Reasons to choose PowerShot A400
Released in 2004, PowerShot A400 has about 15 mm² of sensor area, 3.1 MP effective resolution, and a 255 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Canon PowerShot A400
vs Concord Eye-Q 3120 AF
VS
Sensor area
15 mm²
PowerShot A40012 mm²
Eye-Q 3120 AF- Area ratio
- 1.26:1
- Absolute difference
- 3 mm²
- Relative difference
- 26.4%
The PowerShot A400 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
PowerShot A400MetricEye-Q 3120 AF
3.1 MPEffective pixels2.1 MP
4.5 × 3.37Sensor4 × 3
2.21 µmPixel pitch2.39 µm
4.89 µm²Pixel area5.71 µm²
20.44 MP/cm²Pixel density17.5 MP/cm²
7.7Crop factor8.65
—Maximum video—
255 gWeight200 g
SD/MMC cardStorageSmartMedia
AA (2) batteries (NiMH recommended)Battery2x AA
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 PowerShot A400 has the larger sensor area. The Eye-Q 3120 AF has the lighter body. The PowerShot A400 has the higher effective resolution. The PowerShot A400 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Eye-Q 3120 AF
Released in 2002, Eye-Q 3120 AF has about 12 mm² of sensor area, 2.1 MP effective resolution, and a 200 g body. Use these values to narrow the field, not as an overall image-quality score.