I'm confused about this. I'm looking at two point and shoot cameras. One is 10MP and has a sensor of 1/1.7. The other is 12MP and has a sensor of 1/2.3. According to this wiki article: http://en.wikipedia.org/wiki/Image_sensor_format, the 1/1.7 sensor is physically larger than the 1/2.3 sensor. Yet, the latter has more megapixels. The 1/1.7 camera has a faster lens; 1.8. It's a 3x zoom. The lens on the 1/2.3 camera is 2.8. It's a 5x zoom. Wide angle in both cases is 28mm. I'm trying to figure out which should give me sharper pictures. I'm thinking that the faster lens and larger sensor should, in principle, be the sharpest.