Reasons to choose Optio A20
Released in 2006, Optio A20 has about 25 mm² of sensor area, 10 MP effective resolution, and a 125 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax Optio A20
vs Pentax Optio Z10
VS
Sensor area
25 mm²
Optio A2025 mm²
Optio Z10- Area ratio
- 1:1
- Absolute difference
- 0 mm²
- Relative difference
- 0%
The Optio A20 and Optio Z10 have the same sensor area. Compare pixel density, sensor architecture, and release generation to understand likely image-quality differences.
These cameras were released 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
Optio A20MetricOptio Z10
10 MPEffective pixels8 MP
5.75 × 4.32Sensor5.75 × 4.32
1.58 µmPixel pitch1.76 µm
2.48 µm²Pixel area3.11 µm²
40.26 MP/cm²Pixel density32.21 MP/cm²
6.02Crop factor6.02
—Maximum video—
125 gWeight125 g
Secure DigitalStorageSDHC, Secure Digital
Lithium-Ion rechargeable Li-ion batteryBatteryLithium-Ion rechargeable 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 Optio A20 and Optio Z10 have the same sensor area. The Optio A20 and Optio Z10 have the same body weight. The Optio A20 has the higher effective resolution. The Optio Z10 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Optio Z10
Released in 2007, Optio Z10 has about 25 mm² of sensor area, 8 MP effective resolution, and a 125 g body. Use these values to narrow the field, not as an overall image-quality score.