Reasons to choose Optio RZ18
Released in 2011, Optio RZ18 has about 28 mm² of sensor area, 16 MP effective resolution, and a 190 g body. Use these values to narrow the field, not as an overall image-quality score.
Side-by-side comparison
Pentax Optio RZ18
vs Pentax Optio S1
VS
Sensor area
28 mm²
Optio RZ1828 mm²
Optio S1- Area ratio
- 1.03:1
- Absolute difference
- 1 mm²
- Relative difference
- 2.6%
The Optio S1 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 RZ18MetricOptio S1
16 MPEffective pixels14.1 MP
6.08 × 4.56Sensor6.16 × 4.62
1.32 µmPixel pitch1.42 µm
1.73 µm²Pixel area2.02 µm²
57.71 MP/cm²Pixel density49.54 MP/cm²
5.69Crop factor5.62
—Maximum video—
190 gWeight126 g
SDHC, SDXC, Secure DigitalStorageSDHC, SDXC, Secure Digital
Lithium-Ion D-LI92 rechargeable battery Li-ion batteryBatteryLithium-Ion D-LI92 rechargeable battery 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 S1 has the larger sensor area. The Optio S1 has the lighter body. The Optio RZ18 has the higher effective resolution. The Optio RZ18 and Optio S1 were both released in 2011. Also consider the lens system and subjects you shoot.
Reasons to choose Optio S1
Released in 2011, Optio S1 has about 28 mm² of sensor area, 14.1 MP effective resolution, and a 126 g body. Use these values to narrow the field, not as an overall image-quality score.