Model BS-125A BS-125F BS-125I Pickup device 1/3-inch Sony CCD 1/4-inch Sony CCD 1/4-inch Sharp CCD Number of pixels PAL:512(H) X 582(V)        NTSC:512(H) X 492(V) System of signal PAL/NTSC Horizontal resolution 420TV Lines Minimum illumination 1.0Lux/F1.2 Lens mount Built-in 3.7(Pinhole) 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 -20~50(Centigrade) Sync system Internal Video output 1.0v p-p /75 ohm IR view distance 15-20m Power consumption DC12V,<= 120mA Dimension(mm) 49(L) x 29(W) x 54(H) Weight(g) 68(g)