Fotodiox Pro 145mm Ultra Slim Neutral Density 1000 (10-Stop) Filter - Multi Coated ND1000 Filter (works with WonderPana 145 & 66 Systems) Calumet Genesis Integrated aperture control tabs for

Integrated aperture control tabs for adjusting the lens aperture

but for under $1

4 in (19 x 19 x 1 cm)

Just clip your GoPro camera into the mount

Fotodiox Pro 145mm Ultra Slim Neutral Density 1000 (10-Stop) Filter - Multi Coated ND1000 Filter (works with WonderPana 145 & 66 Systems) Calumet Genesis Integrated aperture control tabs forDescription Specs Compatibility Notes Product Highlights: Decrease the effective ISO of high speed film and allow it to be used outdoors in bright situations Enables slow shutter speeds to be used to record movement in subjects such as waterfalls or cars Film subjects such as snow, sand or other bright scenes that can cause overexposure Premium grade optical glass filter; high quality, ultra slim, MC ND1000 filter Premium grade anodized aluminum ring;