How To Choose Between Them
Compare the winners above against your own priorities. A lead in one category only matters if you use it.
Camera Comparison
OM System
OM System OM-3 vs Olympus OM-D E-M1 Mark III
Short AnswerOM System OM-3 wins more of the spec-sheet categories, but the right pick depends on what you shoot.
By Jennifer K. Telfer · Updated · 1 Min Read
Camera A
OM System OM-3
- Launch Price
- $1,999
- Announced
- 2025-02
MirrorlessMicro Four Thirds20.4 MPMicro Four Thirds
VS
Camera B
Olympus OM-D E-M1 Mark III
- Launch Price
- $1,800
- Announced
- 2020-02
MirrorlessMicro Four Thirds20.37 MPMicro Four Thirds
Winner By Photographic Discipline
ResolutionOM System OM-3
Continuous ShootingOM System OM-3
Image StabilizationOlympus OM-D E-M1 Mark III
Autofocus PointsOM System OM-3
Battery LifeOM System OM-3
WeightOM System OM-3
Launch PriceOlympus OM-D E-M1 Mark III
Key Technical Performance Deltas
Resolution (MP)
A20.4
B20.37
Electronic Burst (fps)
A120
B60
Stabilization (Stops)
A6.5
B7
Battery (Shots)
A590
B420
Weight (g, Lower Is Lighter)
A496
B580
AF Points
A1053
B121
Form Factor
139.3 × 88.9 × 45.8 mm
134.1 × 90.9 × 68.9 mm
Reasons To Choose Each
Choose OM System OM-3 If…
- Higher resolution (20.4 MP vs 20.37 MP)
- Higher continuous shooting (120 fps vs 60 fps)
- Higher autofocus points (1053 vs 121 )
- Higher battery life (590 shots vs 420 shots)
- Lighter body (496 g vs 580 g)
Choose Olympus OM-D E-M1 Mark III If…
- Higher image stabilization (7 stops vs 6.5 stops)
- Costs less at launch ($1799.99 vs $1999)
Comprehensive Specification Table
| Spec | OM System OM-3 | Olympus OM-D E-M1 Mark III |
|---|---|---|
| Sensor | ||
| Format | Micro Four Thirds | Micro Four Thirds |
| Megapixels | 20.4 MP | 20.37 MP |
| Sensor Type | Stacked BSI CMOS | Live MOS |
| Max Native ISO | 25600 | 25600 |
| Stabilization | 6.5 Stops | 7 Stops |
| Autofocus | ||
| AF Points | 1053 | 121 |
| Low-Light AF | -5.5 EV | — |
| Speed | ||
| Mechanical Burst | 6 fps | 15 fps |
| Electronic Burst | 120 fps | 60 fps |
| Fastest Mechanical Shutter | 1/8000 | 1/8000 |
| Fastest Electronic Shutter | 1/32000 | 1/32000 |
| Viewfinder & Screen | ||
| Viewfinder | EVF | EVF |
| EVF Resolution | 2.36M | 2.36M |
| LCD Size | 3" | 3" |
| LCD Type | Vari-angle | Vari-angle |
| Video | ||
| Best Video | 4K 60p | 4K 30p |
| Internal Color | 10-bit 4:2:0 | — |
| Log Profile | OM-Log400 | OM-Log400 |
| Body | ||
| Weight | 496 g | 580 g |
| Card Slots | 1 | 2 |
| Battery (CIPA) | 590 Shots | 420 Shots |
| Weather Sealed | Yes | Yes |
| Launch Price | 1999 | 1799.99 |
Amber marks the stronger value. Figures are manufacturer specifications.