Model FD-836C FD-846C FD-646C Image Sensor 1/3"SONY CCD 1/4"SONY CCD 1/4"SHARP CCD Pixels PAL:512(H)x582(V) NTSC:512(H)x492(V) Signal Format PAL/NTSC Horizontal Resolution 420TVL Min Illumination 1.0Lux/F1.2 1.5Lux/F1.2 Lens 3.8mm-83.6mm BLC Auto AGC Auto Electronic Shutter 1/50(1/60)~1/100,000 Second White Balance Auto S/N Ratio >52dB