Lenses in these cameras are either of a full opened lens or pinhole in which the opening of the lens is very small. Pinhole lens cameras are often called "spy" cameras and are most often used in making hidden cameras. All of our hidden cameras are examples of hidden board cameras.
Lenses in board cameras are pre-mounted and have a fixed iris. In most cases they have a short focal length (the distance between the surface of the lens and it's focal point) which results in a wide angle of view. Our board cameras have a lens between 3.6 and 3.7mm.
Because board cameras have some many fixed features they are limited to what they can be used for. However, they offer a low cost solution to security needs especially hidden camera situations.