Reasons to choose Optio E40
Released in 2007, Optio E40 has about 25 mm² of sensor area, 8.1 MP effective resolution, and a 130 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax Optio E40
vs Pentax Optio M40
VS
Sensor area
25 mm²
Optio E4027 mm²
Optio M40- Area ratio
- 1.1:1
- Absolute difference
- 2 mm²
- Relative difference
- 9.7%
The Optio M40 has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
Key specification differences
Optio E40MetricOptio M40
8.1 MPEffective pixels8 MP
5.75 × 4.32Sensor6.03 × 4.52
1.75 µmPixel pitch1.85 µm
3.07 µm²Pixel area3.41 µm²
32.61 MP/cm²Pixel density29.35 MP/cm²
6.02Crop factor5.74
—Maximum video—
130 gWeight115 g
SDHC, Secure DigitalStorageSDHC, Secure Digital
AA (2) batteries (NiMH recommended)BatteryLithium-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 M40 has the larger sensor area. The Optio M40 has the lighter body. The Optio E40 has the higher effective resolution. The Optio E40 and Optio M40 were both released in 2007. 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.