Canon
EOS R3
Pro 24MP full-frame stacked-sensor body built for sports, news, wildlife, and high-speed hybrid capture.
$5,999
Launch priceReleased Sep 2021
Canon
EOS Ra
Astrophotography full-frame RF body with Ha-filter enhancement for nebula and deep-sky imaging.
$2,499
Launch priceReleased Nov 2019
EOS R3 is 1.8 years newer.
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Wins
EOS R3
Wins
EOS Ra
5 categories tied
Which would you choose?
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 25,600)
- AEOS R3 has higher RAW buffer depth (150 frames vs 60 frames)
- AEOS R3 has higher EVF resolution (5,760,000 vs 2,360,000)
- AEOS R3 has higher Burst (mechanical) (12 fps vs 6 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareEOS R3
150 × 143 × 87 mm
1015 g (2.24 lb / 35.80 oz)
Credit card
85.6 × 54 mm
for scale
EOS Ra
136 × 98 × 84 mm
660 g (1.46 lb / 23.28 oz)
EOS R3 is 14mm wider, 44mm taller, and 3mm thicker than EOS Ra.
EOS R3 is 355 g heavier than EOS Ra.
Depth (front-to-back): 87mm EOS R3 · 84mm EOS Ra
Sensor size, to scale
EOS R3
36 × 24 mm · Full Frame
864 mm² area
EOS Ra
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
EOS R3
✓ more lensesCanon RF
105+
native lenses available
EOS Ra
✓ 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
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 25,600 — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
EVF resolution
5,760,000 vs 2,360,000 — higher is better
Burst (mechanical)
12 fps vs 6 fps — higher is better
Reasons to choose
EOS Ra
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 135.8, 98.3, 84.4
Pre-Capture / Pre-Release
Only EOS Ra supports it
Weight
660 g vs 1015 g — lower is better
Resolution
30.3 MP vs 24.1 MP — higher is better
Battery life (CIPA)
640 shots vs 620 shots — higher is better
EVF magnification
0.78 × vs 0.76 × — 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 Ra
Pros
- ✓Ha-filter enhanced
- ✓30MP full-frame
- ✓RF mount
- ✓Built for astro
Cons
- –Niche use case
- –Not ideal for general photography
- –Discontinued
Decided which one is right for you?
Compare live prices for the EOS R3 and EOS Ra at major authorized retailers.
Canon EOS R3
Canon EOS Ra
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, EOS R3 or EOS Ra?
EOS R3 scores 9.0/10 versus 6.0/10 for EOS Ra — 6K video for oversampled 4K.
What's the resolution difference between the EOS R3 and EOS Ra?
EOS R3 is 24.1 MP and EOS Ra is 30.3 MP, so the EOS Ra captures more detail for cropping and large prints.
Do the EOS R3 and EOS Ra have in-body image stabilization?
EOS R3 has 8-stop in-body image stabilization, while EOS Ra has 6-stop in-body image stabilization.
Which shoots faster bursts — the EOS R3 or the EOS Ra?
EOS R3 reaches 30 fps electronic. EOS Ra reaches 15 fps electronic.
What's the weight difference between the EOS R3 and EOS Ra?
EOS R3 weighs 1015 g and EOS Ra weighs 660 g, so the EOS Ra is 355 g lighter.
Do the EOS R3 and EOS Ra record 4K video?
EOS R3: 6K RAW (max), 4K up to 120p. EOS Ra: 4K up to 60p.
Are the EOS R3 and EOS Ra weather sealed?
EOS R3: Yes. EOS Ra: Yes.
Which has better battery life?
Rated battery life is 620 shots (CIPA) for the EOS R3 and 640 shots for the EOS Ra, giving the EOS Ra the edge.
How much does each cost?
EOS R3 launched at $5,999 and EOS Ra at $2,499. The EOS Ra is $3,500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R3 vs EOS Ra vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.