By further enhancing the water tightness of the camera body, Pentax has upgraded the Optio WG2-GPSs underwater performance to 12 meters, for up to two hours of continuous operation. This camera is also designed to be highly shock-resistant, dustproof, cold-resistant, & crushproof. All these features make the Optio WG2-GPS the ideal imaging partner in harsh, demanding shooting conditions. The Optio WG2-GPS comes equipped with the back-illuminated CMOS image sensor, which offers much lower noise even when camera is set to higher sensitivities. With the combination of a top sensitivity of ISO 6400, 16 effective megapixels, & its imaging engine, this model delivers super-high-resolution images.