Don"t let anyone tell you it"s impossible to mount filters on a GoPro camera..We took our professional WonderPana filter system, and miniaturized it to fit everyone"s favorite sports camera; the GoPro HERO3. When you bolt the WonderPanaGo onto your GoPro HERO3 case, you"re adding a sturdy all-metal mount for our filter system. Your case remains waterproof and sealed against the elements, and now you can add professional grade standard filters using the Fotodiox Pro Step-Up Ring included in this kit. The WonderPanaGo is the flagship of our exciting new GoTough line of all-metal action camera accessories and mounts. ATTN: HERO3+ USERS: This version of the WonderPana GO system is designed expressly for the original GoPro HERO3 camera housing. The new "slimline" housing included with the HERO3+ is currently NOT compatible with the WonderPana GO filter mount. To use WonderPana GO with the HERO3+ camera, simply attach the filter mount to an original HERO3 waterproof housing, or skeleton housing.