Canon
EOS C400
RF-mount Super 35 cinema camera with 6K 60p, Cinema RAW Light, and built-in 9-stop ND.
$7,999
Launch priceReleased Sep 2024
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
EOS R6 Mark III is 1.2 years newer.
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Wins
EOS C400
Wins
EOS R6 Mark III
9 categories tied
Which would you choose?
TL;DR — Key differences
- BEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 200 Mbps)
- BEOS R6 Mark III has higher Resolution (32.5 MP vs 6.2 MP)
- BEOS R6 Mark III has higher ISO max (native) (64,000 vs 25,600)
- BEOS R6 Mark III has lower Weight (699 g vs 1450 g)
- BEOS R6 Mark III has higher Burst (electronic) (40 fps vs 20 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareEOS C400
162 × 138 × 130 mm
1450 g (3.20 lb / 51.15 oz)
Credit card
85.6 × 54 mm
for scale
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
EOS C400 is 24mm wider, 40mm taller, and 42mm thicker than EOS R6 Mark III.
EOS C400 is 751 g heavier than EOS R6 Mark III.
Depth (front-to-back): 130mm EOS C400 · 88mm EOS R6 Mark III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS C400
162 × 138 mm
Credit card
85.6 × 54 mm
EOS R6 Mark III
138 × 98 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS C400
162 × 130 mm
Credit card
85.6 × 54 mm
EOS R6 Mark III
138 × 88 mm
Sensor size, to scale
EOS C400
26.1 × 13.8 mm · APS-C
360 mm² area
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
2.4× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS C400
✓ more lensesCanon RF
105+
native lenses available
EOS R6 Mark III
✓ more lensesCanon RF
105+
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
EOS C400
Subject recognition
Adds Human, Animal, Bird…
Codecs
Adds Cinema RAW Light, XF-AVC, Apple ProRes
Dimensions (W×H×D mm)
Adds 162, 138, 130
EVF magnification
0.78 × vs 0.76 × — higher is better
Reasons to choose
EOS R6 Mark III
Subject recognition
Adds People, Dogs, Cats…
Codecs
Adds CRM, XF-HEVC S, XF-AVC S…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Max video bit rate
2600 Mbps vs 200 Mbps — higher is better
Resolution
32.5 MP vs 6.2 MP — higher is better
ISO max (native)
64,000 vs 25,600 — higher is better
Weight
699 g vs 1450 g — lower is better
AA filter
Only EOS R6 Mark III supports it
Both cameras share
- ✓ISO min (native) — Both 100
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS C400
Pros
- ✓6K 60p internal
- ✓Built-in 9-stop ND
- ✓Dual gain sensor
- ✓RF mount
Cons
- –Super 35 only
- –Premium price
- –Large media needs
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
Decided which one is right for you?
Compare live prices for the EOS C400 and EOS R6 Mark III at major authorized retailers.
Canon EOS C400
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 C400 or EOS R6 Mark III?
EOS R6 Mark III scores 8.0/10 versus 4.0/10 for EOS C400 — 32.5MP — ample resolution for portraits.
What's the resolution difference between the EOS C400 and EOS R6 Mark III?
EOS C400 is 6.2 MP and EOS R6 Mark III is 32.5 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS C400 and EOS R6 Mark III have in-body image stabilization?
EOS C400 has 7-stop in-body image stabilization, while EOS R6 Mark III has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS C400 or the EOS R6 Mark III?
EOS C400 reaches 20 fps electronic. EOS R6 Mark III reaches 40 fps electronic.
What's the weight difference between the EOS C400 and EOS R6 Mark III?
EOS C400 weighs 1450 g and EOS R6 Mark III weighs 699 g, so the EOS R6 Mark III is 751 g lighter.
Do the EOS C400 and EOS R6 Mark III record 4K video?
EOS C400: 6K 60p (max), 4K up to 120p. EOS R6 Mark III: 4K up to 120p.
Are the EOS C400 and EOS R6 Mark III weather sealed?
EOS C400: Yes. EOS R6 Mark III: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS C400 and 640 shots for the EOS R6 Mark III, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS C400 launched at $7,999 and EOS R6 Mark III at $2,799. The EOS R6 Mark III is $5,200 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS C400 vs EOS R6 Mark III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon press materials.