The Liquid Focus lens is a simple addition to the existing Raspberry Pi camera which allows users to change the camera’s focus from 25mm near focus up to infinity via the Raspberry Pi and a micro-usb cable. A Varioptic Liquid Lens is used to quickly and accurately change the focal length of the lens system. This can be used for autofocus applications and to stitch together infinite depth of field images. To install, simply screw the metal Lens Holder to the existing PiCamera,
Features:
 
                -USB tunable focus from 25mm to infinity
                -Autofocus
                -Swept focus for infinite depth of field process
                - Attaches directly to PiCam
                - Built in Python library of functions