3D comparison › Cameras compared
OM SYSTEM OM-3 vs OM SYSTEM PEN
The OM SYSTEM PEN is 13.5 mm narrower, 14.4 mm shorter, 2.5 mm thinner and 103 g lighter than the OM SYSTEM OM-3. The OM SYSTEM PEN takes up 28 % less space (the box around the body, without lens).
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OM SYSTEM OM-3

- Width × height × depth
- 139.3 × 88.9 × 45.8 mm (5.48 × 3.50 × 1.80 in)
- Weight
- 496 g (17.5 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-3 | PEN | |
|---|---|---|
| Resolution | 20.4 MP | 20.4 MP |
| Sensor | Four Thirds | Four Thirds |
| Stabilization | Sensor-Shift | Sensor-Shift |
| ISO | 200–25,600 | Base: 100* |
| Shutter speed | 1/32000–60 s | 1/4000–60 s |
| Burst | Up to 120 fps | Up to 30 fps |
| Video | 4K internal | 4K internal |
| Viewfinder | Electronic (OLED) · 2,360,000 Dot · 1.23x | Electronic (OLED) · 2,360,000 Dot · 1.1x |
| Screen | Articulating 3" Touchscreen LCD | Articulating 3" Touchscreen LCD |
| Card slots | Single Slot: SD/SDHC/SDXC (UHS-II) | Single Slot: SD/SDHC/SDXC (UHS-I) |
| Battery | BLX-1 | BLS-7 |
| Dimensions | 139.3 x 88.9 x 45.8 mm | 125.8 x 74.5 x 43.3 mm |
| Weight | 496 g with battery & card | 393 g with battery & card |
| Autofocus | 1053-point cross-type hybrid AF, subject detection | 121-point cross-type hybrid AF, human/pet detection |
Values that differ are in bold. From the makers' published specifications.
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