OM System
OM-3
Retro-styled MFT body with modern AF and creator-friendly design.
$1,699
Launch priceReleased Jan 2025
OM System
OM-D E-M10 Mark IV
Entry MFT body with IBIS and approachable controls.
$699
Launch priceReleased Aug 2020
OM-3 is 4.4 years newer.
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Wins
OM-3
Wins
OM-D E-M10 Mark IV
6 categories tied
Which would you choose?
TL;DR — Key differences
- AOM-3 has higher AF points / zones (1053 vs 121)
- AOM-3 has higher Burst (electronic) (120 fps vs 15 fps)
- AOM-3 has higher Max video bit rate (205 Mbps vs 102 Mbps)
- AOM-3 has higher 4K max frame rate (59.94 fps vs 29.97 fps)
- AOM-3 has higher EVF magnification (1.23 × vs 0.67 ×)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
OM-3
139 × 89 × 46 mm
413 g (0.91 lb / 14.57 oz)
Credit card
85.6 × 54 mm
for scale
OM-D E-M10 Mark IV
122 × 84 × 49 mm
383 g (0.84 lb / 13.51 oz)
OM-3 is 3mm thinner than OM-D E-M10 Mark IV but it is also 18mm wider and 5mm taller.
OM-3 is 30 g heavier than OM-D E-M10 Mark IV.
Depth (front-to-back): 46mm OM-3 · 49mm OM-D E-M10 Mark IV
Back view, to scale
Width × Height — same proportions as the front of the body.
OM-3
139 × 89 mm
Credit card
85.6 × 54 mm
OM-D E-M10 Mark IV
122 × 84 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
OM-3
139 × 46 mm
Credit card
85.6 × 54 mm
OM-D E-M10 Mark IV
122 × 49 mm
Sensor size, to scale
OM-3
17.4 × 13 mm · Compact / large-type
226 mm² area
OM-D E-M10 Mark IV
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
OM-3
✓ more lensesMicro Four Thirds
130+
native lenses available
OM-D E-M10 Mark IV
✓ 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-3
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 139.3, 88.9, 45.8
AF points / zones
1053 vs 121 — higher is better
Burst (electronic)
120 fps vs 15 fps — higher is better
Max video bit rate
205 Mbps vs 102 Mbps — higher is better
Animal / bird AF
Only OM-3 supports it
Pre-Capture / Pre-Release
Only OM-3 supports it
4K max frame rate
59.94 fps vs 29.97 fps — higher is better
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 10 fps — higher is better
Weight
383 g vs 413 g — lower is better
Both cameras share
- ✓ISO min (native) — Both 200
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓1080p max frame rate — Both 59.94 fps
- ✓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-3
Pros
- ✓Retro design
- ✓Modern AF
- ✓Compact
Cons
- –MFT sensor
- –Premium for MFT
- –Smaller lens selection
OM-D E-M10 Mark IV
Pros
- ✓IBIS at entry price
- ✓Compact
- ✓Easy to use
Cons
- –Older sensor
- –No weather sealing
- –MFT limits
Decided which one is right for you?
Compare live prices for the OM-3 and OM-D E-M10 Mark IV at major authorized retailers.
OM System OM-3
OM System OM-D E-M10 Mark IV
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, OM-3 or OM-D E-M10 Mark IV?
OM-3 scores 8.5/10 versus 2.5/10 for OM-D E-M10 Mark IV — 120fps burst — pro-level action capture.
What's the resolution difference between the OM-3 and OM-D E-M10 Mark IV?
OM-3 is 20.4 MP and OM-D E-M10 Mark IV is 20.3 MP, so the OM-3 captures more detail for cropping and large prints.
Do the OM-3 and OM-D E-M10 Mark IV have in-body image stabilization?
OM-3 has 6.5-stop in-body image stabilization, while OM-D E-M10 Mark IV has 4.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-3 or the OM-D E-M10 Mark IV?
OM-3 reaches 120 fps electronic. OM-D E-M10 Mark IV reaches 15 fps electronic.
What's the weight difference between the OM-3 and OM-D E-M10 Mark IV?
OM-3 weighs 413 g and OM-D E-M10 Mark IV weighs 383 g, so the OM-D E-M10 Mark IV is 30 g lighter.
Do the OM-3 and OM-D E-M10 Mark IV record 4K video?
OM-3: 4K up to 59.94p. OM-D E-M10 Mark IV: 4K up to 29.97p.
Are the OM-3 and OM-D E-M10 Mark IV weather sealed?
OM-3: Yes. OM-D E-M10 Mark IV: No.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-3 and 360 shots for the OM-D E-M10 Mark IV, giving the OM-3 the edge.
How much does each cost?
OM-3 launched at $1,699 and OM-D E-M10 Mark IV at $699. The OM-D E-M10 Mark IV is $1,000 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-3 vs OM-D E-M10 Mark IV vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of OM System press materials.