OM System
OM-D E-M10 Mark IV
Entry MFT body with IBIS and approachable controls.
$699
Launch priceReleased Aug 2020
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 6 years newer.
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Wins
OM-D E-M10 Mark IV
Wins
PEN
6 categories tied
Which would you choose?
TL;DR — Key differences
- AOM-D E-M10 Mark IV has higher Burst (mechanical) (15 fps vs 5 fps)
- BPEN has higher Max video bit rate (240 Mbps vs 102 Mbps)
- BPEN has higher Burst (electronic) (30 fps vs 15 fps)
- BPEN has higher EVF magnification (1.1 × vs 0.67 ×)
- AOM-D E-M10 Mark IV has higher RAW buffer depth (42 frames vs 29 frames)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
OM-D E-M10 Mark IV
122 × 84 × 49 mm
383 g (0.84 lb / 13.51 oz)
Credit card
85.6 × 54 mm
for scale
PEN
126 × 75 × 43 mm
393 g (0.87 lb / 13.86 oz)
OM-D E-M10 Mark IV is 4mm narrower than PEN but it is also 10mm taller and 6mm thicker.
OM-D E-M10 Mark IV is 10 g lighter than PEN.
Depth (front-to-back): 49mm OM-D E-M10 Mark IV · 43mm PEN
Back view, to scale
Width × Height — same proportions as the front of the body.
OM-D E-M10 Mark IV
122 × 84 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.
OM-D E-M10 Mark IV
122 × 49 mm
Credit card
85.6 × 54 mm
PEN
126 × 43 mm
Sensor size, to scale
OM-D E-M10 Mark IV
17.4 × 13 mm · Compact / large-type
226 mm² area
PEN
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
OM-D E-M10 Mark IV
✓ more lensesMicro Four Thirds
130+
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
OM-D E-M10 Mark IV
Subject recognition
Adds Face, Eye
Dimensions (W×H×D mm)
Adds 121.7, 84.4, 49
Burst (mechanical)
15 fps vs 5 fps — higher is better
RAW buffer depth
42 frames vs 29 frames — higher is better
Weight
383 g vs 393 g — lower is better
Reasons to choose
PEN
Subject recognition
Adds Human, Dog, Cat
Dimensions (W×H×D mm)
Adds 125.8, 74.5, 43.3
Max video bit rate
240 Mbps vs 102 Mbps — higher is better
Animal / bird AF
Only PEN supports it
Burst (electronic)
30 fps vs 15 fps — higher is better
Pre-Capture / Pre-Release
Only PEN supports it
Weather sealing
Only PEN supports it
Microphone jack (3.5mm)
Only PEN supports it
Both cameras share
- ✓ISO min (native) — Both 200
- ✓ISO max (native) — Both 25,600
- ✓AF points / zones — Both 121
- ✓Eye AF — Both support eye af
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Card slots — Both 1
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-D E-M10 Mark IV
Pros
- ✓IBIS at entry price
- ✓Compact
- ✓Easy to use
Cons
- –Older sensor
- –No weather sealing
- –MFT limits
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 OM-D E-M10 Mark IV and PEN at major authorized retailers.
OM System OM-D E-M10 Mark IV
OM System PEN
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, OM-D E-M10 Mark IV or PEN?
PEN scores 5.5/10 versus 1.5/10 for OM-D E-M10 Mark IV — 30fps burst captures fleeting moments.
What's the resolution difference between the OM-D E-M10 Mark IV and PEN?
OM-D E-M10 Mark IV is 20.3 MP and PEN is 20.4 MP, so the PEN captures more detail for cropping and large prints.
Do the OM-D E-M10 Mark IV and PEN have in-body image stabilization?
OM-D E-M10 Mark IV has 4.5-stop in-body image stabilization, while PEN has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-D E-M10 Mark IV or the PEN?
OM-D E-M10 Mark IV reaches 15 fps electronic. PEN reaches 30 fps electronic.
What's the weight difference between the OM-D E-M10 Mark IV and PEN?
OM-D E-M10 Mark IV weighs 383 g and PEN weighs 393 g, so the OM-D E-M10 Mark IV is 10 g lighter.
Do the OM-D E-M10 Mark IV and PEN record 4K video?
OM-D E-M10 Mark IV: 4K up to 29.97p. PEN: 4K up to 30p.
Are the OM-D E-M10 Mark IV and PEN weather sealed?
OM-D E-M10 Mark IV: No. PEN: Yes.
Which has better battery life?
Rated battery life is 360 shots (CIPA) for the OM-D E-M10 Mark IV and 410 shots for the PEN, giving the PEN the edge.
How much does each cost?
OM-D E-M10 Mark IV launched at $699 and PEN at $1,000. The OM-D E-M10 Mark IV is $301 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-D E-M10 Mark IV vs PEN vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed September 2026.
Product images courtesy of OM System press materials.