Canon
EOS R3
Pro 24MP full-frame stacked-sensor body built for sports, news, wildlife, and high-speed hybrid capture.
$5,999
Released Sep 2021
Canon
EOS R5 Mark II
45MP stacked-sensor powerhouse with 8K 60p RAW internal and 30fps burst.
$4,299
Released Jul 2024
EOS R5 Mark II is 2.8 years newer.
Wins
EOS R3
Wins
EOS R5 Mark II
11 categories tied
TL;DR — Key differences
- BEOS R5 Mark II has higher RAW buffer depth (600 frames vs 150 frames)
- AEOS R3 has higher ISO max (native) (102,400 vs 51,200)
- AEOS R3 has higher Battery life (CIPA) (620 shots vs 320 shots)
- BEOS R5 Mark II has higher Resolution (45 MP vs 24.1 MP)
- BEOS R5 Mark II has lower Weight (746 g vs 1015 g)
Key specs at a glance
Size and weight, to scale
EOS R3
150 × 143 × 87 mm
1015 g (2.24 lb / 35.80 oz)
EOS R5 Mark II
138 × 101 × 94 mm
746 g (1.64 lb / 26.31 oz)
EOS R3 is 6mm thinner than EOS R5 Mark II but it is also 12mm wider and 41mm taller.
EOS R3 is 269 g heavier than EOS R5 Mark II.
Depth (front-to-back): 87mm EOS R3 · 94mm EOS R5 Mark II
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R3
150 × 143 mm
EOS R5 Mark II
138 × 101 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R3
150 × 87 mm
EOS R5 Mark II
138 × 94 mm
Sensor size, to scale
EOS R3
36 × 24 mm · Full Frame
864 mm² area
EOS R5 Mark II
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
EOS R3
✓ more lensesCanon RF
105+
native lenses available
EOS R5 Mark II
✓ 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 R3
AF low-light limit
-7.5 EV vs -6.5 EV — lower is better
Dimensions (W×H×D mm)
Adds 150, 142.6, 87.2
ISO max (native)
102,400 vs 51,200 — higher is better
Battery life (CIPA)
620 shots vs 320 shots — higher is better
Subject recognition
Adds Motorsport vehicles
Reasons to choose
EOS R5 Mark II
Dimensions (W×H×D mm)
Adds 138.4, 101.2, 93.5
RAW buffer depth
600 frames vs 150 frames — higher is better
Subject recognition
Adds Horses, Cars, Motorbikes…
Pre-Capture / Pre-Release
Only EOS R5 Mark II supports it
Resolution
45 MP vs 24.1 MP — higher is better
Codecs
Adds XF-HEVC S, XF-AVC S
Weight
746 g vs 1015 g — lower is better
IBIS effectiveness
8.5 stops vs 8 stops — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓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
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R3
Pros
- ✓30fps electronic burst from a stacked full-frame sensor
- ✓Exceptional low-light AF down to -7.5 EV
- ✓Integrated pro body with large LP-E19 battery
- ✓6K RAW video and 4K 120p
- ✓Rugged weather-sealed construction
Cons
- –24MP resolution trails higher-detail rivals
- –Large integrated-grip body
- –Expensive compared with enthusiast full-frame bodies
EOS R5 Mark II
Pros
- ✓45MP stacked CMOS — speed and resolution
- ✓8K 60p RAW internal recording
- ✓30fps electronic burst at full 45MP
- ✓5.76M dot EVF
Cons
- –Premium $4,299 price
- –Short battery life (320 CIPA shots)
- –Body heat in extended 8K sessions
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R3 or EOS R5 Mark II?
EOS R5 Mark II scores 9.5/10 versus 7.0/10 for EOS R3 — 30fps burst — pro-level action capture.
What's the resolution difference between the EOS R3 and EOS R5 Mark II?
EOS R3 is 24.1 MP and EOS R5 Mark II is 45 MP, so the EOS R5 Mark II captures more detail for cropping and large prints.
Do the EOS R3 and EOS R5 Mark II have in-body image stabilization?
EOS R3 has 8-stop in-body image stabilization, while eOS R5 Mark II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R3 or the EOS R5 Mark II?
EOS R3 reaches 30 fps electronic. EOS R5 Mark II reaches 30 fps electronic.
What's the weight difference between the EOS R3 and EOS R5 Mark II?
EOS R3 weighs 1015 g and EOS R5 Mark II weighs 746 g, so the EOS R5 Mark II is 269 g lighter.
Do the EOS R3 and EOS R5 Mark II record 4K video?
EOS R3: 6K RAW (max), 4K up to 120p. EOS R5 Mark II: 8K RAW (max), 4K up to 120p.
Are the EOS R3 and EOS R5 Mark II weather sealed?
EOS R3: Yes. EOS R5 Mark II: Yes.
Which has better battery life?
Rated battery life is 620 shots (CIPA) for the EOS R3 and 320 shots for the EOS R5 Mark II, giving the EOS R3 the edge.
How much does each cost?
EOS R3 launched at $5,999 and EOS R5 Mark II at $4,299. The EOS R5 Mark II is $1,700 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon press materials.