3D comparison › Cameras compared
OM-1 vs OM SYSTEM PEN
The OM SYSTEM PEN is 9 mm narrower, 17.1 mm shorter, 29.4 mm thinner and 206 g lighter than the OM-1. The OM SYSTEM PEN takes up 55 % less space (the box around the body, without lens).
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OM-1

- Width × height × depth
- 134.8 × 91.6 × 72.7 mm (5.31 × 3.61 × 2.86 in)
- Weight
- 599 g (21.1 oz)
- Mount
- Micro Four Thirds
- Price
- no recent price
OM SYSTEM PEN

- Width × height × depth
- 125.8 × 74.5 × 43.3 mm (4.95 × 2.93 × 1.70 in)
- Weight
- 393 g (13.9 oz)
- Mount
- Micro Four Thirds
- Price
- no recent price
Specifications compared
| OM-1 | PEN | |
|---|---|---|
| Sensor | Four Thirds (17.4 x 13.0 mm) stacked BSI Live MOS | Four Thirds |
| Resolution | 20.4 MP | 20.4 MP |
| Stabilization | 5-axis in-body, up to 8 EV steps | Sensor-Shift |
| ISO | 200–102400 (default auto 200–25600; LOW approx. 80) | Base: 100* |
| Burst | 120 fps electronic (S-AF, blackout-free), 50 fps C-AF | Up to 30 fps |
| Video | 4K 60p 10-bit 4:2:0; Full HD 240p | 4K internal |
| Autofocus | 1,053-point cross-type phase detection AF, contrast AF (1,053 points) | 121-point cross-type hybrid AF, human/pet detection |
| Viewfinder | OLED EVF, 5.76M dots, approx. 1.48x–1.65x, 100% coverage | Electronic (OLED) · 2,360,000 Dot · 1.1x |
| Screen | 76 mm (3.0") vari-angle touch, approx. 1.62M dots | Articulating 3" Touchscreen LCD |
| Card slots | 2x SD UHS-II | Single Slot: SD/SDHC/SDXC (UHS-I) |
| Battery | BLX-1 rechargeable (included) | BLS-7 |
| Shutter speed | – | 1/4000–60 s |
| Dimensions | – | 125.8 x 74.5 x 43.3 mm |
| Weight | – | 393 g with battery & card |
Values that differ are in bold. From the makers' published specifications.
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