BenQ M21, 5 MP, CMOS, 25.4 / 2.5 mm (1 / 2.5"), 7.62 cm (3"), LCD, 310 g BenQ M21. Total megapixels: 5 MP, Sensor type: CMOS, Optical sensor size: 25.4 / 2.5 mm (1 / 2.5"). Optical zoom: 5x, Digital zoom: 4x, Focal length range: 6.8 - 34 mm. Compatible memory cards: SD, SDHC, Maximum memory card size: 32 GB. ISO sensitivity: Auto. White balance: Auto, Cloudy, Daylight, Fluorescent, Tungsten