Cameras · 2025 · OM SYSTEM

OM SYSTEM OM-3

Name: OM SYSTEM OM-3
Brand: OM SYSTEM

OM-3 is a mirrorless camera with a Micro Four Thirds mount and interchangeable lenses. Its metal body, inspired by old film SLRs, weighs 413 g. The stacked sensor and in-body stabilization stand out. It has one SD slot and no pronounced grip on the front.

OM-3 · body only

OM SYSTEM OM-3 — The silver body from OM SYSTEM’s OM-3 page, front view with an M.Zuiko zoom lens. — The silver body from OM SYSTEM’s OM-3 page, front view with an M.Zuiko zoom lens.

Specifications

Specification	Value
Announcement / availability	6 February 2025 / late February 2025 Dates from the manufacturer’s North America press release.
Sensor	4/3-inch stacked BSI Live MOS; approx. 20.4 MP effective, 22.9 MP total
Processor	TruePic X
Mount / format	Micro Four Thirds; 35 mm equivalent focal length approx. 2×
Photo size and format	5184 × 3888 maximum; 12-bit RAW and JPEG
ISO	LOW (approx. 80) – 102400; default auto upper limit 25600
Stabilization	Five-axis sensor shift
Stabilization rating	6.5 stops at centre and 5.5 at the corner in the body; 7.5 and 6.5 stops with a compatible Sync IS lens CIPA 2024. Body figure with 12–45 mm f/4 PRO at 45 mm; Sync IS figure with 12–100 mm f/4 IS PRO at 100 mm, half-press IS off. Not a guarantee for every shot.
Autofocus	1053-point cross-type on-chip phase detection; subject detection: people, birds, cats, dogs, car and motorcycle racing, aircraft, helicopters, trains
Viewfinder	2.36-million-dot OLED electronic viewfinder; up to 1.37× magnification; 27 mm eye point Magnification with a 50 mm lens at infinity, −1 dioptre; depends on the selected viewfinder style.
Rear display	3-inch, 3:2; approx. 1.62 million dots; touch, vari-angle
Shutter	Focal plane; 1/8000–60 s; down to 1/32000 s in silent mode; approx. 100,000 shot durability
Burst	Approx. 6 fps; with Pro Capture 20 fps, 50 fps with compatible lenses and 120 fps with focus and exposure fixed at the first frame Slow shutter speeds and flash cannot be used. The compatible-lens list for 50 fps is limited.
Pro Capture	Pro Capture: starts capturing at half-press; a full press saves up to 70 frames from before it Not available while connected to a smartphone over Wi-Fi.
Computational modes	High Res Shot (10368 × 7776 on a tripod, 8160 × 6120 handheld); Live ND (ND2–ND64) and Live GND; HDR; focus stacking; multiple exposure; CP button
Colour control	Creative dial on the front: COLOR, MONO, ART, CRT; Color and Monochrome Profile Control
Video resolution	4K 3840 × 2160 and C4K 4096 × 2160: 60/50/30/25/24p; Full HD 60/50/30/25/24p
Video codec	H.264 8-bit and H.265 10-bit; Flat, OM-Log400, HLG, OM-Cinema1 and OM-Cinema2 profiles With H.265 selected, only OM-Log400 and HLG are available.
High-speed video	Full HD at 240, 120 and 100 fps; no sound recorded; slow and quick motion mode Available rates depend on codec and frame rate.
Continuous video recording	At 4K 30p 10-bit: up to 30 minutes at 40 °C; unlimited at 25 °C Manufacturer’s own test condition.
External recording	HDMI Type D; 4K/C4K 12-bit RAW output to a compatible recorder In RAW output the camera does not record to the card.
Audio	Built-in stereo microphones; 3.5 mm microphone and headphone jacks; 96 kHz / 24-bit linear PCM
Card slot	One SD slot; SDHC/SDXC, UHS-I and UHS-II 4K/C4K, ALL-Intra and 100 fps or faster recording require a UHS speed class 3 card or better.
Ports and wireless	USB-C (USB 3); HDMI Type D; microphone and headphone; hot shoe; sync socket; Bluetooth Low Energy and Wi-Fi Wired remote control is not supported.
Battery	BLX-1 lithium-ion battery; 7.2 V / 2280 mAh; approx. 500 charge cycles
Battery life	Approx. 590 shots in standard mode, approx. 1040 in quick sleep mode; 120 min video (CIPA) Approximate values measured with a KIOXIA 64 GB UHS-II card.
USB charging and power	The battery charges in the camera over USB-C; USB PD can power the camera externally Powering needs a USB PD source rated at 27 W or more (9 V 3 A, 15 V 2 A or 15 V 3 A).
Dimensions	139.3 × 88.9 × 45.8 mm (excluding protrusions)
Weight	413 g body only; 496 g with battery and card
Durability	Magnesium alloy body; IP53 splash and dust resistance; freezeproof to −10 °C IP53 needs a compatible splash- and dust-proof lens; not applicable while charging or with HDMI connected.
Dust reduction	Supersonic Wave Filter
Software	OM Image Share (OI.Share) app; OM Workspace RAW processing software

