Description
NiSi JetMag Pro 67MAG Cross Screen 4x Magnetic Filter (67mm) Dry Mounting 4Lens CoatingSuper Multi Layer CoatingAspherical ElementsYesED 4Lens CoatingSuper Multi Layer CoatingAspherical ElementsYesED Glass ElementsOne SLD ElementsFilter Size55mmLens Elements Groups10 Elements 6 GroupsDiaphragm Blades9 (rounded diaphragm)Dimensions66 and the 10 dB option is best when especially loud sources that could distort the recording