OM-3

Released February 2025

A 20.4-megapixel Micro Four Thirds mirrorless camera with a stacked sensor, sensor stabilisation, colour-profile controls and computational photography modes.

Type: Mirrorless
Sensor: Four Thirds
Megapixels: 20.4
Lens: Micro Four Thirds
Video: 4096 × 2160 at 60 fps
Body weight: 413 g

What reviewers say

Both praise the metal construction, creative colour controls and convenient computational modes, while finding it better suited to smaller lenses than long telephotos. Amateur Photographer reports effective subject tracking, strong battery life and excellent stabilisation, but notes limited direct controls and high-ISO detail loss. Photography Blog finds the front colour dial obstructs its reviewer's grip and considers it expensive; Amateur Photographer is more enthusiastic about its compact system and shooting experience.

From photographyblog.com and amateurphotographer.com

Specifications

Report a wrong or missing spec

Image and sensor

Camera type: Mirrorless
Sensor format: Four Thirds
Sensor type: Stacked BSI Live MOS
Sensor dimensions: 17.3 × 13 mm
Effective resolution: 20.4 MP
Largest image: 5184 × 3888
RAW recording: Yes
Standard ISO range: 80–102400
Sensor detail: UK specification rounds effective resolution to 20.4 MP and total to 22.9 MP; maker US press release specifies 20.37 effective and 22.93 total. 5184×3888 single-shot output, separate from 80 MP tripod or 50 MP handheld pixel-shift composites
Image formats: ORF RAW and JPEG; high-resolution modes combine eight exposures and can save composite RAW; moving subjects and capture conditions affect results
ISO detail: Maker UK published sensitivity range includes LOW, approximately ISO 80, through ISO 102400; default Auto upper limit ISO 25600. This headline range includes expanded settings, rather than implying ISO 80 is the native base sensitivity
Image processor: TruePic X

Lens and shooting

Lens mount: Micro Four Thirds
Stabilisation: Lens and sensor shift
Maximum continuous burst: 120 fps
Lens detail: Native Micro Four Thirds mount; Sync IS and fastest continuous tracking depend on compatible lenses; kit lens is excluded from body specifications
Autofocus: 1053 cross-type sensor phase-detection and contrast positions; AI recognition for humans, birds, cats/dogs, motorsports, aircraft and trains; EV −8 to 19 at approximately ISO 100 with an f/1.2 lens. Subject type is selected manually (Amateur Photographer)
Shutter: Mechanical focal-plane 1/8000–60 seconds and Bulb up to 30 minutes; electronic high-speed modes have additional restrictions
Burst detail: Electronic SH1 up to 120 fps with focus/exposure fixed; SH2 up to 50 fps tracking with specified compatible lenses, no slow shutter or flash. Maker example buffer at 120 fps is 88 RAW/90 large fine JPEG, versus 102/125 at 50 fps and 151/375 at 20 fps, with specified KIOXIA card and 12–40mm F2.8 PRO II. Mechanical approximately 6 fps
Stabilisation detail: Five-axis sensor shift, CIPA 2024 up to 6.5 centre/5.5 corner stops with 12–45mm F4 PRO at 45mm; compatible Sync IS up to 7.5/6.5 with 12–100mm F4 IS PRO at 100mm and half-press stabilisation off
Flash: External hot-shoe flash support. Maker interface table lists a sync socket, while the read review's port discussion does not; no assumed connector shape
Exposure controls: PASM, five saved custom modes, front colour/monochrome profile dial and CP button. Live ND to ND64; Live GND to GND8. Restrictions on mode, flash, ISO and shutter apply

Video

Highest video resolution: 4096 × 2160 at 60 fps
Video detail: Internal C4K 4096×2160 or UHD 3840×2160 up to 60p; H.264 and HEVC MOV formats, OM-Log400, HLG and OM-Cinema profiles. FHD high-speed 240 fps is separate from 4K. External 12-bit RAW HDMI needs a recorder and disables internal recording. Maker thermal claim of 30 minutes at 40°C or no thermal time limit at 25°C applies specifically to 4K30 10-bit testing, not every mode
Audio: Maker MOV settings include 48 kHz/16-bit and 96 kHz/24-bit; external 3.5 mm microphone and headphone connections

