OM-1 Mark II

Released February 2024

A 20.4-megapixel Micro Four Thirds mirrorless camera with a stacked sensor, subject-recognition autofocus, enlarged burst buffer and graduated ND simulation.

Type: Mirrorless
Sensor: Four Thirds
Megapixels: 20.4
Lens: Micro Four Thirds
Video: 4096 × 2160 at 60 fps
Body weight: 511 g

What reviewers say

Both praise the handling, effective stabilisation, wildlife autofocus and useful computational modes. Amateur Photographer finds pleasing colours and reliable moving-subject tracking, but regards it as an incremental OM-1 upgrade and wants better video controls. Tom's Guide particularly likes its grip and field autofocus, while finding high-ISO detail loss and modest native resolution limit cropping. Their high-ISO assessments differ; both note that subject type must be selected manually.

From amateurphotographer.com and tomsguide.com

Specifications

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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 rounds resolution to 20.4 effective and 22.9 total megapixels; stacked BSI Live MOS. Ordinary single-shot output 5184×3888, separate from composite high-resolution modes
Image formats: JPEG and ORF RAW; tripod 80 MP and handheld 50 MP high-resolution composites offer 12-bit or 14-bit RAW, with movement restrictions
ISO detail: Headline range includes expanded LOW approximately ISO 80. Maker Japan specifies LOW 80/100 and ISO 200–102400; default Auto upper limit 25600. Amateur Photographer describes 200–25600 as native and higher settings as expanded
Image processor: TruePic X

Lens and shooting

Lens mount: Micro Four Thirds
Stabilisation: Lens and sensor shift
Maximum continuous burst: 120 fps
Autofocus: Hybrid phase/contrast, 1053 cross-type phase positions; human, bird, dog/cat, vehicle, aircraft and train recognition. UK sensitivity −8 EV with f/1.2 lens at approximately ISO 100; Japan −5.5 EV with f/2.8 uses different conditions
Shutter: Mechanical 1/8000–60 seconds, electronic 1/32000–60 seconds; manufacturer mechanical durability rating 400000 actuations
Burst detail: Electronic SH1 120 fps fixes focus/exposure; SH2 up to 50 fps tracking requires compatible lenses. Mechanical 10 fps. Maker Japan example buffer 213 RAW/219 JPEG at 120 fps and 256/309 at 50 fps, with specified KIOXIA card and 12–40mm F2.8 PRO; UK older small-buffer rows conflict with its own 213-frame headline
Stabilisation detail: Five-axis sensor shift; UK CIPA claim up to 8.5 stops with 12–40mm F2.8 PRO II at 40mm. Compatible Sync IS up to 8.5 with 150–400mm F4.5 TC1.25x IS PRO at 150mm, half-press IS off and high frame rate
Exposure controls: Live ND2–128 and graduated ND2/4/8; Live Composite, focus stacking and pixel-shift modes. Live ND and GND cannot be combined (both reviews); mode, shutter and ISO restrictions apply

Video

Highest video resolution: 4096 × 2160 at 60 fps
Video detail: Internal C4K 4096×2160 and UHD up to 60p; H.264 8-bit or HEVC 10-bit modes with OM-Log400 and HLG. FHD high-speed 240 fps is separate. External RAW HDMI needs a compatible recorder, rather than being internal RAW recording
Audio: Internal stereo microphones, 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; headphone and lower-port cables can restrict rotation (Amateur Photographer)
Viewfinder detail: OLED approximately 5.76 million dots, approximately 100% coverage; maximum 1.65× with 50mm lens at infinity at −1 dioptre, depending on finder style. Launch press 0.83× is full-frame-equivalent magnification

Connections and design

Wi-Fi: Yes
Bluetooth: Yes
Battery life (maker's claim): 500 photographs
Body weight: 511 g
Release detail: Maker US launch release confirms late February 2024 sale; earliest worldwide day unconfirmed, so month precision retained. Its June 2025 PDF upload path is not the release date
Recording media: Two SD/SDHC/SDXC slots, UHS-I and UHS-II; no CFexpress support
Ports: USB 3.0 SuperSpeed Type-C, micro-HDMI Type D, 2.5 mm remote, 3.5 mm microphone/headphone, hot shoe and flash sync socket (maker Japan)
Wireless connections: Wi-Fi a/b/g/n/ac and Bluetooth Low Energy 4.2; smartphone location tagging, not built-in GPS
Battery life detail: BLX-1; maker Japan approximately 500 standard or 1010 low-power CIPA shots with specified KIOXIA card, IS on and no flash. UK table gives 520/1100 and its overview 500, so Japanese explicit conditions are used. JEITA video approximately 90 minutes, or 150 without other operations
Charging: In-camera USB charging with power off; USB Power Delivery bus power supported, revision 3.0 version 1.0a
Dimensions: Approximately 134.8×91.6×72.7 mm excluding protrusions (maker Japan); UK table gives conflicting 138.8 mm width
Weight detail: Approximately 511 g body only or 599 g with battery/card and without eyecup (maker Japan); photographed kit lens excluded
Materials: Magnesium-alloy body, −10 to 40°C operation; IP53 with specified IP53 lens or IPX1 with IPX1 lens. Weather resistance is not an immersion rating
Colours: Black

Pros and cons

Pros

Full-resolution electronic shooting up to 120 fps with focus fixed
Live ND and graduated ND simulation
Qualified IP53 weather resistance and sensor stabilisation

Cons

No CFexpress card support
Subject-recognition type must be selected
No internal 4K 120p

Closest rivals

Model	Type	Sensor	Megapixels	Lens	Video	Body weight	Released
PanasonicLUMIX GH7	Mirrorless	Four Thirds	25.2	Micro Four Thirds	5760 × 4320 at 29.97 fps	721 g	Jul 2024
PanasonicLUMIX G9II	Mirrorless	Four Thirds	25.21	Micro Four Thirds	5760 × 4320 at 29.97 fps	575 g	Nov 2023
PanasonicLUMIX G97	Mirrorless	Four Thirds	20.3	Micro Four Thirds	3840 × 2160 at 30 fps	478 g	Feb 2025

Sources

Photo: Maker front photograph with 12–40mm F2.8 PRO II kit lens; body specifications exclude lens

OM System OM-1 Mark II, rear view; 12–40mm F2.8 PRO II lens kit: Official maker product gallery photograph; 12–40mm F2.8 PRO II lens kit, body specifications exclude lens
OM System OM-1 Mark II, top view; 12–40mm F2.8 PRO II lens kit: Official maker product gallery photograph; 12–40mm F2.8 PRO II lens kit, body specifications exclude lens
OM System OM-1 Mark II, bottom view; 12–40mm F2.8 PRO II lens kit: Official maker product gallery photograph; 12–40mm F2.8 PRO II lens kit, body specifications exclude lens
OM System OM-1 Mark II, left side view; 12–40mm F2.8 PRO II lens kit: Official maker product gallery photograph; 12–40mm F2.8 PRO II lens kit, body specifications exclude lens
OM System OM-1 Mark II, right side view; 12–40mm F2.8 PRO II lens kit: Official maker product gallery photograph; 12–40mm F2.8 PRO II lens kit, body specifications exclude lens

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