Canon
EOS R6 Mark III
Hybrid 32.5MP full-frame RF body with 7K RAW video, 40fps electronic burst, 8.5-stop IBIS, and Dual Pixel CMOS AF II.
$2,799
Launch priceReleased Nov 2025
Xtra
Atto
Ultra-compact 54g wearable action camera with 1/1.3-inch sensor, 4K/60fps, 143° FOV, 128GB internal storage, and 220-min battery with Vision Dock.
$299
Launch priceReleased Jan 2026
Atto is 3 months newer.
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Wins
EOS R6 Mark III
Wins
Atto
2 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R6 Mark III has higher AF points / zones (1053 vs 0)
- AEOS R6 Mark III has higher Card slots (2 vs 0)
- BAtto has lower Weight (54 g vs 699 g)
- AEOS R6 Mark III has higher ISO max (native) (64,000 vs 6,400)
- AEOS R6 Mark III has higher 4K max frame rate (120 fps vs 60 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
Credit card
85.6 × 54 mm
for scale
EOS R6 Mark III is 645 g heavier than Atto.
Depth (front-to-back): 88mm EOS R6 Mark III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Credit card
85.6 × 54 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R6 Mark III
138 × 88 mm
Credit card
85.6 × 54 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Atto
9.6 × 7.2 mm · Compact
69 mm² area
12.4× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R6 Mark III
✓ more lensesCanon RF
105+
native lenses available
Atto: 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 R6 Mark III
AF points / zones
1053 vs 0 — higher is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Card slots
2 vs 0 — higher is better
Card types
Adds CFexpress Type B, SD UHS-II
ISO max (native)
64,000 vs 6,400 — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
AA filter
Only EOS R6 Mark III supports it
Reasons to choose
Atto
Stabilization modes
Adds MotionMaster, TiltGuard
Card types
Adds microSD (via Vision Dock)
Weight
54 g vs 699 g — lower is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Weather sealing — Both support weather sealing
- ✓Battery life (CIPA) — Both 640 shots
- ✓Wi-Fi — Both support wi-fi
- ✓Bluetooth — Both support bluetooth
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R6 Mark III
Pros
- ✓32.5MP full-frame sensor
- ✓7K RAW video & 4K 120p
- ✓40fps electronic burst with Pre-Continuous
- ✓8.5-stop IBIS
Cons
- –Single CFexpress Type B + SD slot
- –Smaller LCD than R5 II
- –LP-E6P required for full features
Atto
Pros
- ✓54g lightest in class
- ✓220 min with Vision Dock
- ✓128GB built-in + 600MB/s transfer
- ✓5-min pre-recording
Cons
- –No built-in screen
- –4K/60fps 16:9 only
- –10m waterproof (no case)
Decided which one is right for you?
Compare live prices for the EOS R6 Mark III and Atto at major authorized retailers.
Canon EOS R6 Mark III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, EOS R6 Mark III or Atto?
EOS R6 Mark III scores 8.0/10 versus 1.0/10 for Atto — 32.5MP — ample resolution for portraits.
Do the EOS R6 Mark III and Atto have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while Atto uses Electronic stabilization (MotionMaster + TiltGuard) (electronic).
What's the weight difference between the EOS R6 Mark III and Atto?
EOS R6 Mark III weighs 699 g and Atto weighs 54 g, so the Atto is 645 g lighter.
Do the EOS R6 Mark III and Atto record 4K video?
EOS R6 Mark III: 4K up to 120p. Atto: 4K up to 60p.
Are the EOS R6 Mark III and Atto weather sealed?
EOS R6 Mark III: Yes. Atto: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 640 shots for the Atto, giving the Atto the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Atto at $299. The Atto is $2,500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R6 Mark III vs Atto vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon and Xtra press materials.