... , synchronization, automatic white balance 20M Waterproof Camera 1. Features:SG- 215 : 1/4" Color Sharp CCD, 0Lux/F1.2 ... view distance 30-50m, with 8mm lensSG-115: 1/3" Color Sony CCD, 0Lux/F1.2, 420TVL ... distance 30-50m, with 8mm lens SG-145: 1/3" Color Sony CCD, 0Lux/F1.2, 540TVL ... V)Signal SystemPAL/NTSCLens8mmWhite BalanceAutoElectronic Shutter1/50(1/60)~1/100,000 secSync SystemInternalS/N Ratio>48dB> ...