, and reaches up to 240fps in Full HD. Continuous shooting tops out at 120fps with AF/AE locked via electronic shutter and 50fps with continuous autofocus.

A single UHS-II SD card slot handles storage. The rear screen is a 3-inch, 1,620,000-dot fully articulated panel, and the EVF offers 2,360,000 dots at 0.69x magnification. A creative dial with five positions, computational photography modes including Live ND, handheld high-resolution shooting up to 50MP, and subject recognition AF covering humans, birds, and vehicles round out a well-stocked feature set at a $1,999 body-only price.

Key Features — OM System OM-3

20MP Stacked CMOS Sensor: The Four Thirds BSI Stacked CMOS sensor — shared with the OM-1 Mark II — enables fast readout speeds that support high continuous shooting rates and reduced rolling shutter distortion.

6.5 EV In-Body Stabilization: The IBIS system is rated at 6.5 EV of compensation and can coordinate with select lenses, making handheld shooting at slow shutter speeds more reliable.

80MP High-Resolution Mode: A multi-shot composite mode delivers up to 80MP on a tripod or 50MP handheld, extracting far more detail than the native sensor resolution for landscape and studio work.

4K 60fps Full-Width Video: The camera reads out the full sensor width at up to 4K 60fps with no crop, and records 10-bit H.265 footage in OM-Log400 or HLG for flexible color grading.

120fps Continuous Shooting: The electronic shutter reaches 120fps with AF/AE locked and 50fps with continuous autofocus active, making it capable of capturing fast-moving subjects with minimal gaps.

IP53 Weather Sealing: The metal-clad body is rated IP53, providing protection against dust ingress and light rain for outdoor and travel shooting in variable conditions.

Camera Specifications — OM System OM-3

OM System OM-3 full specifications
SpecDetail
SensorFour Thirds Stacked CMOS
ViewfinderEVF

Description — OM System OM-3

The OM System OM-3 is a Micro Four Thirds mirrorless camera built around a 20MP Four Thirds Stacked CMOS sensor housed in a compact 139 x 89 x 46mm, 496g body with a metal top and bottom plate and black leatherette finish. Weather protection is provided by an IP53 rating, and in-body image stabilization is rated at 6.5 EV, with lens coordination available for compatible optics. The camera shoots continuously at up to 120fps with AF/AE locked or 50fps with continuous autofocus (select lenses required), and a Pro Capture mode is available for pre-burst capture.

On the video side, the OM-3 records 4K UHD at up to 60fps full-width, with 10-bit H.265 encoding in OM-Log400 and HLG color modes, plus Full HD up to 240fps. The rear features a 3-inch, 1,620,000-dot fully articulated touchscreen, while the EVF delivers 2,360,000 dots at 0.69x magnification. A UHS-II SD single card slot handles storage.

The creative dial offers 5 positions including Color, Mono, Art modes, Color Creator, and Standard, with extensive color profile controls including per-hue saturation across a 12-hue color wheel. Body-only MSRP is $1,999, with a kit option including the M.Zuiko ED 12-45mm F4.0 Pro lens available at $2,299.

Pros — OM System OM-3

  • ✓20MP Four Thirds Stacked CMOS sensor with handheld high-resolution mode producing 50MP composites and tripod mode reaching 80MP
  • ✓6.5 EV in-body image stabilization (IBIS) with lens coordination support
  • ✓4K UHD up to 60fps with full-width readout and 10-bit H.265 recording in OM-Log400 and HLG

Cons — OM System OM-3

  • ✗Single card slot (UHS-II SD only) — no backup recording option for critical shoots
  • ✗No joystick for AF point control; relies on touchscreen and four-way controller
  • ✗50fps C-AF requires select lenses; many lenses are limited to 25fps in continuous autofocus mode

Videos — OM System OM-3

This MIGHT Be As Close to a New Pen F as We're Gonna Get — PetaPixel

Frequently Asked Questions — OM System OM-3

What sensor does the OM-3 use and what resolution does it offer?+
The OM-3 uses a 20MP Four Thirds Stacked CMOS sensor with a sensor area of 225mm². In high-resolution composite mode, it can produce 50MP images handheld or 80MP images on a tripod.
What are the video capabilities of the OM-3?+
The OM-3 records 4K UHD at up to 60fps with full-width readout. It supports 10-bit recording via H.265 in OM-Log400 and HLG color modes, and Full HD up to 240fps. It also includes micro HDMI output, a headphone jack, and a microphone jack for external audio monitoring and input.
Is the OM-3 weather-sealed?+
Yes, the OM-3 carries an IP53 weather-sealing rating, providing protection against splashing water and dust ingress.
What autofocus subject recognition modes does the OM-3 support?+
The OM-3 supports subject recognition for humans/eyes, cars and motorcycles, airplanes/helicopters, trains, birds, and dogs/cats. It also includes a Star AF mode for astrophotography. Note that tracking and subject recognition cannot operate simultaneously.
What battery does the OM-3 use and what is its rated shot count?+
The OM-3 uses the BLX-1 battery (17Wh capacity), which is the same battery used in the OM-1 Mk II. CIPA-rated shot count via LCD is 590 shots per charge.
What computational photography features does the OM-3 include?+
The OM-3 offers a dedicated CP button that accesses modes including High Resolution (tripod and handheld), Live ND (1–6 EV), Live Graduated ND (1–3 EV), Focus Stacking (requires select lenses), HDR, and Multiple Exposure.

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