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OM SYSTEM PEN · Maker front photograph with 14–42mm III kit lens; body specifications exclude lens
OM SYSTEM · PEN
PEN
A 20.4-megapixel Micro Four Thirds mirrorless camera with a rangefinder-style body, electronic viewfinder, five-axis stabilisation and colour and monochrome profile controls.
- Type
- Mirrorless
- Sensor
- Four Thirds
- Megapixels
- 20.4
- Lens
- Micro Four Thirds
- Video
- 4096 × 2160 at 24 fps
- Body weight
- 344 g
What reviewers say
Both enjoy the compact body, pleasing photographs, effective stabilisation and accessible colour and monochrome profiles. Amateur Photographer finds the viewfinder clear and the menus easy to use, but notes weaker high-ISO detail and marks on its silver test body. CameraLabs finds the viewfinder small and observes autofocus hesitation on its pre-production sample. Both find the video limited by 8-bit recording and the lack of 4K 60 fps; high-resolution composites work best with still subjects.
From amateurphotographer.com and cameralabs.com
Specifications
Report a wrong or missing specImage and sensor
- Camera type
- Mirrorless
- Sensor format
- Four Thirds
- Sensor type
- Live MOS
- Sensor dimensions
- 17.4 × 13 mm
- Effective resolution
- 20.4 MP
- Largest image
- 5184 × 3888
- RAW recording
- Yes
- Standard ISO range
- 200–25600
- Sensor detail
- Approximately 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 formats
- JPEG 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 detail
- ISO 200–25600 with expanded LOW approximately 64 and 100; default Auto upper limit 6400
- Image processor
- TruePic IX
Lens and shooting
- Lens mount
- Micro Four Thirds
- Stabilisation
- Sensor shift
- Maximum continuous burst
- 30 fps
- Autofocus
- 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
- Shutter
- Mechanical 1/4000–60 seconds; electronic 1/32000–60 seconds; Bulb, Live Time and Live Composite modes
- Burst detail
- Electronic 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 detail
- Five-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 controls
- PASM, Live ND2–16, focus stacking, HDR and multiple exposure; restrictions depend on shooting mode and lens
Video
- Highest video resolution
- 4096 × 2160 at 24 fps
- Video detail
- Internal 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)
- Audio
- Built-in stereo microphones; external 3.5 mm microphone socket; 48 kHz/16-bit or 96 kHz/24-bit audio
Screen and viewfinder
- Viewfinder
- Electronic
- Screen size
- 3″
- Screen dots
- 1,040,000
- Touchscreen
- Yes
- Tilting screen
- Yes
- Display detail
- Fully articulated 3-inch approximately 1.04-million-dot touchscreen; touchscreen menu operation
- Viewfinder detail
- OLED 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-Fi
- Yes
- Bluetooth
- Yes
- Battery life (maker's claim)
- 410 photographs
- Body weight
- 344 g
- Release detail
- Maker 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 media
- One SD/SDHC/SDXC slot; UHS-I
- Ports
- USB 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 connections
- Wi-Fi b/g/n and Bluetooth Low Energy 5.2; smartphone GPS tagging rather than built-in GPS
- Battery life detail
- BLS-7; approximately 410 CIPA shots using EVF or LCD; approximately 80 minutes CIPA video or 130 minutes with zoom and other operations disabled
- Charging
- In-camera USB charging with camera off; no USB Power Delivery (maker Japan)
- Dimensions
- Approximately 125.8×74.5×43.3 mm excluding protrusions (maker Japan)
- Weight detail
- 344 g body only or 393 g including battery and card (maker Japan); pictured kit lens excluded. CameraLabs pre-production dimensions and loaded weight differ
- Materials
- Dust-resistant and IPX1 splash resistance with an OM SYSTEM splashproof lens; not an immersion rating. Operating temperature 0–40°C
- Colours
- Black and silver
Pros and cons
Pros
- Five-axis sensor stabilisation
- Electronic viewfinder and articulated touchscreen
- Handheld high-resolution and Live ND modes
Cons
- One UHS-I SD slot
- No 4K 60 fps recording
- 8-bit video recording
Closest rivals
Model | Type | Sensor | Megapixels | Lens | Video | Body weight | Released |
|---|---|---|---|---|---|---|---|
| Mirrorless | Four Thirds | 20.4 | Micro Four Thirds | 4096 × 2160 at 60 fps | 413 g | Feb 2026 | |
| Mirrorless | Four Thirds | 20.3 | Micro Four Thirds | 3840 × 2160 at 30 fps | 478 g | Feb 2025 | |
| Mirrorless | Four Thirds | 20.4 | Micro Four Thirds | 4096 × 2160 at 60 fps | 413 g | Feb 2025 |
Sources
- explore.omsystem.com/gb/en/pen
- jp.omsystem.com/product/dslr/pen/pen/spec.html
- jp.omsystem.com/product/dslr/pen/pen/index.html
- prnewswire.com/news-releases/introducing-the-om-system-pen-interchangeable-lens…
- amateurphotographer.com/review/om-system-pen-review
- cameralabs.com/om-system-pen-review
Photo: Maker front photograph with 14–42mm III kit lens; body specifications exclude lens
- OM System PEN, front screen open view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, rear view in Silver: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, rear screen open view in Silver: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, top view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, bottom view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, left side view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, right side view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, front left three quarter view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
- OM System PEN, front right three quarter view in Silver; 14–42mm III kit lens: Official maker product gallery photograph; Silver 14–42mm III lens kit, body specifications exclude lens
