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OM SYSTEM OM-5 Mark II vs OM SYSTEM PEN

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

Better figure, where one is clearly better

OM SYSTEMOM-5 Mark IIOM SYSTEMPEN
Overview
ReleasedJuly 2025Coming late October 2026 (Japan and North America)
Image and sensor
Camera typeMirrorlessMirrorless
Sensor formatFour ThirdsFour Thirds
Sensor typeLive MOSLive MOS
Sensor dimensions17.4 × 13 mm17.4 × 13 mm
Effective resolution20.4 MP20.4 MP
Largest image5184 × 38885184 × 3888
RAW recordingYesYes
Standard ISO range200–25600200–25600
Sensor detailMaker Japan specifies approximately 20.37 effective and 21.77 total megapixels, rounded to 20.4 and 21.8 in UK table. Japan gives 17.4×13 mm image area; UK gives 17.3×13 mmApproximately 20.37 effective and 21.77 total megapixels; 17.4×13 mm in maker Japan table. Ordinary output 5184×3888; not a stacked sensor
Image formatsJPEG and 12-bit losslessly compressed ORF RAW; ordinary output 5184×3888. Tripod composite RAW 10368×7776 needs OM Workspace for 80 MP development; handheld composite 50 MP, rather than an 80 MP single-shot sensorJPEG and 12-bit losslessly compressed ORF RAW; handheld composite 50 MP, tripod composite up to 80 MP RAW developed with OM Workspace, not single-shot sensor resolution
ISO detailManual ISO 200–25600, expanded LOW approximately 64 and 100; default Auto upper limit 6400 (maker Japan)ISO 200–25600 with expanded LOW approximately 64 and 100; default Auto upper limit 6400
Image processorTruePic IXTruePic IX
Lens and shooting
Lens mountMicro Four ThirdsMicro Four Thirds
StabilisationLens and sensor shiftSensor shift
Maximum continuous burst30 fps30 fps
AutofocusHybrid sensor phase/contrast, 121 cross-type phase positions; face/eye recognition and Starry Sky AF, without animal/vehicle subject recognition (both reviews)Sensor phase/contrast detection with 121 cross-type phase positions; human, cat and dog recognition for stills, face/eye detection for video; Starry Sky AF
ShutterMechanical 1/8000–60 seconds; electronic 1/32000–60 seconds; Bulb and Live Composite modesMechanical 1/4000–60 seconds; electronic 1/32000–60 seconds; Bulb, Live Time and Live Composite modes
Burst detailElectronic 30 fps fixes focus/exposure at first frame; approximately 10 fps electronic tracking and 6 fps mechanical. Maker Japan example 30 fps buffer 19 RAW/21 JPEG with specified KIOXIA card and 12–40mm F2.8 PRO II; UK examples differElectronic high approximately 30 fps with fixed focus/exposure, low approximately 8 fps with tracking; mechanical approximately 5 fps. Maker examples at electronic 30 fps give 20 RAW/20 JPEG frames, tracking 8 fps 23 RAW/48 JPEG, with specified SanDisk card and 12–40mm F2.8 PRO II
Stabilisation detailFive-axis sensor shift; maker CIPA 2024 up to 6.5 centre/5.5 corner stops with 12–45mm F4 PRO at 45mm. Sync IS up to 7.5/6.5 with 12–100mm F4 IS PRO at 100mm and half-press IS offFive-axis sensor shift; CIPA 2024 up to 5.5 stops at centre and 4.5 at edges with 14–42mm F3.5–5.6 III at 42mm
Exposure controlsPASM and computational-photography CP button; Live ND2–16, focus stacking, HDR and multiple exposures; mode, ISO, shutter, flash and compatible-lens restrictions applyPASM, Live ND2–16, focus stacking, HDR and multiple exposure; restrictions depend on shooting mode and lens
Video
Highest video resolution4096 × 2160 at 24 fps4096 × 2160 at 24 fps
Video detailInternal C4K 4096×2160 at 24p; UHD 3840×2160 at 30/25/24p; H.264 MOV, 8-bit recording (Amateur Photographer). FHD high-speed 120 fps is separate; OM-Log400 and OM-Cinema1/2 profilesInternal H.264 MOV C4K 4096×2160 at 24p or UHD 3840×2160 at 30/25/24p; 8-bit recording (both reviews). OM-Log400 and OM-Cinema1/2 profiles; separate FHD S&Q up to 120 fps, with crop, no sound and no continuous AF (CameraLabs)
