Why we need it: In case you?re disappointed with the fixed official cameras and want precise control of what gets into the frame of your image - like how wide and how close it is - we selected, tested and labeled a bunch of lenses and shrinks it all into a complete toolbox on your palm | What?s in it: This kit includes 10 M12 Lenses to cover almost any angles of view you?ll ever need, 10°/20°/40°/60°/80°/100°/120°/140°/160°/200° respectively on a 1/4? Pi Camera like OV5647 and IMX219. M12 lens holders, screws, specifications and even cleaning cloth are also in the box | What else is needed: It makes a perfect combo with ?Arducam B0031?, a more flexible and slightly larger camera module for Raspberry Pi that uses M12 lenses to frame up the best image. You can?t use this kit directly with the official Raspberry Pi Camera Module V2 because an M12 holder or 18/20mm hole spacing of the camera board is required | NOTE: The 4 lens holders included come with 18mm/20mm hole spacing and 7mm/13mm heights. Typically lenses with a larger Field of View will require shorter holders, and that means you need to change the lens holder if the lens does not focus at all. Arducam CS Mount Cameras also work with this kit with holders replaced