This is the 6mm Wide Angle Lens, an add-on for the Raspberry Pi High Quality Camera. It has a wide field of view and a variety of uses, like CCTV applications, or of course, cat photos. Includes a thumbscrew to quickly and easily assemble onto the HQ Camera Board. 

Wide angle lenses are good for getting shots of a big area, for wildlife cameras, security cameras, doorbell cams, etc. The video may be distorted around the edges to fit it all into the sensor.

For use with the Raspberry Pi High Quality 12MP Camera only. We also carry a 16mm 10MP Telephoto Lens.

Please note this model is "6mm 3MP" but the 3MP does not refer to the megapixels, the HQ camera is still 12 MegaPixels!