OM System
OM-1
First OM System flagship with cross-type AF and 50fps burst.
$2,199
Released Feb 2022
OM System
OM-D E-M1 Mark II
Pro MFT body with 60fps stills and rugged build before the OM-1 era.
$1,699
Released Nov 2016
OM-1 is 5.3 years newer.
Wins
OM-1
Wins
OM-D E-M1 Mark II
7 categories tied
Check current prices
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TL;DR — Key differences
- AOM-1 has higher Burst (electronic) (120 fps vs 20 fps)
- AOM-1 has higher ISO max (native) (102,400 vs 25,600)
- BOM-D E-M1 Mark II has higher Card slots (2 vs 1)
- AOM-1 has higher EVF resolution (5,760,000 vs 3,690,000)
- AOM-1 has lower ISO min (native) (80 vs 100)
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-D E-M1 Mark II
134 × 91 × 72 mm
580 g (1.28 lb / 20.46 oz)
OM-1 is 1mm wider, 1mm taller, and 1mm thicker than OM-D E-M1 Mark II.
OM-1 is 19 g heavier than OM-D E-M1 Mark II.
Depth (front-to-back): 73mm OM-1 · 72mm OM-D E-M1 Mark II
Sensor size, to scale
OM-1
17.4 × 13 mm · Compact / large-type
226 mm² area
OM-D E-M1 Mark II
17.3 × 13 mm · Micro Four Thirds
225 mm² area
Lens ecosystem
Native lens selection
OM-1
✓ more lensesMicro Four Thirds
130+
native lenses available
OM-D E-M1 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
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 20 fps — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
Card types
Adds SD UHS-I
EVF resolution
5,760,000 vs 3,690,000 — higher is better
Codecs
Adds MOV
Reasons to choose
OM-D E-M1 Mark II
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 134, 91, 72
AA filter
Only OM-D E-M1 Mark II supports it
Card slots
2 vs 1 — higher is better
Headphone jack (3.5mm)
Only OM-D E-M1 Mark II 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
Pros
- ✓50fps burst
- ✓Great weather sealing
- ✓Computational modes
Cons
- –MFT sensor
- –Superseded by OM-1 II
- –Smaller than FF
OM-D E-M1 Mark II
Pros
- ✓60fps stills
- ✓Pro build
- ✓Great wildlife MFT
Cons
- –Superseded
- –20MP
- –MFT sensor
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, OM-1 or OM-D E-M1 Mark II?
OM-D E-M1 Mark II scores 9.0/10 versus 6.5/10 for OM-1 — 20fps burst captures fleeting moments.
What's the resolution difference between the OM-1 and OM-D E-M1 Mark II?
Both cameras share the same 20.4 MP resolution.
Do the OM-1 and OM-D E-M1 Mark II have in-body image stabilization?
OM-1 has 8-stop in-body image stabilization, while oM-D E-M1 Mark II has 7-stop in-body image stabilization.
Which shoots faster bursts — the OM-1 or the OM-D E-M1 Mark II?
OM-1 reaches 120 fps electronic. OM-D E-M1 Mark II reaches 20 fps electronic.
What's the weight difference between the OM-1 and OM-D E-M1 Mark II?
OM-1 weighs 599 g and OM-D E-M1 Mark II weighs 580 g, so the OM-D E-M1 Mark II is 19 g lighter.
Do the OM-1 and OM-D E-M1 Mark II record 4K video?
OM-1: 4K up to 60p. OM-D E-M1 Mark II: 4K up to 60p.
Are the OM-1 and OM-D E-M1 Mark II weather sealed?
OM-1: Yes. OM-D E-M1 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-D E-M1 Mark II, giving the OM-D E-M1 Mark II the edge.
How much does each cost?
OM-1 launched at $2,199 and OM-D E-M1 Mark II at $1,699. The OM-D E-M1 Mark II is $500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.