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OM SYSTEM OM-1 Mark II vs Panasonic LUMIX G9II

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

OM SYSTEMOM-1 Mark IIPanasonicLUMIX G9II
Overview
ReleasedFebruary 2024November 2023
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFour ThirdsFour Thirds
Sensor typeStacked BSI Live MOSLive MOS
Sensor dimensions17.3 × 13 mm17.3 × 13 mm
Effective resolution20.4 MP25.21 MP
Largest image5184 × 38885776 × 4336
RAW recordingYesYes
Standard ISO range80–102400100–25600
Sensor detailUK 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 modesMaker Japan specifies 25.21 million effective and 26.52 million total pixels, marketed as 25.2 MP; 17.3 × 13 mm Live MOS. Native 4:3 stills 5776×4336; high-resolution composites 11552×8672 are separate from native resolution
Image formatsJPEG and ORF RAW; tripod 80 MP and handheld 50 MP high-resolution composites offer 12-bit or 14-bit RAW, with movement restrictionsJPEG and RAW; Fine/Standard JPEG and RAW+JPEG options
ISO detailHeadline 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 expandedStandard stills ISO 100–25600; expanded ISO 50; video and V-Log have different ranges. Maker Japan states no Dual Native ISO
Image processorTruePic X–
Lens and shooting
Lens mountMicro Four ThirdsMicro Four Thirds
StabilisationLens and sensor shiftLens and sensor shift
Maximum continuous burst120 fps75 fps
AutofocusHybrid 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 conditionsPhase Hybrid AF; current Japan table recognises humans, animals, cars, motorcycles, trains and aircraft. The last two extend the launch-era review descriptions and are not assumed launch features
ShutterMechanical 1/8000–60 seconds, electronic 1/32000–60 seconds; manufacturer mechanical durability rating 400000 actuationsMechanical 60–1/8000 second and Bulb to approximately 30 minutes; electronic first curtain 60–1/2000; electronic 60–1/32000 with Bulb to approximately 60 seconds
Burst detailElectronic 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 headlineFull-resolution electronic 75 fps AFS/MF with focus fixed; 60 or 20 fps AFS/AFC/MF. SH RAW/JPEG buffer 200 frames; mechanical 14 fps AFS/MF or 10 fps AFC, electronic first curtain 14/9 respectively. Normal RAW buffer at least 170 frames under maker conditions; pre-burst available, with heat-related restrictions
Stabilisation detailFive-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 rateMaker UK eight-stop B.I.S. with H-ES12060 at 60 mm, and 7.5-stop Dual I.S.2 with H-FSA14140 at 140 mm, under CIPA yaw/pitch conditions; electronic video stabilisation is separate
Flash–No built-in flash; external flash support and sync up to 1/250 second
Exposure controlsLive 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 resolution4096 × 2160 at 60 fps5760 × 4320 at 29.97 fps
Video detailInternal 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 recordingInternal 5760×4320 4:3 open-gate HEVC 4:2:0 10-bit up to 29.97p; 5728×3024 17:9 up to 59.94p; C4K up to 119.88p and Full HD up to 239.76p. ProRes 422/HQ supported through USB SSD with recording-mode/media restrictions; no ProRes RAW inferred from GH7. Maker V-Log claim 13+ stops, dropping to 12+ above 60 fps; Dynamic Range Boost excludes SH bursts and specified slow-shutter combinations. No built-in cooling fan (Amateur Photographer)
AudioInternal stereo microphones, external 3.5 mm microphone and headphone connectionsStereo built-in microphone; high-resolution audio through compatible DMW-XLR1/DMW-XLR2; exact channel and format restrictions depend on recording mode
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3″
Screen dots1,620,0001,840,000
TouchscreenYesYes
Tilting screenYesYes
Display detailFully articulated three-inch touchscreen; headphone and lower-port cables can restrict rotation (Amateur Photographer)Three-inch 3:2 capacitive touchscreen, approximately 1.84 million dots; free-angle articulation (Panasonic UK), distinct from GH7's additional tilt frame
Viewfinder detailOLED 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 magnification0.5-inch OLED, approximately 3.68 million dots, 100% coverage; approximately 1.6× magnification, 0.8× in 35 mm terms under maker's 50 mm-equivalent/infinity/−1 dioptre/4:3 conditions
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)500 photographs370 photographs
Body weight511 g575 g
Release detailMaker 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 dateMaker UK confirms November 2023 availability; September 2023 is the announcement, not substituted for first sale
Recording mediaTwo SD/SDHC/SDXC slots, UHS-I and UHS-II; no CFexpress supportTwo SD/SDHC/SDXC UHS-II slots including V90; dual-slot recording options; supported video can record to USB SSD
PortsUSB 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)USB-C 10 Gbps; full-size HDMI, 3.5 mm microphone/headphone and 2.5 mm remote sockets (Amateur Photographer)
Wireless connectionsWi-Fi a/b/g/n/ac and Bluetooth Low Energy 4.2; smartphone location tagging, not built-in GPSWi-Fi 2.4 GHz 802.11b/g/n and 5 GHz 802.11a/n/ac; Bluetooth Low Energy 5.0; Japan channel ranges not assumed identical globally
Battery life detailBLX-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 operationsDMW-BLK22; current Japan CIPA 370 LCD/EVF shots with H-ES12060 and SD, or approximately 1300 in specified one-second power-save EVF mode. USB SSD approximately 310 shots. Older review claims of 390 shots are not substituted for the current maker table
ChargingIn-camera USB charging with power off; USB Power Delivery bus power supported, revision 3.0 version 1.0aUSB in-camera charging; Japan table approximately 220 minutes with bundled USB AC adapter or 170 minutes with DMW-BTC15 adapter; optional DMW-BTC15 charger approximately 175 minutes
DimensionsApproximately 134.8×91.6×72.7 mm excluding protrusions (maker Japan); UK table gives conflicting 138.8 mm widthApproximately 134.3 × 102.3 × 90.1 mm, excluding protrusions
Weight detailApproximately 511 g body only or 599 g with battery/card and without eyecup (maker Japan); photographed kit lens excludedMaker UK 575 g body only, 658 g with battery and SD card; lens excluded
MaterialsMagnesium-alloy body, −10 to 40°C operation; IP53 with specified IP53 lens or IPX1 with IPX1 lens. Weather resistance is not an immersion ratingDust/splash-resistant body (Panasonic UK); no waterproof rating inferred
In the box–Japan maker lists body cap, hot-shoe cover, battery-grip connector cover, shoulder strap, battery, USB AC adapter and USB A–C cable; regional contents may vary
ColoursBlack–

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