DJI
Osmo Action 4
1/1.3-inch sensor action camera with 10-bit D-Log M and strong stabilization.
$299
Released Aug 2023
Sony
Alpha 1 II
50MP stacked flagship with 30fps RAW, 8K video, and Sony's fastest hybrid performance.
$6,499
Released Nov 2024
Alpha 1 II is 1.3 years newer.
Wins
Osmo Action 4
Wins
Alpha 1 II
2 categories tied
Check current prices
Search these camera bodies at major authorized retailers to check current discounts, bundled lenses, and certified refurbished deals:
TL;DR — Key differences
- BAlpha 1 II has higher AF points / zones (759 vs 0)
- AOsmo Action 4 has lower Weight (145 g vs 743 g)
- BAlpha 1 II has higher Resolution (50.1 MP vs 10 MP)
- BAlpha 1 II has higher RAW buffer depth (200 frames vs 60 frames)
- BAlpha 1 II has higher ISO max (native) (32,000 vs 12,800)
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)
Alpha 1 II
136 × 97 × 83 mm
743 g (1.64 lb / 26.21 oz)
Osmo Action 4 is 66mm narrower, 53mm shorter, and 50mm thinner than Alpha 1 II.
Osmo Action 4 is 598 g lighter than Alpha 1 II.
Depth (front-to-back): 33mm Osmo Action 4 · 83mm Alpha 1 II
Sensor size, to scale
Alpha 1 II
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
Osmo Action 4: mount data unavailable
Alpha 1 II
✓ more lensesSony E
350+
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 743 g — lower 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
Alpha 1 II
AF points / zones
759 vs 0 — higher is better
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Card types
Adds CFexpress Type A, SD UHS-II
Resolution
50.1 MP vs 10 MP — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
RAW buffer depth
200 frames vs 60 frames — higher is better
ISO max (native)
32,000 vs 12,800 — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓4K max frame rate — Both 120 fps
- ✓Weather sealing — Both support weather sealing
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
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
Alpha 1 II
Pros
- ✓50MP stacked sensor
- ✓30fps blackout-free burst
- ✓8K 30p video
- ✓Best Sony AF
Cons
- –Very expensive
- –Complex menus
- –Large files
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, Osmo Action 4 or Alpha 1 II?
Alpha 1 II scores 8.5/10 versus 1.0/10 for Osmo Action 4 — 50.1MP — excellent for large prints and crops.
What's the resolution difference between the Osmo Action 4 and Alpha 1 II?
Osmo Action 4 is 10 MP and Alpha 1 II is 50.1 MP, so the Alpha 1 II captures more detail for cropping and large prints.
Do the Osmo Action 4 and Alpha 1 II have in-body image stabilization?
Osmo Action 4 does not have IBIS, while alpha 1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the Osmo Action 4 or the Alpha 1 II?
Osmo Action 4 reaches 15 fps electronic. Alpha 1 II reaches 30 fps electronic.
What's the weight difference between the Osmo Action 4 and Alpha 1 II?
Osmo Action 4 weighs 145 g and Alpha 1 II weighs 743 g, so the Osmo Action 4 is 598 g lighter.
Do the Osmo Action 4 and Alpha 1 II record 4K video?
Osmo Action 4: 4K up to 120p. Alpha 1 II: 8K (max), 4K up to 120p.
Are the Osmo Action 4 and Alpha 1 II weather sealed?
Osmo Action 4: Yes. Alpha 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 Alpha 1 II, giving the Osmo Action 4 the edge.
How much does each cost?
Osmo Action 4 launched at $299 and Alpha 1 II at $6,499. The Osmo Action 4 is $6,200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of DJI and Sony press materials.