OM System
OM-1 II
Flagship MFT with stacked sensor, 120fps, and pro wildlife features.
$2,399
Released Feb 2024
OM System
OM-D E-M5 Mark III
Compact pro MFT with IBIS and weather sealing.
$1,199
Released Oct 2019
OM-1 II is 4.3 years newer.
Wins
OM-1 II
Wins
OM-D E-M5 Mark III
7 categories tied
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TL;DR — Key differences
- AOM-1 II has higher Burst (electronic) (120 fps vs 15 fps)
- AOM-1 II has higher ISO max (native) (102,400 vs 25,600)
- AOM-1 II has higher EVF resolution (5,760,000 vs 2,360,000)
- BOM-D E-M5 Mark III has higher Card slots (2 vs 1)
- AOM-1 II has higher Burst (mechanical) (10 fps vs 6 fps)
Key specs at a glance
Size and weight, to scale
OM-1 II
135 × 92 × 73 mm
599 g (1.32 lb / 21.13 oz)
OM-D E-M5 Mark III
134 × 91 × 72 mm
580 g (1.28 lb / 20.46 oz)
OM-1 II is 1mm wider, 1mm taller, and 1mm thicker than OM-D E-M5 Mark III.
OM-1 II is 19 g heavier than OM-D E-M5 Mark III.
Depth (front-to-back): 73mm OM-1 II · 72mm OM-D E-M5 Mark III
Sensor size, to scale
OM-1 II
17.4 × 13 mm · Compact / large-type
226 mm² area
OM-D E-M5 Mark III
17.3 × 13 mm · Micro Four Thirds
225 mm² area
Lens ecosystem
Native lens selection
OM-1 II
✓ more lensesMicro Four Thirds
130+
native lenses available
OM-D E-M5 Mark III
✓ 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 II
AF low-light limit
-8 EV vs -7 EV — lower is better
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 134.8, 91.6, 72.7
Burst (electronic)
120 fps vs 15 fps — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
EVF resolution
5,760,000 vs 2,360,000 — higher is better
Card types
Adds SD UHS-I
Burst (mechanical)
10 fps vs 6 fps — higher is better
Reasons to choose
OM-D E-M5 Mark III
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 134, 91, 72
AA filter
Only OM-D E-M5 Mark III supports it
Card slots
2 vs 1 — higher is better
Headphone jack (3.5mm)
Only OM-D E-M5 Mark III supports it
Battery life (CIPA)
640 shots vs 520 shots — higher is better
Weight
580 g vs 599 g — lower is better
Both cameras share
- ✓Resolution — Both 20.4 MP
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-1 II
Pros
- ✓120fps stills
- ✓Stacked MFT
- ✓IP53 weather sealing
- ✓Computational features
Cons
- –MFT sensor size
- –Smaller ecosystem
- –Menu complexity
OM-D E-M5 Mark III
Pros
- ✓Compact pro
- ✓Weather sealed
- ✓IBIS
Cons
- –Older
- –MFT
- –Superseded
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, OM-1 II or OM-D E-M5 Mark III?
OM-D E-M5 Mark III scores 8.0/10 versus 6.5/10 for OM-1 II — Bird AF subject recognition.
What's the resolution difference between the OM-1 II and OM-D E-M5 Mark III?
Both cameras share the same 20.4 MP resolution.
Do the OM-1 II and OM-D E-M5 Mark III have in-body image stabilization?
OM-1 II has 8.5-stop in-body image stabilization, while oM-D E-M5 Mark III has 6-stop in-body image stabilization.
Which shoots faster bursts — the OM-1 II or the OM-D E-M5 Mark III?
OM-1 II reaches 120 fps electronic. OM-D E-M5 Mark III reaches 15 fps electronic.
What's the weight difference between the OM-1 II and OM-D E-M5 Mark III?
OM-1 II weighs 599 g and OM-D E-M5 Mark III weighs 580 g, so the OM-D E-M5 Mark III is 19 g lighter.
Do the OM-1 II and OM-D E-M5 Mark III record 4K video?
OM-1 II: 4K up to 60p. OM-D E-M5 Mark III: 4K up to 60p.
Are the OM-1 II and OM-D E-M5 Mark III weather sealed?
OM-1 II: Yes. OM-D E-M5 Mark III: Yes.
Which has better battery life?
Rated battery life is 520 shots (CIPA) for the OM-1 II and 640 shots for the OM-D E-M5 Mark III, giving the OM-D E-M5 Mark III the edge.
How much does each cost?
OM-1 II launched at $2,399 and OM-D E-M5 Mark III at $1,199. The OM-D E-M5 Mark III is $1,200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.