Model HS800A HS800B Image Sensor 3.6mm(H)x2.7 mm(V),1/4 inch Signal System PAL/NTSC Effective Pixels PAL:752(H)x582(V)NTSC:768(H) x494(V) Horizontal Resolution More than 480TV lines Video Output 1.0 Vp-p 75´Î(BNC) Minimum Illumination 1Lux/F=1.2 Aperture Auto Focus Auto Focus length 4.1-73.8 mm Digital Zoom 18x12 Backlight Compensation ON/OFF switch White Balance Auto tracking white balance S/N Ratio More than 48dB (AGC OFF) Horizontal rotation range Continuous 360 degrees Horizontal speed 0.5-300 degrees/sec Vertical Rotation range 0-90 degrees Vertical speed 0.5-150 degrees/sec Communication interface RS485 Control Vertical,Horizontal,lens zoom,80preset points Horizontal line scan ON/OFF