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
PEN
First OM SYSTEM-branded PEN: compact rangefinder-style Micro Four Thirds body with 20.4MP Live MOS, 5-axis IBIS, built-in EVF, IPX1 sealing, and in-camera computational modes.
$1,000
Launch priceReleased Sep 2026
PEN is 2.2 years newer.
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Wins
EOS R1
Wins
PEN
Which would you choose?
TL;DR — Key differences
- AEOS R1 has higher AF points / zones (1053 vs 121)
- AEOS R1 has higher ISO max (native) (102,400 vs 25,600)
- AEOS R1 has higher 4K max frame rate (120 fps vs 30 fps)
- AEOS R1 has higher EVF resolution (9,440,000 vs 2,360,000)
- AEOS R1 has higher Battery life (CIPA) (1330 shots vs 410 shots)
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
PEN
126 × 75 × 43 mm
393 g (0.87 lb / 13.86 oz)
EOS R1 is 32mm wider, 75mm taller, and 44mm thicker than PEN.
EOS R1 is 527 g heavier than PEN.
Depth (front-to-back): 87mm EOS R1 · 43mm PEN
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
PEN
126 × 75 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
PEN
126 × 43 mm
Sensor size, to scale
EOS R1
36 × 24 mm · Full Frame
864 mm² area
PEN
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
PEN
✓ 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
AF low-light limit
-7.5 EV vs -3.5 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
Card types
Adds CFexpress Type B, CFexpress Type B
AF points / zones
1053 vs 121 — higher is better
Codecs
Adds RAW, XF-HEVC S, XF-AVC S…
ISO max (native)
102,400 vs 25,600 — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Reasons to choose
PEN
Subject recognition
Adds Human, Dog, Cat
Dimensions (W×H×D mm)
Adds 125.8, 74.5, 43.3
Card types
Adds SD, SDHC, SDXC
Codecs
Adds MOV, MPEG-4 AVC
Weight
393 g vs 920 g — lower is better
EVF magnification
1.1 × vs 0.9 × — higher is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
- ✓Touchscreen — Both support touchscreen
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
PEN
Pros
- ✓393g rangefinder body with built-in 2.36M-dot EVF
- ✓First PEN with IPX1 dust/splash sealing
- ✓5-axis IBIS up to 5.5 stops + 121-point cross-type AF
- ✓Hi-Res, Live ND, Focus Stacking, HDR via CP button
- ✓4K / C4K video, vertical video, 3.5mm mic jack
Cons
- –Micro Four Thirds sensor vs APS-C/FF rivals
- –4K capped at 30p (C4K 24p only)
- –IPX1 is lighter sealing than OM-5 II / OM-3
- –Single SD slot, no headphone jack
Decided which one is right for you?
Compare live prices for the EOS R1 and PEN at major authorized retailers.
Canon EOS R1
OM System PEN
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, EOS R1 or PEN?
EOS R1 scores 9.0/10 versus 3.0/10 for PEN — 6K video for oversampled 4K.
What's the resolution difference between the EOS R1 and PEN?
EOS R1 is 24.2 MP and PEN is 20.4 MP, so the EOS R1 captures more detail for cropping and large prints.
Do the EOS R1 and PEN have in-body image stabilization?
EOS R1 has 8.5-stop in-body image stabilization, while PEN has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R1 or the PEN?
EOS R1 reaches 40 fps electronic. PEN reaches 30 fps electronic.
What's the weight difference between the EOS R1 and PEN?
EOS R1 weighs 920 g and PEN weighs 393 g, so the PEN is 527 g lighter.
Do the EOS R1 and PEN record 4K video?
EOS R1: 6K RAW (max), 4K up to 120p. PEN: 4K up to 30p.
Are the EOS R1 and PEN weather sealed?
EOS R1: Yes. PEN: Yes.
Which has better battery life?
Rated battery life is 1,330 shots (CIPA) for the EOS R1 and 410 shots for the PEN, giving the EOS R1 the edge.
How much does each cost?
EOS R1 launched at $6,299 and PEN at $1,000. The PEN is $5,299 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R1 vs PEN vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed September 2026.
Product images courtesy of Canon and OM System press materials.