DJI
Osmo Action 4
1/1.3-inch sensor action camera with 10-bit D-Log M and strong stabilization.
$299
Released Aug 2023
OM System
OM-1 II
Flagship MFT with stacked sensor, 120fps, and pro wildlife features.
$2,399
Released Feb 2024
OM-1 II is 6 months newer.
Wins
Osmo Action 4
Wins
OM-1 II
1 categories tied
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TL;DR — Key differences
- BOM-1 II has higher AF points / zones (1053 vs 0)
- BOM-1 II has higher ISO max (native) (102,400 vs 12,800)
- BOM-1 II has higher Burst (electronic) (120 fps vs 15 fps)
- AOsmo Action 4 has lower Weight (145 g vs 599 g)
- BOM-1 II has higher Resolution (20.4 MP vs 10 MP)
Key specs at a glance
Size and weight, to scale
Osmo Action 4
71 × 44 × 33 mm
145 g (0.32 lb / 5.11 oz)
OM-1 II
135 × 92 × 73 mm
599 g (1.32 lb / 21.13 oz)
Osmo Action 4 is 64mm narrower, 47mm shorter, and 40mm thinner than OM-1 II.
Osmo Action 4 is 454 g lighter than OM-1 II.
Depth (front-to-back): 33mm Osmo Action 4 · 73mm OM-1 II
Sensor size, to scale
OM-1 II
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
Osmo Action 4: mount data unavailable
OM-1 II
✓ more lensesMicro Four Thirds
130+
native lenses available
Counts include current first-party and major third-party native autofocus lenses.
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose
Osmo Action 4
Dimensions (W×H×D mm)
Adds 70.5, 44.2, 32.8
Card types
Adds microSD
Weight
145 g vs 599 g — lower is better
4K max frame rate
120 fps vs 60 fps — higher is better
Codecs
Adds HEVC
Max video bit rate
200 Mbps vs 150 Mbps — higher is better
Battery life (CIPA)
640 shots vs 520 shots — higher is better
Reasons to choose
OM-1 II
AF points / zones
1053 vs 0 — higher is better
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 134.8, 91.6, 72.7
Card types
Adds SD UHS-II, SD UHS-I
ISO max (native)
102,400 vs 12,800 — higher is better
Burst (electronic)
120 fps vs 15 fps — higher is better
Codecs
Adds H.265, MOV
Resolution
20.4 MP vs 10 MP — higher is better
Both cameras share
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 1
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
- ✓Bluetooth — Both support bluetooth
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Osmo Action 4
Pros
- ✓10-bit D-Log M
- ✓Good low light for action cam
- ✓Affordable
Cons
- –Superseded by Action 5 Pro
- –Fixed lens
OM-1 II
Pros
- ✓120fps stills
- ✓Stacked MFT
- ✓IP53 weather sealing
- ✓Computational features
Cons
- –MFT sensor size
- –Smaller ecosystem
- –Menu complexity
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, Osmo Action 4 or OM-1 II?
OM-1 II scores 8.5/10 versus 5.0/10 for Osmo Action 4 — 120fps burst — pro-level action capture.
What's the resolution difference between the Osmo Action 4 and OM-1 II?
Osmo Action 4 is 10 MP and OM-1 II is 20.4 MP, so the OM-1 II captures more detail for cropping and large prints.
Do the Osmo Action 4 and OM-1 II have in-body image stabilization?
Osmo Action 4 does not have IBIS, while oM-1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the Osmo Action 4 or the OM-1 II?
Osmo Action 4 reaches 15 fps electronic. OM-1 II reaches 120 fps electronic.
What's the weight difference between the Osmo Action 4 and OM-1 II?
Osmo Action 4 weighs 145 g and OM-1 II weighs 599 g, so the Osmo Action 4 is 454 g lighter.
Do the Osmo Action 4 and OM-1 II record 4K video?
Osmo Action 4: 4K up to 120p. OM-1 II: 4K up to 60p.
Are the Osmo Action 4 and OM-1 II weather sealed?
Osmo Action 4: Yes. OM-1 II: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the Osmo Action 4 and 520 shots for the OM-1 II, giving the Osmo Action 4 the edge.
How much does each cost?
Osmo Action 4 launched at $299 and OM-1 II at $2,399. The Osmo Action 4 is $2,100 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.