Canon
EOS R
Canon’s first full-frame RF mirrorless — launched the RF mount ecosystem.
$2,299
Released Sep 2018
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
Released Nov 2025
EOS R6 Mark III is 7.2 years newer.
Wins
EOS R
Wins
EOS R6 Mark III
4 categories tied
TL;DR — Key differences
- BEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- AEOS R has higher AF points / zones (5655 vs 1053)
- BEOS R6 Mark III has higher Burst (electronic) (40 fps vs 8 fps)
- BEOS R6 Mark III has higher 4K max frame rate (120 fps vs 30 fps)
- BEOS R6 Mark III has higher RAW buffer depth (150 frames vs 60 frames)
Key specs at a glance
Size and weight, to scale
EOS R
138 × 98 × 88 mm
720 g (1.59 lb / 25.40 oz)
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
EOS R and EOS R6 Mark III share virtually identical body dimensions.
EOS R is 21 g heavier than EOS R6 Mark III.
Depth (front-to-back): 88mm EOS R · 88mm EOS R6 Mark III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R
138 × 98 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 R
138 × 88 mm
EOS R6 Mark III
138 × 88 mm
Sensor size, to scale
EOS R
36 × 24 mm · Full Frame
864 mm² area
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Lens ecosystem
Native lens selection
EOS R
✓ 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 R
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 138, 98, 88
AF points / zones
5655 vs 1053 — higher is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Reasons to choose
EOS R6 Mark III
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Max video bit rate
2600 Mbps vs 150 Mbps — higher is better
Burst (electronic)
40 fps vs 8 fps — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S…
4K max frame rate
120 fps vs 30 fps — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
AF low-light limit
-6.5 EV vs -6 EV — lower is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R
Pros
- ✓First Canon RF body
- ✓Dual Pixel AF
- ✓Fully articulating screen
Cons
- –No IBIS
- –Single card slot
- –Superseded by R6/R8
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
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R or EOS R6 Mark III?
EOS R6 Mark III scores 8.5/10 versus 6.0/10 for EOS R — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R and EOS R6 Mark III?
EOS R is 30.3 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 R and EOS R6 Mark III have in-body image stabilization?
EOS R has 6-stop in-body image stabilization, while eOS R6 Mark III has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R or the EOS R6 Mark III?
EOS R reaches 8 fps electronic. EOS R6 Mark III reaches 40 fps electronic.
What's the weight difference between the EOS R and EOS R6 Mark III?
EOS R weighs 720 g and EOS R6 Mark III weighs 699 g, so the EOS R6 Mark III is 21 g lighter.
Do the EOS R and EOS R6 Mark III record 4K video?
EOS R: 4K up to 30p. EOS R6 Mark III: 4K up to 120p.
Are the EOS R and EOS R6 Mark III weather sealed?
EOS R: Yes. EOS R6 Mark III: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R and 640 shots for the EOS R6 Mark III, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R launched at $2,299 and EOS R6 Mark III at $2,799. The EOS R is $500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon press materials.