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 7R VI
66.8MP fully-stacked full-frame high-resolution body with 30fps bursts, 8K 30p, 4K 120p, and Sony's new BIONZ XR2 engine.
$4,499
Released Jun 2026
Alpha 7R VI is 2.8 years newer.
Wins
Osmo Action 4
Wins
Alpha 7R VI
2 categories tied
TL;DR — Key differences
- BAlpha 7R VI has higher AF points / zones (759 vs 0)
- BAlpha 7R VI has higher Resolution (66.8 MP vs 10 MP)
- AOsmo Action 4 has lower Weight (145 g vs 713 g)
- BAlpha 7R VI has higher Max video bit rate (600 Mbps vs 200 Mbps)
- BAlpha 7R VI 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 7R VI
133 × 97 × 83 mm
713 g (1.57 lb / 25.15 oz)
Osmo Action 4 is 62mm narrower, 53mm shorter, and 50mm thinner than Alpha 7R VI.
Osmo Action 4 is 568 g lighter than Alpha 7R VI.
Depth (front-to-back): 33mm Osmo Action 4 · 83mm Alpha 7R VI
Back view, to scale
Width × Height — same proportions as the front of the body.
Osmo Action 4
71 × 44 mm
Alpha 7R VI
133 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Osmo Action 4
71 × 33 mm
Alpha 7R VI
133 × 83 mm
Sensor size, to scale
Alpha 7R VI
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
Osmo Action 4: mount data unavailable
Alpha 7R VI
✓ 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 713 g — lower is better
Pre-Capture / Pre-Release
Only Osmo Action 4 supports it
Codecs
Adds HEVC
Weather sealing
Only Osmo Action 4 supports it
Battery life (CIPA)
640 shots vs 600 shots — higher is better
Reasons to choose
Alpha 7R VI
AF points / zones
759 vs 0 — higher is better
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 132.7, 96.9, 82.9
Card types
Adds CFexpress Type A, SDXC UHS-II
Resolution
66.8 MP vs 10 MP — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
Max video bit rate
600 Mbps vs 200 Mbps — higher is better
ISO max (native)
32,000 vs 12,800 — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓4K max frame rate — Both 120 fps
- ✓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
Alpha 7R VI
Pros
- ✓66.8MP fully-stacked Exmor RS sensor
- ✓30fps blackout-free electronic burst
- ✓8K 30p and 4K 120p video
- ✓8.5-stop in-body stabilization
- ✓9.44M-dot HDR OLED EVF
Cons
- –Very expensive
- –Large files demand fast cards and storage
- –8K workflow can be heavy
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, Osmo Action 4 or Alpha 7R VI?
Alpha 7R VI scores 8.5/10 versus 1.0/10 for Osmo Action 4 — 66.8MP — excellent for large prints and crops.
What's the resolution difference between the Osmo Action 4 and Alpha 7R VI?
Osmo Action 4 is 10 MP and Alpha 7R VI is 66.8 MP, so the Alpha 7R VI captures more detail for cropping and large prints.
Do the Osmo Action 4 and Alpha 7R VI have in-body image stabilization?
Osmo Action 4 does not have IBIS, while alpha 7R VI has in-body image stabilization.
Which shoots faster bursts — the Osmo Action 4 or the Alpha 7R VI?
Osmo Action 4 reaches 15 fps electronic. Alpha 7R VI reaches 30 fps electronic.
What's the weight difference between the Osmo Action 4 and Alpha 7R VI?
Osmo Action 4 weighs 145 g and Alpha 7R VI weighs 713 g, so the Osmo Action 4 is 568 g lighter.
Do the Osmo Action 4 and Alpha 7R VI record 4K video?
Osmo Action 4: 4K up to 120p. Alpha 7R VI: 8K (max), 4K up to 120p.
Are the Osmo Action 4 and Alpha 7R VI weather sealed?
Osmo Action 4: Yes. Alpha 7R VI: No.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the Osmo Action 4 and 600 shots for the Alpha 7R VI, giving the Osmo Action 4 the edge.
How much does each cost?
Osmo Action 4 launched at $299 and Alpha 7R VI at $4,499. The Osmo Action 4 is $4,200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of DJI and Sony press materials.