Model BS-872D BS-872C BS-872B BS-872A BS-872F BS-872I Pickup device 1/3-inch Sony CCD 1/4-inch Sony CCD 1/4-inch Sharp CCD Number of pixels PAL:752(H) x 582(V) NTSC:768(H) x 492(V) PAL:512(H) X 582(V)NTSC:512(H) x 492(V) System of signal PAL/NTSC Horizontal resolution 520TV Lines 480TV Lines 450TV Lines 420TV Lines Minimum illumination 0Lux/F1.2(IR Open) Lens mount Built-in 25mm (Optional) Backlight compensation Auto Electronic shutter 1/50(1/60)~1/100,000sec AGC Auto White balance Auto S/N Ratio > 48dB Gamma correction > 0.45 Operation temperature -20degree~50degree Sync system Internal Video output 1.0v p-p /75 ohm Power consumption DC12V,<= 1200mA Dimension(mm) 187(L) x 119.6(W) x 118(H) IR view distance 40-80m Weight 1560g