The term Bullet Camera comes from 
                         its resemblance to a rifle bullet. Generally long and 
                         tapered like a cylinder, it looks like an oversized ammo 
                         cartridge. 
  Most bullet cameras come with a fixed 
                         4mm lens that allows a 70 degree angle of view. This is 
                         the widest angle you can have without distorting the 
                         picture. A 4mm lens will allow you to see facial 
                         features out to about 35 feet. If infrared is included 
                         you can generally see 35 feet minimum with no external 
                         lighting, some can see up to 70 feet. Some devices 
                         capture images in color which is best for daytime 
                         lighting. For nighttime viewing choosing an infrared 
                         camera, which captures images in black and white is 
                         better. Many of the products will display color during 
                         the day and automatically switch to black and white 
                         infrared viewing when light levels are low.  
                         
    |