The ND Throttle is our lens adapter for mirrorless and DSLR cameras with a built-in varable ND filter. Just spin the blue ring on the adapter to cut the light entering your lens and capture beautiful long exposure photos like this! - #NDThrottle #LakeGeneva #longexposure #water #rock #movement #motionblur #neutraldensityfilter #SonyA7SII #FDlens #lensadapter #Fotodiox #FotodioxPro #longexposurephotography #20secondexposure #CanonFD50mm #seaweed #50mm #primelens #FDtoSony #NDFilter