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
Sony
Alpha 1 II
50MP stacked flagship with 30fps RAW, 8K video, and Sony's fastest hybrid performance.
$6,499
Released Nov 2024
Alpha 1 II is 3.2 years newer.
Wins
EOS R3
Wins
Alpha 1 II
4 categories tied
TL;DR — Key differences
- AEOS R3 has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- AEOS R3 has higher ISO max (native) (102,400 vs 32,000)
- BAlpha 1 II has higher Resolution (50.1 MP vs 24.1 MP)
- BAlpha 1 II has higher EVF refresh rate (240 Hz vs 120 Hz)
- BAlpha 1 II has higher EVF resolution (9,437,184 vs 5,760,000)
Key specs at a glance
Size and weight, to scale
EOS R3
150 × 143 × 87 mm
1015 g (2.24 lb / 35.80 oz)
Alpha 1 II
136 × 97 × 83 mm
743 g (1.64 lb / 26.21 oz)
EOS R3 is 14mm wider, 46mm taller, and 4mm thicker than Alpha 1 II.
EOS R3 is 272 g heavier than Alpha 1 II.
Depth (front-to-back): 87mm EOS R3 · 83mm Alpha 1 II
Sensor size, to scale
EOS R3
36 × 24 mm · Full Frame
864 mm² area
Alpha 1 II
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
EOS R3
Canon RF
105+
native lenses available
Alpha 1 II
✓ more lensesSony E
350+
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 -4 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 150, 142.6, 87.2
Max video bit rate
2600 Mbps vs 150 Mbps — higher is better
ISO max (native)
102,400 vs 32,000 — higher is better
Card types
Adds CFexpress Type B
Codecs
Adds RAW
AF points / zones
1053 vs 759 — higher is better
Reasons to choose
Alpha 1 II
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Resolution
50.1 MP vs 24.1 MP — higher is better
Pre-Capture / Pre-Release
Only Alpha 1 II supports it
Card types
Adds CFexpress Type A
EVF refresh rate
240 Hz vs 120 Hz — higher is better
EVF resolution
9,437,184 vs 5,760,000 — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (electronic) — Both 30 fps
- ✓4K max frame rate — Both 120 fps
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
Alpha 1 II
Pros
- ✓50MP stacked sensor
- ✓30fps blackout-free burst
- ✓8K 30p video
- ✓Best Sony AF
Cons
- –Very expensive
- –Complex menus
- –Large files
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, EOS R3 or Alpha 1 II?
Alpha 1 II scores 9.5/10 versus 5.0/10 for EOS R3 — 30fps burst captures fleeting moments.
What's the resolution difference between the EOS R3 and Alpha 1 II?
EOS R3 is 24.1 MP and Alpha 1 II is 50.1 MP, so the Alpha 1 II captures more detail for cropping and large prints.
Do the EOS R3 and Alpha 1 II have in-body image stabilization?
EOS R3 has 8-stop in-body image stabilization, while alpha 1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R3 or the Alpha 1 II?
EOS R3 reaches 30 fps electronic. Alpha 1 II reaches 30 fps electronic.
What's the weight difference between the EOS R3 and Alpha 1 II?
EOS R3 weighs 1015 g and Alpha 1 II weighs 743 g, so the Alpha 1 II is 272 g lighter.
Do the EOS R3 and Alpha 1 II record 4K video?
EOS R3: 6K RAW (max), 4K up to 120p. Alpha 1 II: 8K (max), 4K up to 120p.
Are the EOS R3 and Alpha 1 II weather sealed?
EOS R3: Yes. Alpha 1 II: Yes.
Which has better battery life?
Rated battery life is 620 shots (CIPA) for the EOS R3 and 520 shots for the Alpha 1 II, giving the EOS R3 the edge.
How much does each cost?
EOS R3 launched at $5,999 and Alpha 1 II at $6,499. The EOS R3 is $500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.