Model FM-610C FM-620C FM-810C FM-820C Image Sensor 1/3"SHARP CCD 1/4"SHARP CCD 1/3"SONY CCD 1/4"SONY CCD Pixels PAL:512(H)x582(V) NTSC:512(H)x492(V) Signal PAL/NTSC Horizontal Resolution 420TVL Min Illumination 0.8Lux/F1.2 Lens Mount 3.6mm BLC Auto AGC Auto Electronic Shutter 1/50(1/60)~1/100,000 White Balance Auto S/N Ratio >48dB