Canon
EOS-1D X Mark III
Canon flagship DSLR for sports and news with 20fps and legendary reliability.
$6,499
Released Feb 2020
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
EOS R1 is 4.4 years newer.
Wins
EOS-1D X Mark III
Wins
EOS R1
4 categories tied
TL;DR — Key differences
- BEOS R1 has higher AF points / zones (1053 vs 191)
- BEOS R1 has higher Burst (electronic) (40 fps vs 20 fps)
- BEOS R1 has higher 4K max frame rate (120 fps vs 60 fps)
- BEOS R1 has higher EVF resolution (9,440,000 vs 5,760,000)
- AEOS-1D X Mark III has lower Weight (720 g vs 1115 g)
Key specs at a glance
Size and weight, to scale
EOS-1D X Mark III
138 × 98 × 88 mm
720 g (1.59 lb / 25.40 oz)
EOS R1
158 × 150 × 87 mm
1115 g (2.46 lb / 39.33 oz)
EOS-1D X Mark III is 20mm narrower and 52mm shorter than EOS R1 but it is also 1mm thicker.
EOS-1D X Mark III is 395 g lighter than EOS R1.
Depth (front-to-back): 88mm EOS-1D X Mark III · 87mm EOS R1
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS-1D X Mark III
138 × 98 mm
EOS R1
158 × 150 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS-1D X Mark III
138 × 88 mm
EOS R1
158 × 87 mm
Sensor size, to scale
EOS-1D X Mark III
36 × 24 mm · Full Frame
864 mm² area
EOS R1
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
EOS-1D X Mark III
✓ more lensesCanon EF
300+
native lenses available
EOS R1
Canon 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-1D X Mark III
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 138, 98, 88
Card types
Adds SD UHS-II
Weight
720 g vs 1115 g — lower is better
Burst (mechanical)
16 fps vs 12 fps — higher is better
Reasons to choose
EOS R1
AF low-light limit
-7.5 EV vs -4 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
AF points / zones
1053 vs 191 — higher is better
Animal / bird AF
Only EOS R1 supports it
Burst (electronic)
40 fps vs 20 fps — higher is better
4K max frame rate
120 fps vs 60 fps — higher is better
Codecs
Adds XF-HEVC S, XF-AVC S
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓ISO max (native) — Both 102,400
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS-1D X Mark III
Pros
- ✓20fps DSLR
- ✓Pro build
- ✓Dual CFexpress
- ✓Excellent AF
Cons
- –DSLR platform
- –20MP
- –Very heavy
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
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, EOS-1D X Mark III or EOS R1?
EOS-1D X Mark III scores 10.0/10 versus 6.5/10 for EOS R1 — 20fps burst captures fleeting moments.
What's the resolution difference between the EOS-1D X Mark III and EOS R1?
EOS-1D X Mark III is 20.1 MP and EOS R1 is 24.2 MP, so the EOS R1 captures more detail for cropping and large prints.
Do the EOS-1D X Mark III and EOS R1 have in-body image stabilization?
EOS-1D X Mark III has 8-stop in-body image stabilization, while eOS R1 has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS-1D X Mark III or the EOS R1?
EOS-1D X Mark III reaches 20 fps electronic. EOS R1 reaches 40 fps electronic.
What's the weight difference between the EOS-1D X Mark III and EOS R1?
EOS-1D X Mark III weighs 720 g and EOS R1 weighs 1115 g, so the EOS-1D X Mark III is 395 g lighter.
Do the EOS-1D X Mark III and EOS R1 record 4K video?
EOS-1D X Mark III: 4K up to 60p. EOS R1: 6K RAW (max), 4K up to 120p.
Are the EOS-1D X Mark III and EOS R1 weather sealed?
EOS-1D X Mark III: Yes. EOS R1: Yes.
How much does each cost?
EOS-1D X Mark III launched at $6,499 and EOS R1 at $6,299. The EOS R1 is $200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon press materials.