AudioInternal stereo microphones, external 3.5 mm microphone input; 48 kHz/16-bit or 96 kHz/24-bit recordingBuilt-in stereo microphones; external 3.5 mm microphone socket; 48 kHz/16-bit or 96 kHz/24-bit audio
Screen and viewfinder
ViewfinderElectronicElectronic
Screen size3″3″
Screen dots1,037,0001,040,000
TouchscreenYesYes
Tilting screenYesYes
Display detailFully articulated touchscreen; UK table 1.037 million dots, Japan rounds to 1.04 millionFully articulated 3-inch approximately 1.04-million-dot touchscreen; touchscreen menu operation
Viewfinder detailOLED approximately 2.36 million dots, approximately 100% coverage; maximum 1.37× with 50mm lens at infinity at −1 dioptre depends on finder styleOLED approximately 2.36 million dots and 100% coverage; 1.10–1.23× magnification with 50mm lens at infinity, depending on finder style
Connections and design
Wi-FiYesYes
BluetoothYesYes
Battery life (maker's claim)310 photographs410 photographs
Body weight370 g344 g
Release detailMaker US release confirms early July 2025 retail; Japan 18 July local date. Earliest worldwide day unconfirmed, so month precision retainedMaker announcement 9 September 2026; Japan and North America scheduled for late October 2026. UK product page has an active preorder state on 2 October; first UK sale date unconfirmed
Recording mediaOne SD/SDHC/SDXC slot, UHS-I and UHS-IIOne SD/SDHC/SDXC slot; UHS-I
PortsUSB 2.0 Hi-Speed Type-C without USB PD, micro-HDMI Type D, 3.5 mm microphone and 2.5 mm remote socket (maker Japan). UK USB 3 heading does not establish USB 3 transfer speedUSB 2.0 Hi-Speed Type-C, micro-HDMI Type D, 3.5 mm microphone socket and hot shoe; USB-C is not a USB 3 transfer-speed claim
Wireless connectionsWi-Fi b/g/n and Bluetooth Low Energy 5.2 (maker Japan); UK Bluetooth 4.2 table conflicts. Smartphone location tagging, rather than built-in GPSWi-Fi b/g/n and Bluetooth Low Energy 5.2; smartphone GPS tagging rather than built-in GPS
Battery life detailBLS-50; 310 standard or 640 low-power CIPA shots with specified KIOXIA card. Approximately 60 minutes CIPA video or 100 minutes with other operations disabled; recording limited by card, battery and conditionsBLS-7; approximately 410 CIPA shots using EVF or LCD; approximately 80 minutes CIPA video or 130 minutes with zoom and other operations disabled
ChargingIn-camera USB charging with power off; USB power supply supported, but no USB Power Delivery. Charger not suppliedIn-camera USB charging with camera off; no USB Power Delivery (maker Japan)
DimensionsApproximately 125.3×85.2×52 mm excluding protrusions (maker Japan and US launch); UK table gives conflicting 49.7 mm depthApproximately 125.8×74.5×43.3 mm excluding protrusions (maker Japan)
Weight detailMaker Japan 370 g body only or 418 g with battery/card and without eyecup; UK body-only table gives conflicting 366 g. Photographed kit lens excluded344 g body only or 393 g including battery and card (maker Japan); pictured kit lens excluded. CameraLabs pre-production dimensions and loaded weight differ
MaterialsIP53 with specified IP53 lens, IPX1 with IPX1 lens; weather qualification excludes charging and HDMI. Operation −10 to 40°C; not an immersion ratingDust-resistant and IPX1 splash resistance with an OM SYSTEM splashproof lens; not an immersion rating. Operating temperature 0–40°C
ColoursBlack, silver and sand beige; kit availability varies by regionBlack and silver

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