Head to head · specs cited · drawn to scale
Olympus OM-D E-M10 Mark IV vs OM System OM-1
Every spec below is quoted from the makers' official pages — where a figure isn't published we say so rather than guess. Sizes are drawn at true relative scale from published dimensions, and the bag-fit row is computed against our measured bag catalog.
The 3 biggest published differences
- Burst — electronic: the OM-1 leads at 120fps S-AF (RAW) vs the E-M10 IV's Approx. 15fps.
- Burst — mechanical: the OM-1 leads at 50fps C-AF & AE Tracking (RAW) vs the E-M10 IV's Approx. 8.7fps.
- EVF resolution: the OM-1 leads at 5760K dots vs the E-M10 IV's 2360K dots.
 E-M10 IV Micro Four Thirds |  OM-1 Micro Four Thirds | |
|---|---|---|
| Overview | ||
| Type | Mirrorless | Mirrorless |
| Format | 4/3'' (Four Thirds) | Micro Four Thirds, 4:3 / 17.3 x 13.0mm |
| Lens mount | Micro Four Thirds | Micro Four Thirds |
| Released | —, not published | —, not published |
| Sensor & Image | ||
| Sensor type | Live MOS sensor | 4/3'' Stacked BSI Live MOS sensor |
| Sensor size | 4/3'' (Four Thirds) | Micro Four Thirds, 4:3 / 17.3 x 13.0mm |
| Resolution (MP) | 20.3 | 20.4 Megapixels effective; 22.9 Megapixels full resolution |
| In-body stabilisation | 4.5 | Built-in 5-axis, up to 8 EV steps |
| ISO range | 200 (Manual); LOW approx.100 extended | Manual: LOW (approx.80, approx.100), 200-102400; Auto: LOW (approx.80)-102400 (Default: 200-25600) |
| Autofocus & Speed | ||
| AF system | Contrast Detection AF system | TTL phase difference detection system, contrast detection system; 1053 points / cross-type phase detection AF |
| Subject detection | 121 points / All target, Group target (9-areas), Single target | Intelligent Subject Detection: Aircrafts, Birds, Bullet trains, Cats, Dogs, Formula cars, Helicopters, Motorcycles, Rally cars, Standard trains, Steam locomotives |
| Burst — mechanical | Approx. 8.7fps | 50fps C-AF & AE Tracking (RAW) |
| Burst — electronic | Approx. 15fps | 120fps S-AF (RAW) |
| Video | ||
| Max video | 4K (3840 x 2160) / 30p, 25p, 24p | 4K, C4K, Full HD; High Speed Movie FHD at 240fps |
| Codecs / sampling | MOV(MPEG-4AVC/H.264) | MOV (MPEG-4 AVC/H.264); MOV (HEVC/H.265) |
| Recording limit | 29min | Unlimited |
| Viewfinder & Screen | ||
| EVF resolution | 2360K dots | 5760K dots |
| EVF magnification | Max. 1.23x | Max. 1.65x with a 50mm lens set to infinity |
| Rear screen | 7.6cm / 3.0'' (3:2), 1037K dots, tilting touch panel | 7.6cm / 3.0'' (3:2), 1620K dots |
| Body & Handling | ||
| Dimensions (W×H×D) | 121.7 × 84.6 × 49 mm | 138.8 × 91.6 × 72.7 mm |
| Weight (body) | 383 g | 599 g |
| Weather sealing | —, not published | IEC Standard publication 60529 IP53 |
| Shutter durability | —, not published | 400000 shots |
| Power & Storage | ||
| Battery life (CIPA) | Approx. 360 images | 520 shots (using BLX-1 under CIPA testing conditions) |
| Battery | BLS-50 Lithium-Ion Battery | BLX-1 Lithium-Ion Battery |
| Card slots | SD Memory Card (SDHC, SDXC, UHS-I, UHS-II) | Dual SD card |
| Connectivity | ||
| USB | —, not published | USB 3 Type C |
| Wireless | Bluetooth®, Wi-Fi | Wi-Fi; Bluetooth Low Energy Ver.4.2 |
| HDMI | Micro connector (Type D) | Micro connector (Type D) |
| Price | ||
| Launch price | $599.99 | —, not published |
| Size, to scale | ||
Front view, drawn at the same scale from each maker's published W×H (mm). | ||
| Smallest bag that fits | ||
| Body + standard zoom | Think Tank Mirrorless Mover 20 V2 Fits body only · View at B&H Photo Video | Think Tank Mirrorless Mover 20 V2 Fits body only · View at B&H Photo Video |
Sources
“4/3'' Live MOS sensor; Effective pixels 20.3 Megapixels; Built-in 5-axis Up to 4.5 EV steps; 121 points / All target, Group target (9-areas), Single target; Approx. 8.7fps (mech.) / Approx. 15fps (electronic)”
official · OM-1 specifications: OM System (official UK product/specifications page) · accessed 2026-07-10
“4/3'' Stacked BSI Live MOS sensor, 20.4 Megapixels effective; Built-in 5-axis Up to 8 EV steps; 1053 points / cross-type phase detection AF; Mechanical shutter 50fps C-AF & AE Tracking (RAW)”
Spec values are the manufacturers' published figures, compared factually — we don't rank cameras. Fit verdicts are planning estimates from published interior dimensions, not guarantees. See methodology.
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