ערכת אבטחה 4 מצלמות וכרטיס מקליט

image sensor: omnivision cmos 
pixel resolution: ntsc: 510 x 492
horizontal definition: 320 lines 
scan frequency: 60 hz 
minimum illumination: 0 lux 
power: dc 12v / 500ma
 
this type of image sensor is relatively inexpensive and offers a good quality image.  the cost of this system is usually less and the overall system can be very economical.  while cmos sensors excel in the capture of outdoor pictures on sunny days, they suffer in low light conditions. their sensitivity to light is decreased because part of the sensor is covered with circuitry that filters out noise and performs other functions. the amount of space on a sensor devoted to collecting light is called the pixel’s fill factor. the design of cmos cameras creates a much lower fill factor and therefore they are less sensitive.  cmos cameras do have the advantage when it come to power consumption. because there are less components in the camera board, it draws less power and will run longer if used on a battery. for general purpose viewing in good light, they are a good choice.  if there are budgetary constraints, it's possible to get more features in the overall system using cmos cameras