Two weather-sealed Micro Four Thirds bodies, one flagship and one rugged all-rounder. We compare sensor, autofocus, burst, video, and stabilization to settle whether the OM-1 II is worth nearly double.
Updated: October 2026
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Choose if: You shoot fast-moving wildlife, birds, or sports and want the best autofocus, burst, and video in the system. The flagship to grow into.
Choose if: You hike, travel, and shoot landscapes and want pro weather-sealing and class-leading IBIS in the lightest, most affordable MFT body.
| Specification | OM System OM-1 Mark II | OM System OM-5 |
|---|---|---|
| Sensor | 20MP Stacked BSI Live MOS MFT | 20MP Micro Four Thirds Live MOS |
| Processor | TruePic X | TruePic IX |
| Video (Max) | C4K/4K 60p, FHD 240p | 4K30 (Cinema 4K 4096×2160) |
| Internal Recording | 10-bit 4:2:2 (H.265) | 8-bit 4:2:0 (H.264/H.265) |
| Autofocus | 1,053-point cross-type PDAF, AI subject detection | 121-point cross-type on-chip PDAF |
| Subject Detection | Human, Animal, Bird, Vehicle, Insect | Human + Animal Face/Eye |
| IBIS | 5-axis, 8.5 stops (with Sync IS) | 5-axis, 8.5 stops (8 stops with Sync IS) |
| Burst Speed | 120fps (locked AF), 50fps (AF/AE) | 30fps electronic, 10fps mechanical |
| Viewfinder | 5.76M-dot OLED, 0.83x, 120fps | 2.36M-dot OLED, 120fps |
| Screen | 3.0" vari-angle, 1.62M-dot | 3.0" vari-angle, 1.04M-dot |
| Card Slots | Dual SD UHS-II | 1x SD UHS-II |
| Weather Sealing | IP53 (dust + splash), -10°C | IP53 (dust + splash), -10°C |
| Battery Life | BLX-1, ~500 shots (CIPA) | BLS-50, ~310 shots |
| Weight | 599g (with battery and card) | 414g (body only) |
Spec figures from the makers: OM System OM-1 Mark II (explore.omsystem.com, checked 26 Sept 2026)
This is the single biggest gap between the two bodies. The OM-1 II's stacked sensor unlocks a far more advanced AF system:
Winner: OM-1 Mark II, decisively. If you shoot action or wildlife, this alone justifies the upgrade.
The OM-1 II's stacked sensor is built for speed, and it shows in both frame rates and buffering:
Winner: OM-1 Mark II. 30fps is still capable for wildlife, but the flagship operates in a different league.
The OM-1 II is a far more serious video tool:
Winner: OM-1 Mark II. 4K60, 10-bit, and no listed maximum recording time put it clearly ahead for hybrid shooters.
This is where the OM-5 closes the gap, and where the value case is made. Both bodies share the OM System hallmarks:
Winner: Tie on IBIS and sealing; OM-5 for sheer lightness and pack-friendliness.
If you shoot action or video: The OM-1 Mark II is worth the premium. The stacked sensor, 1,053-point AI autofocus, 120fps burst, and 4K60 are upgrades the OM-5 simply cannot match.
If you shoot travel or landscapes: The OM-5 delivers the same 8.5-stop IBIS, the same IP53 sealing, and the same computational tricks in a body 185g lighter. What it gives up is speed: the stacked sensor, the 120fps burst and 4K60.
Both share the same 20MP MFT image quality. The decision is about speed and video versus weight and value, not picture quality.
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