Neutral Density ND / Polarizer Filter HD Hero, Hero2

(not for the Hero3)

This little gem needs some explaining. Ever seen a GoPro video where the tires are going backwards
www.vimeo.com/8751678 (1:57)

or where you see RC/helicopter blades (see video below) as if they are standing still? Wouldn't it be nice to blur them? All you have to do is cut out some of the light to the lens and you'll get nice realistic blurred propellers, tires, roads, etc. to give you a natural feel. This filter simply goes between the HD Hero camera lens and the underwater housing lens. But wait, there's more. It's also a polarizing filter making the sky deeper blue, removing water reflections and giving more vibrant colors all around. (does not work in our flat lens housing)

elicopter blades with NO ND filter