Screen and viewfinder

Viewfinder: Electronic
Screen size: 3″
Screen dots: 1,620,000
Touchscreen: Yes
Tilting screen: Yes
Display detail: Fully articulated three-inch touchscreen, approximately 1.62 million dots; connected port cables can restrict rotation (Amateur Photographer)
Viewfinder detail: OLED approximately 2.36 million dots, 100% coverage, maximum 1.37× with 50mm lens at infinity and −1 dioptre depending on finder style; review figures near 0.68× are full-frame-equivalent magnification

Connections and design

Wi-Fi: Yes
Bluetooth: Yes
Battery life (maker's claim): 590 photographs
Body weight: 413 g
Release detail: Maker US press release confirms late February 2025 availability; earliest UK/worldwide retail day unconfirmed, so month precision retained. Press PDF's June upload path is not the release date
Recording media: One SD/SDHC/SDXC slot with UHS-I and UHS-II support
Ports: USB 3 Type-C, Type D micro-HDMI, 3.5 mm microphone and headphone connections; maker launch release explicitly says wired remote operation is unsupported
Wireless connections: Wi-Fi and Bluetooth Low Energy 5.2; optional RM-WR2 remote support; GPS tagging uses smartphone location, not an inferred built-in receiver
Battery life detail: BLX-1; approximately 590 standard-mode shots or 1040 Quick Sleep shots with specified KIOXIA UHS-II card. Maker video figures 120 minutes CIPA or 190 with zoom and other operations disabled
Charging: In-camera USB charging and USB Power Delivery bus power; charger not included, optional BCX-1 dual charger and F-5AC/F-7AC adapters
Dimensions: Approximately 139.3 × 88.9 × 45.8 mm, excluding protrusions
Weight detail: Approximately 413 g body only or 496 g including battery and memory card; photographed 12–45mm kit lens excluded
Materials: Magnesium alloy, −10 to 40°C operation; IP53 or IPX1 performance depends on attached lens. Maker weather qualification excludes charging and HDMI connection, and is not an immersion rating
Colours: Silver-and-black body

Pros and cons

Pros

Full-resolution electronic shooting up to 120 fps with focus fixed
Live ND and graduated ND simulation plus pixel-shift composites
Magnesium-alloy body with qualified IP53 weather resistance

Cons

One SD card slot
No front handgrip or autofocus joystick
Lower-resolution viewfinder than several similarly priced rivals

Closest rivals

Model	Type	Sensor	Megapixels	Lens	Video	Body weight	Released
PanasonicLUMIX G97	Mirrorless	Four Thirds	20.3	Micro Four Thirds	3840 × 2160 at 30 fps	478 g	Feb 2025
OM SYSTEMOM-5 Mark II	Mirrorless	Four Thirds	20.4	Micro Four Thirds	4096 × 2160 at 24 fps	370 g	Jul 2025
PanasonicLUMIX GH7	Mirrorless	Four Thirds	25.2	Micro Four Thirds	5760 × 4320 at 29.97 fps	721 g	Jul 2024

Sources

Photo: Maker front photograph with the 12–45mm F4 PRO kit lens; specifications and weights are for the body

OM System OM-3, front body view: Official maker product gallery photograph; body without lens
OM System OM-3, rear view: Official maker product gallery photograph; body without lens; exterior body view published by the maker in both OM-3 and OM-3 ASTRO exact product galleries
OM System OM-3, top view: Official maker product gallery photograph; body without lens; exterior body view published by the maker in both OM-3 and OM-3 ASTRO exact product galleries
OM System OM-3, bottom view: Official maker product gallery photograph; body without lens; exterior body view published by the maker in both OM-3 and OM-3 ASTRO exact product galleries
OM System OM-3, side view showing handgrip: Official maker product gallery photograph; body without lens; exterior body view published by the maker in both OM-3 and OM-3 ASTRO exact product galleries
OM System OM-3, side view showing connection covers: Official maker product gallery photograph; body without lens; exterior body view published by the maker in both OM-3 and OM-3 ASTRO exact product galleries

Spot a mistake? Tell us