From the manufacturer

OM SYSTEM describes the OM-3 as a camera that brings the OM-1 Mark II’s stacked sensor and focus system into a smaller, film-SLR-inspired body, with computational photography modes and OM-Cinema video profiles. OM Digital Solutions

Strengths and limitations

The Cotswold Photographer’s Fleet, after several months, singles out continuous-AF tracking and stabilization; he finds the viewfinder the weakest of his cameras, notes the single card slot and adds an L-grip for the 25 mm f/1.2 because there is no front grip.
Owner-author David Fleet; with 17 mm f/1.8, 12–40 mm f/2.8 and 25 mm f/1.2 PRO; May 2026 update. The page carries affiliate links. Firmware version not stated.
The Cotswold Photographer: OM System OM-3 Review (long-term update)
Westlake reports sharp handheld frames at 2 seconds with the 12–45 mm f/4 PRO and usable frames at exposures up to 10 seconds with primes. He used a single battery and never wanted a spare, and says bursts approached a thousand frames per charge; he finds the physical controls sparse and the body without a real grip.
Andy Westlake’s Amateur Photographer test; with 12–45 mm f/4 PRO, 17 mm f/1.8, 12 mm f/2 and Panasonic Leica 25 mm f/1.4. One tester; firmware version not stated.
Amateur Photographer: OM System OM-3 review
Eisl lists the small number of buttons and the lack of a screw-in protective sleeve for the HDMI port as limits for video use, saying the HDMI port is more exposed than on the OM-1 series.
Single review text by Thomas Eisl; the limitations part of the video assessment. Not an owner account.
Thomas Eisl: OM System OM-3 Review
DPReview finds the autofocus good but not best in class: standard tracking follows subjects but sometimes misjudges lens drive distance, producing a few soft frames, and subject recognition cannot be combined with AF tracking. In video, rolling shutter was measured at 5.8 ms in the main 4K and FHD modes.
Single review and the lenses used; focus behaviour may vary by lens.
DPReview: OM System OM-3 review
DPReview finds the battery, rated at 590 shots by CIPA, impressive for the size, and lists IP53 protection and the computational modes behind the CP button (Live ND, high resolution, focus stacking) as positives. The small, low-resolution viewfinder, no AF joystick and 50 fps working only with certain lenses are listed as negatives.
Single review; the real-world shot count comment is the reviewer's general experience, not a measurement.
DPReview: OM System OM-3 review

Owner experiences and issues

Joel B. writes that water got into the camera while it was used with a professional lens and that the warranty did not cover it; he says not to rely on the IP53 rating.
One of 11 Adorama reviews (November 2025, 2 stars). Single report; the lens model, conditions and the warranty reasoning are unknown. The full review text could not be opened directly; a page digest was read.
Adorama: OM System OM-3 customer reviews
Patricia H. is happy with it for birding because it is light; she reports film-like grain in low-light RAW files, recommends a spare battery for a full day and says the viewfinder is hard to see through polarized sunglasses.
One of 11 Adorama reviews (June 2025, 5 stars). Single user; no verified-buyer or incentive label visible. The full text could not be opened directly; a page digest was read.
Adorama: OM System OM-3 customer reviews

OM SYSTEM OM-3

Specifications

From the manufacturer

Strengths and limitations

Owner experiences and issues

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