Reasons to choose GX-20
Released in 2008, GX-20 has about 365 mm² of sensor area, 14.6 MP effective resolution, and a 790 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Samsung GX-20
vs Sony Alpha NEX-3
VS
Sensor area
365 mm²
GX-20365 mm²
Alpha NEX-3- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The GX-20 and Alpha NEX-3 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
GX-20MetricAlpha NEX-3
14.6 MPEffective pixels14.2 MP
23.4 × 15.6Sensor23.4 × 15.6
5 µmPixel pitch5.07 µm
25 µm²Pixel area25.71 µm²
4 MP/cm²Pixel density3.89 MP/cm²
1.54Crop factor1.54
—Maximum video—
790 gWeight297 g
SDHC, Secure DigitalStorageSD/ SDHC/SDXC, Memory Stick Pro Duo/ Pro-HG Duo
Lithium-Ion rechargeable (SLB-1137D) Li-ion batteryBatteryLithium-Ion NP-FW50 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 GX-20 and Alpha NEX-3 have the same sensor area. The Alpha NEX-3 has the lighter body. The GX-20 has the higher effective resolution. The Alpha NEX-3 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Alpha NEX-3
Released in 2010, Alpha NEX-3 has about 365 mm² of sensor area, 14.2 MP effective resolution, and a 297 g body. Use these values to narrow the field, not as an overall image-quality score.