DJI
Osmo Action 4
1/1.3-inch sensor action camera with 10-bit D-Log M and strong stabilization.
$299
Launch priceReleased Aug 2023
Insta360
Ace Pro 2
8K Leica-lens action camera with 1/1.3-inch sensor, 4K60 Active HDR, PureVideo low-light mode, and 12m waterproofing.
$449
Launch priceReleased Oct 2024
Ace Pro 2 is 1.3 years newer.
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Wins
Osmo Action 4
Wins
Ace Pro 2
5 categories tied
Which would you choose?
TL;DR — Key differences
- BAce Pro 2 has higher Resolution (50 MP vs 10 MP)
- AOsmo Action 4 has higher ISO max (native) (12,800 vs 6,400)
- BAce Pro 2 has higher RAW buffer depth (120 frames vs 60 frames)
- AOsmo Action 4 has higher 4K max frame rate (120 fps vs 60 fps)
- AOsmo Action 4 has higher Waterproof depth (18 m vs 12 m)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareOsmo Action 4
71 × 44 × 33 mm
145 g (0.32 lb / 5.11 oz)
Credit card
85.6 × 54 mm
for scale
Ace Pro 2
72 × 52 × 38 mm
177.2 g (0.39 lb / 6.25 oz)
Osmo Action 4 is 1mm narrower, 8mm shorter, and 5mm thinner than Ace Pro 2.
Osmo Action 4 is 32 g lighter than Ace Pro 2.
Depth (front-to-back): 33mm Osmo Action 4 · 38mm Ace Pro 2
Back view, to scale
Width × Height — same proportions as the front of the body.
Osmo Action 4
71 × 44 mm
Credit card
85.6 × 54 mm
Ace Pro 2
72 × 52 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Osmo Action 4
71 × 33 mm
Credit card
85.6 × 54 mm
Ace Pro 2
72 × 38 mm
Sensor size, to scale
Ace Pro 2
9.6 × 7.2 mm · Compact
69 mm² area
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
Stabilization modes
Adds RockSteady, HorizonBalancing, HorizonSteady
Dimensions (W×H×D mm)
Adds 70.5, 44.2, 32.8
ISO max (native)
12,800 vs 6,400 — higher is better
4K max frame rate
120 fps vs 60 fps — higher is better
Codecs
Adds HEVC
Waterproof depth
18 m vs 12 m — higher is better
Weight
145 g vs 177.2 g — lower is better
Reasons to choose
Ace Pro 2
Stabilization modes
Adds FlowState, Horizon Lock 360°, Active HDR…
Dimensions (W×H×D mm)
Adds 71.9, 52.2, 38
Resolution
50 MP vs 10 MP — higher is better
RAW buffer depth
120 frames vs 60 frames — higher is better
Internal RAW video
Only Ace Pro 2 supports it
Codecs
Adds H.265
Burst (mechanical)
8 fps vs 6 fps — higher is better
Burst (electronic)
20 fps vs 15 fps — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓1080p max frame rate — Both 240 fps
- ✓Max video bit rate — Both 200 Mbps
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 1
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
Ace Pro 2
Pros
- ✓8K30 video
- ✓1/1.3-inch Leica lens
- ✓PureVideo night mode
- ✓12m waterproof
Cons
- –8K drains battery faster
- –Premium vs DJI Action
- –Fixed lens
Decided which one is right for you?
Compare live prices for the Osmo Action 4 and Ace Pro 2 at major authorized retailers.
DJI Osmo Action 4
Insta360 Ace Pro 2
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, Osmo Action 4 or Ace Pro 2?
Ace Pro 2 scores 5.0/10 versus 1.5/10 for Osmo Action 4 — 50MP — massive detail for large prints.
What's the resolution difference between the Osmo Action 4 and Ace Pro 2?
Osmo Action 4 is 10 MP and Ace Pro 2 is 50 MP, so the Ace Pro 2 captures more detail for cropping and large prints.
How does stabilization compare between the Osmo Action 4 and Ace Pro 2?
Osmo Action 4 uses Electronic image stabilization (electronic), while Ace Pro 2 uses FlowState electronic stabilization (electronic).
Which shoots faster bursts — the Osmo Action 4 or the Ace Pro 2?
Osmo Action 4 reaches 15 fps electronic. Ace Pro 2 reaches 20 fps electronic.
What's the weight difference between the Osmo Action 4 and Ace Pro 2?
Osmo Action 4 weighs 145 g and Ace Pro 2 weighs 177.2 g, so the Osmo Action 4 is 32 g lighter.
Do the Osmo Action 4 and Ace Pro 2 record 4K video?
Osmo Action 4: 4K up to 120p. Ace Pro 2: 8K (max), 4K up to 60p.
Are the Osmo Action 4 and Ace Pro 2 weather sealed?
Osmo Action 4: Yes. Ace Pro 2: Yes.
Which has better battery runtime?
Osmo Action 4 is rated for about 160 minutes of continuous recording and Ace Pro 2 for about 180 minutes, giving the Ace Pro 2 the edge.
How much does each cost?
Osmo Action 4 launched at $299 and Ace Pro 2 at $449. The Osmo Action 4 is $150 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Osmo Action 4 vs Ace Pro 2 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of DJI and Insta360 press materials.