Canon
EOS R1
Flagship 24.2MP full-frame BSI stacked RF body with 40fps burst, Dual Pixel Intelligent AF, 6K RAW, and 9.44M-dot EVF.
$6,299
Released Jul 2024
DJI
Osmo Action 4
1/1.3-inch sensor action camera with 10-bit D-Log M and strong stabilization.
$299
Released Aug 2023
EOS R1 is 11 months newer.
Wins
EOS R1
Wins
Osmo Action 4
2 categories tied
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TL;DR — Key differences
- AEOS R1 has higher AF points / zones (1053 vs 0)
- AEOS R1 has higher ISO max (native) (102,400 vs 12,800)
- BOsmo Action 4 has lower Weight (145 g vs 1115 g)
- AEOS R1 has higher Burst (electronic) (40 fps vs 15 fps)
- AEOS R1 has higher Resolution (24.2 MP vs 10 MP)
Key specs at a glance
Size and weight, to scale
EOS R1
158 × 150 × 87 mm
1115 g (2.46 lb / 39.33 oz)
Osmo Action 4
71 × 44 × 33 mm
145 g (0.32 lb / 5.11 oz)
EOS R1 is 87mm wider, 105mm taller, and 55mm thicker than Osmo Action 4.
EOS R1 is 970 g heavier than Osmo Action 4.
Depth (front-to-back): 87mm EOS R1 · 33mm Osmo Action 4
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R1
158 × 150 mm
Osmo Action 4
71 × 44 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R1
158 × 87 mm
Osmo Action 4
71 × 33 mm
Sensor size, to scale
EOS R1
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
EOS R1
✓ more lensesCanon RF
105+
native lenses available
Osmo Action 4: mount data unavailable
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
EOS R1
AF points / zones
1053 vs 0 — higher is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
Card types
Adds CFexpress Type B, CFexpress Type B
ISO max (native)
102,400 vs 12,800 — higher is better
Codecs
Adds RAW, XF-HEVC S, XF-AVC S…
Burst (electronic)
40 fps vs 15 fps — higher is better
Resolution
24.2 MP vs 10 MP — higher is better
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 1115 g — lower is better
Codecs
Adds HEVC
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.
EOS R1
Pros
- ✓40fps electronic burst
- ✓24.2MP BSI stacked full-frame sensor
- ✓Dual Pixel Intelligent AF
- ✓6K RAW and 4K 120p video
- ✓Dual CFexpress Type B slots
Cons
- –24MP resolution
- –Very expensive
- –Large integrated-grip body
Osmo Action 4
Pros
- ✓10-bit D-Log M
- ✓Good low light for action cam
- ✓Affordable
Cons
- –Superseded by Action 5 Pro
- –Fixed lens
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, EOS R1 or Osmo Action 4?
EOS R1 scores 7.5/10 versus 1.0/10 for Osmo Action 4 — 24.2MP — solid resolution.
What's the resolution difference between the EOS R1 and Osmo Action 4?
EOS R1 is 24.2 MP and Osmo Action 4 is 10 MP, so the EOS R1 captures more detail for cropping and large prints.
Do the EOS R1 and Osmo Action 4 have in-body image stabilization?
EOS R1 has 8.5-stop in-body image stabilization, while osmo Action 4 does not have IBIS.
Which shoots faster bursts — the EOS R1 or the Osmo Action 4?
EOS R1 reaches 40 fps electronic. Osmo Action 4 reaches 15 fps electronic.
What's the weight difference between the EOS R1 and Osmo Action 4?
EOS R1 weighs 1115 g and Osmo Action 4 weighs 145 g, so the Osmo Action 4 is 970 g lighter.
Do the EOS R1 and Osmo Action 4 record 4K video?
EOS R1: 6K RAW (max), 4K up to 120p. Osmo Action 4: 4K up to 120p.
Are the EOS R1 and Osmo Action 4 weather sealed?
EOS R1: Yes. Osmo Action 4: Yes.
How much does each cost?
EOS R1 launched at $6,299 and Osmo Action 4 at $299. The Osmo Action 4 is $6,000 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and DJI press materials.