Wondering how Samsung manages to cram a 16-megapixel camera into seemingly wafer-thin phones like the Galaxy A8? By developing a brand-spanking new sensor that fits, that's how. The Korean company has built an ISOCELL-based CMOS imager that uses extremely tiny 1.0-micron pixels instead of the 1.12-micron units from the previous model. That may not sound like much of a difference, but it amounts to a sensor that's 20 percent thinner, at a scant 5mm (0.2 inches) deep. In short, you won't have to accept an unsightly camera hump just to get high-resolution shots.