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.
Side-by-side comparison
Samsung NX20
vs Sony Alpha DSLR-A390
VS
Sensor area
369 mm²
NX20369 mm²
Alpha DSLR-A390- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The NX20 and Alpha DSLR-A390 have the same sensor area. Compare pixel density, sensor architecture, and release generation to understand likely image-quality differences.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
NX20MetricAlpha DSLR-A390
20.3 MPEffective pixels14.2 MP
23.5 × 15.7Sensor23.5 × 15.7
4.26 µmPixel pitch5.1 µm
18.17 µm²Pixel area25.98 µm²
5.5 MP/cm²Pixel density3.85 MP/cm²
1.53Crop factor1.53
—Maximum video—
341 gWeight549 g
SDHC, SDXC, Secure DigitalStorageSD/ SDHC, Memory Stick Pro Duo
Lithium-Ion BP1310 battery Li-ion batteryBatteryLithium-Ion NP-FH50 rechargeable 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 NX20 and Alpha DSLR-A390 have the same sensor area. The NX20 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 Alpha DSLR-A390
Released in 2010, Alpha DSLR-A390 has about 369 mm² of sensor area, 14.2 MP effective resolution, and a 549 g body. Use these values to narrow the field, not as an overall image-quality score.