OM System
OM-D E-M10 Mark III
Entry MFT with IBIS and approachable design for beginners.
$649
Launch priceReleased Aug 2017
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 9 years newer.
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Wins
OM-D E-M10 Mark III
Wins
PEN
4 categories tied
Which would you choose?
TL;DR — Key differences
- BPEN has higher IBIS effectiveness (5.5 stops vs 0 stops)
- AOM-D E-M10 Mark III has higher AF points / zones (1053 vs 121)
- BPEN has higher Burst (electronic) (30 fps vs 11 fps)
- AOM-D E-M10 Mark III has higher RAW buffer depth (60 frames vs 29 frames)
- AOM-D E-M10 Mark III has lower ISO min (native) (100 vs 200)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareOM-D E-M10 Mark III
134 × 91 × 72 mm
580 g (1.28 lb / 20.46 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 III is 8mm wider, 17mm taller, and 29mm thicker than PEN.
OM-D E-M10 Mark III is 187 g heavier than PEN.
Depth (front-to-back): 72mm OM-D E-M10 Mark III · 43mm PEN
Back view, to scale
Width × Height — same proportions as the front of the body.
OM-D E-M10 Mark III
134 × 91 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 III
134 × 72 mm
Credit card
85.6 × 54 mm
PEN
126 × 43 mm
Sensor size, to scale
OM-D E-M10 Mark III
17.3 × 13 mm · Micro Four Thirds
225 mm² area
PEN
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
OM-D E-M10 Mark III
✓ 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 III
AF low-light limit
-7 EV vs -3.5 EV — lower is better
Dimensions (W×H×D mm)
Adds 134, 91, 72
Card types
Adds SD UHS-II
AF points / zones
1053 vs 121 — higher is better
Subject recognition
Adds Animal, Bird, Vehicle
RAW buffer depth
60 frames vs 29 frames — higher is better
AA filter
Only OM-D E-M10 Mark III supports it
ISO min (native)
100 vs 200 — lower is better
Reasons to choose
PEN
IBIS effectiveness
5.5 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 125.8, 74.5, 43.3
Card types
Adds SD, SDHC, SDXC
Subject recognition
Adds Dog, Cat
Codecs
Adds MOV, MPEG-4 AVC
Burst (electronic)
30 fps vs 11 fps — higher is better
Animal / bird AF
Only PEN supports it
Pre-Capture / Pre-Release
Only PEN supports it
Both cameras share
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓Card slots — Both 1
- ✓EVF resolution — Both 2,360,000
- ✓EVF refresh rate — Both 120 Hz
- ✓Wi-Fi — Both support wi-fi
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-D E-M10 Mark III
Pros
- ✓IBIS at entry price
- ✓Compact
- ✓Easy menus
Cons
- –16MP
- –No weather sealing
- –Older
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 III and PEN at major authorized retailers.
OM System OM-D E-M10 Mark III
OM System PEN
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for travel, OM-D E-M10 Mark III or PEN?
PEN scores 7.5/10 versus 5.0/10 for OM-D E-M10 Mark III — 393g — ultralight for all-day carry.
What's the resolution difference between the OM-D E-M10 Mark III and PEN?
OM-D E-M10 Mark III is 16 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 III and PEN have in-body image stabilization?
OM-D E-M10 Mark III does not have IBIS, while PEN has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-D E-M10 Mark III or the PEN?
OM-D E-M10 Mark III reaches 11 fps electronic. PEN reaches 30 fps electronic.
What's the weight difference between the OM-D E-M10 Mark III and PEN?
OM-D E-M10 Mark III weighs 580 g and PEN weighs 393 g, so the PEN is 187 g lighter.
Do the OM-D E-M10 Mark III and PEN record 4K video?
OM-D E-M10 Mark III: 4K up to 60p. PEN: 4K up to 30p.
Are the OM-D E-M10 Mark III and PEN weather sealed?
OM-D E-M10 Mark III: No. PEN: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-D E-M10 Mark III and 410 shots for the PEN, giving the OM-D E-M10 Mark III the edge.
How much does each cost?
OM-D E-M10 Mark III launched at $649 and PEN at $1,000. The OM-D E-M10 Mark III is $351 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-D E-M10 Mark III 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.