Low light, excellent image – be sure that not all surveillance bullet cameras are the same even if they look the same!
Through varifocal lenses, you have more freedom. Varifocal security cameras have two main options. One will increase the image, while the other will focus on. Focal length and focus is done by hand, using two screws on the camera itself. If you purchase a camera with varifocal lens 2.8 to 12 mm, it means that you can set it to any number from 2.8 to 12 mm. This means that if you need 8 cameras, say, a 10mm one 7 mm, a 3 mm etc, simply purchase 8 varifocal CCTV cameras and set them to the desired focal length during installation.
Infrared Light Source
Contrary to thermal cameras, IR security cameras do not perceive the objects emitted infrared light as heat, but register the objects reflected infrared light with a wavelength of approximately 850 nm. The distance of the night vision of the security cameras with infrared diodes start of 10 m and can reach up to 100 m. The IR function is determined primarily by the number and diameter of the infra-red LEDs located around the lens of the security camera.
Because of the waterproof design, Bullet CCTV cameras are ideal for outdoor installation. Used in the security perimeter of the buildings, parking lots and other open areas.