Reasons to choose Optio A10
Released in 2006, Optio A10 has about 38 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.
Side-by-side comparison
Pentax Optio A10
vs Pentax Optio M40
VS
Sensor area
38 mm²
Optio A1027 mm²
Optio M40- Area ratio
- 1.39:1
- Absolute difference
- 11 mm²
- Relative difference
- 39%
The Optio A10 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 1 years apart. Consider sensor generation when comparing pixel metrics.
Key specification differences
Optio A10MetricOptio M40
8 MPEffective pixels8 MP
7.11 × 5.33Sensor6.03 × 4.52
2.18 µmPixel pitch1.85 µm
4.74 µm²Pixel area3.41 µm²
21.11 MP/cm²Pixel density29.35 MP/cm²
4.87Crop factor5.74
—Maximum video—
125 gWeight115 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 A10 has the larger sensor area. The Optio M40 has the lighter body. The Optio A10 and Optio M40 have the same effective resolution. The Optio M40 is the newer release. Also consider the lens system and subjects you shoot.
Reasons to choose Optio M40
Released in 2007, Optio M40 has about 27 mm² of sensor area, 8 MP effective resolution, and a 115 g body. Use these values to narrow the field, not as an overall image-quality score.