Reasons to choose GXR GR Lens A12 28mm F2.5
Released in 2010, GXR GR Lens A12 28mm F2.5 has about 371 mm² of sensor area, 12.3 MP effective resolution, and a 140 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Ricoh GXR GR Lens A12 28mm F2.5
vs Samsung NX20
VS
Sensor area
371 mm²
GXR GR Lens A12 28mm F2.5369 mm²
NX20- Area ratio
- 1:1
- Absolute difference
- 2 mm²
- Relative difference
- 0.4%
The GXR GR Lens A12 28mm F2.5 has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
GXR GR Lens A12 28mm F2.5MetricNX20
12.3 MPEffective pixels20.3 MP
23.6 × 15.7Sensor23.5 × 15.7
5.49 µmPixel pitch4.26 µm
30.12 µm²Pixel area18.17 µm²
3.32 MP/cm²Pixel density5.5 MP/cm²
1.53Crop factor1.53
—Maximum video—
140 gWeight341 g
Internal storageStorageSDHC, SDXC, Secure Digital
Lithium-Ion DB-90 rechargeable battery Li-ion batteryBatteryLithium-Ion BP1310 battery Li-ion battery
Amber marks the value that is generally preferable in this comparison context. It is not an overall camera score.
How to choose between these cameras
The GXR GR Lens A12 28mm F2.5 has the larger sensor area. The GXR GR Lens A12 28mm F2.5 has the lighter body. The NX20 has the higher effective resolution. The NX20 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose NX20
Released in 2012, NX20 has about 369 mm² of sensor area, 20.3 MP effective resolution, and a 341 g body. Use these values to narrow the field, not as an overall image-quality score.