OM System
OM-1
First OM System flagship with cross-type AF and 50fps burst.
$2,199
Released Feb 2022
OM System
OM-5 Mark II
Compact IP53 Micro Four Thirds body with 20MP Live MOS sensor, 7.5-stop Sync IS, 30fps burst, 4K video, and USB-C charging.
$1,199
Released Jun 2025
OM-5 Mark II is 3.3 years newer.
Wins
OM-1
Wins
OM-5 Mark II
10 categories tied
TL;DR — Key differences
- AOM-1 has higher AF points / zones (1053 vs 121)
- AOM-1 has higher Burst (electronic) (120 fps vs 30 fps)
- AOM-1 has higher EVF resolution (5,760,000 vs 2,360,000)
- AOM-1 has higher 4K max frame rate (60 fps vs 30 fps)
- BOM-5 Mark II has lower Weight (417 g vs 599 g)
Key specs at a glance
Size and weight, to scale
OM-1
135 × 92 × 73 mm
599 g (1.32 lb / 21.13 oz)
OM-5 Mark II
125 × 85 × 52 mm
417 g (0.92 lb / 14.71 oz)
OM-1 is 10mm wider, 6mm taller, and 21mm thicker than OM-5 Mark II.
OM-1 is 182 g heavier than OM-5 Mark II.
Depth (front-to-back): 73mm OM-1 · 52mm OM-5 Mark II
Sensor size, to scale
OM-1
17.4 × 13 mm · Compact / large-type
226 mm² area
OM-5 Mark II
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
OM-1
✓ more lensesMicro Four Thirds
130+
native lenses available
OM-5 Mark II
✓ 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-1
Dimensions (W×H×D mm)
Adds 134.8, 91.6, 72.7
AF points / zones
1053 vs 121 — higher is better
Burst (electronic)
120 fps vs 30 fps — higher is better
EVF resolution
5,760,000 vs 2,360,000 — higher is better
4K max frame rate
60 fps vs 30 fps — higher is better
IBIS effectiveness
8 stops vs 6.5 stops — higher is better
Reasons to choose
OM-5 Mark II
Dimensions (W×H×D mm)
Adds 125.3, 85.2, 52
Weight
417 g vs 599 g — lower is better
Battery life (CIPA)
640 shots vs 520 shots — higher is better
Both cameras share
- ✓Resolution — Both 20.4 MP
- ✓ISO min (native) — Both 80
- ✓ISO max (native) — Both 102,400
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-1
Pros
- ✓50fps burst
- ✓Great weather sealing
- ✓Computational modes
Cons
- –MFT sensor
- –Superseded by OM-1 II
- –Smaller than FF
OM-5 Mark II
Pros
- ✓Compact weather-sealed body
- ✓7.5-stop Sync IS
- ✓30fps burst
- ✓4K vertical video
Cons
- –20MP non-stacked sensor
- –Single card slot
- –Smaller EVF than OM-1
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, OM-1 or OM-5 Mark II?
OM-1 scores 8.5/10 versus 6.5/10 for OM-5 Mark II — 120fps burst — pro-level action capture.
What's the resolution difference between the OM-1 and OM-5 Mark II?
Both cameras share the same 20.4 MP resolution.
Do the OM-1 and OM-5 Mark II have in-body image stabilization?
OM-1 has 8-stop in-body image stabilization, while oM-5 Mark II has 6.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-1 or the OM-5 Mark II?
OM-1 reaches 120 fps electronic. OM-5 Mark II reaches 30 fps electronic.
What's the weight difference between the OM-1 and OM-5 Mark II?
OM-1 weighs 599 g and OM-5 Mark II weighs 417 g, so the OM-5 Mark II is 182 g lighter.
Do the OM-1 and OM-5 Mark II record 4K video?
OM-1: 4K up to 60p. OM-5 Mark II: 4K up to 30p.
Are the OM-1 and OM-5 Mark II weather sealed?
OM-1: Yes. OM-5 Mark II: Yes.
Which has better battery life?
Rated battery life is 520 shots (CIPA) for the OM-1 and 640 shots for the OM-5 Mark II, giving the OM-5 Mark II the edge.
How much does each cost?
OM-1 launched at $2,199 and OM-5 Mark II at $1,199. The OM-5 Mark II is $1,000 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.