Mini surveillance cameras

Board cameras are mini cameras that feature a digital lens mounted onto a miniature circuit board. Mini surveillance cameras are usually only one inch by one inch so they are ideally sized for security camera setups where secrecy is important.
Mini surveillance cameras are often the camera of choice for spy surveillance camera system monitoring. Some mini cameras will even utilize pinhole lenses. On average a pinhole lens is a sixteenth of an inch in diameter. This is the only part of the camera that must be exposed in order for a picture to be obtained.
Pinhole lenses come in two varieties – flat or conical.

1. Conical lenses can work with a smaller hole and are often used in security camera systems using ceiling tiles.
2. Flat lenses require a larger hole and are a good choice when your security camera system is to be situated in thin material, like clothing. 

 With their smaller hole size the pinhole lens does have a slightly lower resolution than the board lens. which is typically 1/2 inch in diameter, to allow more light to get in.