52MM 2X Professional Telephoto Lens With High Definition 52MM Wide Angle Lens + Adapter 52mm For GoPro Hero 3+ Hero4 Black Silver White Camcorder 52mm,made of Aluminum Alloy Allows you to use larger size filters on lenses with a smaller diameter thread. The first number is the size that screws into the lense, the second number is the filter size. THIS PHOTO4LESS KIT INCLUDES 52mm 2X Professional Telephoto Lens - High Definition 52mm Wide Angle Lens - Camera & Lens 3 Piece Cleaning Kit - GoPro Adapter 52mm please note: usage of wide angle or telephoto lens may cause the image to vignette