3D comparison › Cameras compared
Olympus PEN E-P7 vs OM SYSTEM OM-3
The OM SYSTEM OM-3 is 21 mm wider, 20.4 mm taller, 7.7 mm deeper and 159 g heavier than the Olympus PEN E-P7. The Olympus PEN E-P7 takes up 46 % less space (the box around the body, without lens).
See them side by side at real size
Open the 3D comparison →In 3D, from every angle, with the lens of your choice.
Olympus PEN E-P7

- Width × height × depth
- 118.3 × 68.5 × 38.1 mm (4.66 × 2.70 × 1.50 in)
- Weight
- 337 g (11.9 oz)
- Mount
- Micro Four Thirds
- Price
- no recent price
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
Specifications compared
| PEN E-P7 | OM-3 | |
|---|---|---|
| Sensor | Micro Four Thirds | Four Thirds |
| Resolution | 20.3 MP (5184 x 3888) | 20.4 MP |
| Stabilization | Sensor-shift (5-axis) | Sensor-Shift |
| ISO | 200–25,600 (ext. 100) | 200–25,600 |
| Video | 4K 30p | 4K internal |
| Screen | Tilting 3" touchscreen (flips down for selfies) | Articulating 3" Touchscreen LCD |
| Viewfinder | None | Electronic (OLED) · 2,360,000 Dot · 1.23x |
| Battery | BLS-50 | BLX-1 |
| Dimensions | 118.3 x 68.5 x 38.1 mm | 139.3 x 88.9 x 45.8 mm |
| Weight | 337 g with battery & card · 289 g body | 496 g with battery & card |
| Shutter speed | 1/4000–60 s (electronic 1/16000) | 1/32000–60 s |
| Burst | 8.7 fps mechanical, 15 fps electronic | Up to 120 fps |
| Autofocus | 121-point contrast AF, face/eye detection | 1053-point cross-type hybrid AF, subject detection |
| Card slots | 1x SD UHS-II | Single Slot: SD/SDHC/SDXC (UHS-II) |
Values that differ are in bold. From the makers' published specifications.
Can't decide?
Follow both prices and get an e-mail when one drops. Already own one? Tell us, and we e-mail you its firmware updates and news.
Follow the PEN E-P7 Follow the OM-3More comparisons

Olympus PEN E-P7 vs OM SYSTEM PENsize, weight and specs

Olympus PEN E-P7 vs Sony α7C IIsize, weight and specs

Olympus PEN E-P7 vs Canon PowerShot G7 X Mark IIIsize, weight and specs

OM SYSTEM OM-3 vs Nikon Z5 IIsize, weight and specs

OM SYSTEM OM-3 vs Panasonic LUMIX S9size, weight and specs

OM SYSTEM OM-3 vs Sony α7C IIsize, weight and specs