OM System
OM-3
Retro-styled MFT body with modern AF and creator-friendly design.
$1,699
Released Jan 2025
OM System
OM-D E-M10 Mark IV
Entry MFT body with IBIS and approachable controls.
$699
Released Aug 2020
OM-3 is 4.4 years newer.
Wins
OM-3
Wins
OM-D E-M10 Mark IV
6 categories tied
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 ISO max (native) (102,400 vs 25,600)
- AOM-3 has lower ISO min (native) (80 vs 200)
- AOM-3 has higher 4K max frame rate (60 fps vs 30 fps)
Key specs at a glance
Size and weight, to scale
OM-3
139 × 89 × 46 mm
496 g (1.09 lb / 17.50 oz)
OM-D E-M10 Mark IV
122 × 85 × 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 4mm taller.
OM-3 is 113 g heavier than OM-D E-M10 Mark IV.
Depth (front-to-back): 46mm OM-3 · 49mm OM-D E-M10 Mark IV
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
ISO max (native)
102,400 vs 25,600 — higher is better
ISO min (native)
80 vs 200 — lower is better
Animal / bird AF
Only OM-3 supports it
Pre-Capture / Pre-Release
Only OM-3 supports it
Reasons to choose
OM-D E-M10 Mark IV
Subject recognition
Adds Face, Eye
Dimensions (W×H×D mm)
Adds 121.7, 84.6, 49
Weight
383 g vs 496 g — lower is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Max video bit rate — Both 150 Mbps
- ✓In-body stabilization — Both support in-body stabilization
- ✓Battery life (CIPA) — Both 640 shots
- ✓Card slots — Both 1
- ✓EVF resolution — Both 2,360,000
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
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 496 g and OM-D E-M10 Mark IV weighs 383 g, so the OM-D E-M10 Mark IV is 113 g lighter.
Do the OM-3 and OM-D E-M10 Mark IV record 4K video?
OM-3: 4K up to 60p. OM-D E-M10 Mark IV: 4K up to 30p.
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 640 shots for the OM-D E-M10 Mark IV, giving the OM-D E-M10 Mark IV 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.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.