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
Launch priceReleased Jul 2024
OM System
OM-3 ASTRO
Astrophotography-focused OM-3 variant with 20.4MP stacked sensor, H-alpha-friendly filter tuning, IP53 sealing, and 7.5-stop Sync IS.
$2,499
Launch priceReleased Jul 2025
OM-3 ASTRO is 11 months newer.
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Wins
EOS R1
Wins
OM-3 ASTRO
3 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R1 has higher EVF resolution (9,440,000 vs 2,360,000)
- BOM-3 ASTRO has higher Burst (electronic) (120 fps vs 40 fps)
- AEOS R1 has higher Battery life (CIPA) (1330 shots vs 640 shots)
- AEOS R1 has higher 4K max frame rate (120 fps vs 60 fps)
- AEOS R1 has higher Card slots (2 vs 1)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R1
158 × 150 × 87 mm
920 g (2.03 lb / 32.45 oz)
Credit card
85.6 × 54 mm
for scale
OM-3 ASTRO
139 × 89 × 46 mm
496 g (1.09 lb / 17.50 oz)
EOS R1 is 18mm wider, 61mm taller, and 42mm thicker than OM-3 ASTRO.
EOS R1 is 424 g heavier than OM-3 ASTRO.
Depth (front-to-back): 87mm EOS R1 · 46mm OM-3 ASTRO
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R1
158 × 150 mm
Credit card
85.6 × 54 mm
OM-3 ASTRO
139 × 89 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R1
158 × 87 mm
Credit card
85.6 × 54 mm
OM-3 ASTRO
139 × 46 mm
Sensor size, to scale
EOS R1
36 × 24 mm · Full Frame
864 mm² area
OM-3 ASTRO
17.4 × 13 mm · Compact / large-type
226 mm² area
3.8× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R1
Canon RF
105+
native lenses available
OM-3 ASTRO
✓ more lensesMicro Four Thirds
130+
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 R1
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
Card types
Adds CFexpress Type B, CFexpress Type B
EVF resolution
9,440,000 vs 2,360,000 — higher is better
Subject recognition
Adds Dogs, Cats, Horses…
Codecs
Adds RAW, XF-HEVC S, XF-AVC S
Battery life (CIPA)
1330 shots vs 640 shots — higher is better
AA filter
Only EOS R1 supports it
4K max frame rate
120 fps vs 60 fps — higher is better
Reasons to choose
OM-3 ASTRO
Dimensions (W×H×D mm)
Adds 139.3, 88.9, 45.8
Card types
Adds SD UHS-II, SD UHS-I
Burst (electronic)
120 fps vs 40 fps — higher is better
AF low-light limit
-8 EV vs -7.5 EV — lower is better
Subject recognition
Adds Animals, Motorsports, Airplanes
Weight
496 g vs 920 g — lower is better
Codecs
Adds MOV
ISO min (native)
80 vs 100 — lower is better
Both cameras share
- ✓ISO max (native) — Both 102,400
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
Pros & cons at a glance
Editorially curated highlights and trade-offs.
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
OM-3 ASTRO
Pros
- ✓Astro-tuned sensor filter
- ✓20.4MP stacked BSI Live MOS
- ✓IP53 weather sealing
- ✓7.5-stop Sync IS
Cons
- –Specialized astro variant
- –Micro Four Thirds sensor
- –Premium price
Decided which one is right for you?
Compare live prices for the EOS R1 and OM-3 ASTRO at major authorized retailers.
Canon EOS R1
OM System OM-3 ASTRO
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, EOS R1 or OM-3 ASTRO?
EOS R1 scores 7.0/10 versus 2.5/10 for OM-3 ASTRO — Full-frame sensor — wider dynamic range.
What's the resolution difference between the EOS R1 and OM-3 ASTRO?
EOS R1 is 24.2 MP and OM-3 ASTRO is 20.4 MP, so the EOS R1 captures more detail for cropping and large prints.
Do the EOS R1 and OM-3 ASTRO have in-body image stabilization?
EOS R1 has 8.5-stop in-body image stabilization, while OM-3 ASTRO has 6.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R1 or the OM-3 ASTRO?
EOS R1 reaches 40 fps electronic. OM-3 ASTRO reaches 120 fps electronic.
What's the weight difference between the EOS R1 and OM-3 ASTRO?
EOS R1 weighs 920 g and OM-3 ASTRO weighs 496 g, so the OM-3 ASTRO is 424 g lighter.
Do the EOS R1 and OM-3 ASTRO record 4K video?
EOS R1: 6K RAW (max), 4K up to 120p. OM-3 ASTRO: 4K up to 60p.
Are the EOS R1 and OM-3 ASTRO weather sealed?
EOS R1: Yes. OM-3 ASTRO: Yes.
Which has better battery life?
Rated battery life is 1,330 shots (CIPA) for the EOS R1 and 640 shots for the OM-3 ASTRO, giving the EOS R1 the edge.
How much does each cost?
EOS R1 launched at $6,299 and OM-3 ASTRO at $2,499. The OM-3 ASTRO is $3,800 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R1 vs OM-3 ASTRO vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Canon and OM System press materials.