Image Device 1/4" Sharp CCD sensor Vari-focus manually. CMOS, 1/3" Sharp CCD, 1/3" SONY CCD: optional Horizontal 420 TV Lines 480, 550 TVL optional Scanning Frequency PAL: 15,625KHz(H),50Hz(V) Scanning System PAL:625 lines 2:1 interlace Effective Pixels PAL:512(H) x 582(V) Electronic Shutter P:1/50-1/100,000sec (Auto) White-balance Auto white balance (2500°K~9500°K) Synchronizing Internal System Sensitivity 0.2 Lux , 0 Lux at IR on / F2.0 BLC Auto Signal to Noise More than 48dB AGC off Gamma Correction 0.45