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
Panasonic
Lumix GX85
Compact MFT rangefinder body with 16MP sensor, 5-axis stabilization, and 4K Photo features.
$799
Launch priceReleased Apr 2016
PEN is 10.4 years newer.
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Wins
PEN
Wins
Lumix GX85
5 categories tied
Which would you choose?
TL;DR — Key differences
- APEN has higher Burst (electronic) (30 fps vs 10 fps)
- APEN has higher AF points / zones (121 vs 49)
- APEN has higher Max video bit rate (240 Mbps vs 100 Mbps)
- APEN has higher RAW buffer depth (29 frames vs 13 frames)
- APEN has higher EVF refresh rate (120 Hz vs 60 Hz)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
PEN
126 × 75 × 43 mm
393 g (0.87 lb / 13.86 oz)
Credit card
85.6 × 54 mm
for scale
Lumix GX85
122 × 71 × 44 mm
426 g (0.94 lb / 15.03 oz)
PEN is 1mm thinner than Lumix GX85 but it is also 4mm wider and 4mm taller.
PEN is 33 g lighter than Lumix GX85.
Depth (front-to-back): 43mm PEN · 44mm Lumix GX85
Back view, to scale
Width × Height — same proportions as the front of the body.
PEN
126 × 75 mm
Credit card
85.6 × 54 mm
Lumix GX85
122 × 71 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
PEN
126 × 43 mm
Credit card
85.6 × 54 mm
Lumix GX85
122 × 44 mm
Sensor size, to scale
PEN
17.4 × 13 mm · Compact / large-type
226 mm² area
Lumix GX85
17.3 × 13 mm · Micro Four Thirds
225 mm² area
Lens ecosystem
Native lens selection
PEN
✓ more lensesMicro Four Thirds
130+
native lenses available
Lumix GX85
✓ 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
PEN
Dimensions (W×H×D mm)
Adds 125.8, 74.5, 43.3
Card types
Adds SD, SDHC, SDXC
Subject recognition
Adds Dog, Cat
Burst (electronic)
30 fps vs 10 fps — higher is better
Codecs
Adds MOV, MPEG-4 AVC
AF points / zones
121 vs 49 — higher is better
Max video bit rate
240 Mbps vs 100 Mbps — higher is better
RAW buffer depth
29 frames vs 13 frames — higher is better
Reasons to choose
Lumix GX85
Dimensions (W×H×D mm)
Adds 122, 70.6, 43.9
Card types
Adds SD UHS-I
Subject recognition
Adds Face, Eye, Animal
Codecs
Adds MP4, AVCHD
AF low-light limit
-4 EV vs -3.5 EV — lower is better
Burst (mechanical)
8 fps vs 5 fps — higher is better
EVF resolution
2,760,000 vs 2,360,000 — higher is better
Both cameras share
- ✓ISO min (native) — Both 200
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓4K max frame rate — Both 30 fps
- ✓1080p max frame rate — Both 60 fps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
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
Lumix GX85
Pros
- ✓Compact body
- ✓IBIS
- ✓4K video
- ✓Great used value
Cons
- –16MP sensor
- –No weather sealing
- –Older AF
Decided which one is right for you?
Compare live prices for the PEN and Lumix GX85 at major authorized retailers.
OM System PEN
Panasonic Lumix GX85
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, PEN or Lumix GX85?
PEN scores 6.0/10 versus 3.0/10 for Lumix GX85 — 30fps burst — pro-level action capture.
What's the resolution difference between the PEN and Lumix GX85?
PEN is 20.4 MP and Lumix GX85 is 16 MP, so the PEN captures more detail for cropping and large prints.
Do the PEN and Lumix GX85 have in-body image stabilization?
PEN has 5.5-stop in-body image stabilization, while Lumix GX85 has 4-stop in-body image stabilization.
Which shoots faster bursts — the PEN or the Lumix GX85?
PEN reaches 30 fps electronic. Lumix GX85 reaches 10 fps electronic.
What's the weight difference between the PEN and Lumix GX85?
PEN weighs 393 g and Lumix GX85 weighs 426 g, so the PEN is 33 g lighter.
Do the PEN and Lumix GX85 record 4K video?
PEN: 4K up to 30p. Lumix GX85: 4K up to 30p.
Are the PEN and Lumix GX85 weather sealed?
PEN: Yes. Lumix GX85: No.
Which has better battery life?
Rated battery life is 410 shots (CIPA) for the PEN and 290 shots for the Lumix GX85, giving the PEN the edge.
How much does each cost?
PEN launched at $1,000 and Lumix GX85 at $799. The Lumix GX85 is $201 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way PEN vs Lumix GX85 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed October 2026.
Product images courtesy of OM System and Panasonic press materials.