OM SYSTEM OM-3 vs OM SYSTEM OM-5 Mark II

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OM-3 compared with OM-5 Mark II

	OM SYSTEMOM-3	OM SYSTEMOM-5 Mark II
Overview
Released
Released	February 2025	July 2025
Image and sensor
Camera type
Camera type	Mirrorless	Mirrorless
Sensor format
Sensor format	Four Thirds	Four Thirds
Sensor type
Sensor type	Stacked BSI Live MOS	Live MOS
Sensor dimensions
Sensor dimensions	17.3 × 13 mm	17.4 × 13 mm
Effective resolution
Effective resolution	20.4 MP	20.4 MP
Largest image
Largest image	5184 × 3888	5184 × 3888
RAW recording
RAW recording	Yes	Yes
Standard ISO range
Standard ISO range	80–102400	200–25600
Sensor detail
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	Maker 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 mm
Image formats
Image formats	ORF RAW and JPEG; high-resolution modes combine eight exposures and can save composite RAW; moving subjects and capture conditions affect results	JPEG 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 sensor
ISO detail
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	Manual ISO 200–25600, expanded LOW approximately 64 and 100; default Auto upper limit 6400 (maker Japan)
Image processor
Image processor	TruePic X	TruePic IX
Lens and shooting
Lens mount
Lens mount	Micro Four Thirds	Micro Four Thirds
Stabilisation
Stabilisation	Lens and sensor shift	Lens and sensor shift
Maximum continuous burst
Maximum continuous burst	120 fps	30 fps
Lens detail
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
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)	Hybrid sensor phase/contrast, 121 cross-type phase positions; face/eye recognition and Starry Sky AF, without animal/vehicle subject recognition (both reviews)
Shutter
Shutter	Mechanical focal-plane 1/8000–60 seconds and Bulb up to 30 minutes; electronic high-speed modes have additional restrictions	Mechanical 1/8000–60 seconds; electronic 1/32000–60 seconds; Bulb and Live Composite modes
Burst detail
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	Electronic 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 differ
Stabilisation detail
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	Five-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 off
Flash
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
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	PASM and computational-photography CP button; Live ND2–16, focus stacking, HDR and multiple exposures; mode, ISO, shutter, flash and compatible-lens restrictions apply
Video
Highest video resolution
Highest video resolution	4096 × 2160 at 60 fps	4096 × 2160 at 24 fps
Video detail
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	Internal 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 profiles
Audio
Audio	Maker MOV settings include 48 kHz/16-bit and 96 kHz/24-bit; external 3.5 mm microphone and headphone connections	Internal stereo microphones, external 3.5 mm microphone input; 48 kHz/16-bit or 96 kHz/24-bit recording
Screen and viewfinder
Viewfinder
Viewfinder	Electronic	Electronic
Screen size
Screen size	3″	3″
Screen dots
Screen dots	1,620,000	1,037,000
Touchscreen
Touchscreen	Yes	Yes
Tilting screen
Tilting screen	Yes	Yes
Display detail
Display detail	Fully articulated three-inch touchscreen, approximately 1.62 million dots; connected port cables can restrict rotation (Amateur Photographer)	Fully articulated touchscreen; UK table 1.037 million dots, Japan rounds to 1.04 million
Viewfinder detail
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	OLED approximately 2.36 million dots, approximately 100% coverage; maximum 1.37× with 50mm lens at infinity at −1 dioptre depends on finder style
Connections and design
Wi-Fi
Wi-Fi	Yes	Yes
Bluetooth
Bluetooth	Yes	Yes
Battery life (maker's claim)
Battery life (maker's claim)	590 photographs	310 photographs
Body weight
Body weight	413 g	370 g (better)
Release detail
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	Maker US release confirms early July 2025 retail; Japan 18 July local date. Earliest worldwide day unconfirmed, so month precision retained
Recording media
Recording media	One SD/SDHC/SDXC slot with UHS-I and UHS-II support	One SD/SDHC/SDXC slot, UHS-I and UHS-II
Ports
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	USB 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 speed
Wireless connections
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	Wi-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 GPS
Battery life detail
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	BLS-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 conditions
Charging
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	In-camera USB charging with power off; USB power supply supported, but no USB Power Delivery. Charger not supplied
Dimensions
Dimensions	Approximately 139.3 × 88.9 × 45.8 mm, excluding protrusions	Approximately 125.3×85.2×52 mm excluding protrusions (maker Japan and US launch); UK table gives conflicting 49.7 mm depth
Weight detail
Weight detail	Approximately 413 g body only or 496 g including battery and memory card; photographed 12–45mm kit lens excluded	Maker 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 excluded
Materials
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	IP53 with specified IP53 lens, IPX1 with IPX1 lens; weather qualification excludes charging and HDMI. Operation −10 to 40°C; not an immersion rating
Colours
Colours	Silver-and-black body	Black, silver and sand beige; kit availability varies by region