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OM SYSTEM OM-3 vs Ricoh GR IV
The Ricoh GR IV is 29.9 mm narrower, 27.8 mm shorter, 13.1 mm thinner and 234 g lighter than the OM SYSTEM OM-3. The Ricoh GR IV takes up 61 % 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
- $1,700 at Adorama
Ricoh GR IV

- Width × height × depth
- 109.4 × 61.1 × 32.7 mm (4.31 × 2.41 × 1.29 in)
- Weight
- 262 g (9.2 oz)
- Mount
- Fixed lens
- Price
- $1,567 at Adorama
Specifications compared
| OM-3 | GR IV | |
|---|---|---|
| Resolution | 20.4 MP | 26 MP |
| Sensor | Four Thirds | APS-C BSI CMOS (23.3 x 15.5 mm) |
| Stabilization | Sensor-Shift | 5-axis in-body, up to 6 stops |
| ISO | 200–25,600 | 100–204800 |
| Shutter speed | 1/32000–60 s | 1/4000–30 s (electronic 1/16000) |
| Burst | Up to 120 fps | – |
| Video | 4K internal | 1080p 60p |
| Viewfinder | Electronic (OLED) · 2,360,000 Dot · 1.23x | None (optional optical viewfinder) |
| Screen | Articulating 3" Touchscreen LCD | 3.0" 1.04M-dot fixed touch |
| Card slots | Single Slot: SD/SDHC/SDXC (UHS-II) | Internal 53 GB, 1x microSD UHS-I |
| Battery | BLX-1 | DB-120, about 250 shots (CIPA) |
| Dimensions | 139.3 x 88.9 x 45.8 mm | 109.4 x 61.1 x 32.7 mm |
| Weight | 496 g with battery & card | 262 g |
| Autofocus | 1053-point cross-type hybrid AF, subject detection | Hybrid PDAF/contrast AF, face/eye detection |
| Lens | – | 28mm F2.8 (35mm equivalent), built in |
Values that differ are in bold. From the makers' published specifications.
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