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 Canon PowerShot A420
VS
Sensor area
15 mm²
PowerShot A40017 mm²
PowerShot A420- Area ratio
- 1.14:1
- Absolute difference
- 2 mm²
- Relative difference
- 13.9%
The PowerShot A420 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 A400MetricPowerShot A420
3.1 MPEffective pixels4 MP
4.5 × 3.37Sensor4.8 × 3.6
2.21 µmPixel pitch2.08 µm
4.89 µm²Pixel area4.32 µm²
20.44 MP/cm²Pixel density23.15 MP/cm²
7.7Crop factor7.21
—Maximum video—
255 gWeight192 g
SD/MMC cardStorageMultiMedia, Secure Digital
AA (2) batteries (NiMH recommended)BatteryAA (2) batteries (NiMH recommended)
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 A420 has the larger sensor area. The PowerShot A420 has the lighter body. The PowerShot A420 has the higher effective resolution. The PowerShot A420 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose PowerShot A420
Released in 2006, PowerShot A420 has about 17 mm² of sensor area, 4 MP effective resolution, and a 192 g body. Use these values to narrow the field, not as an overall image-quality score.