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The Marumi 62 mm ND4. This filter has the same percentage light transmittance as the Tiffen 0.6 (optical density) neutral density filter. A ND4 filter cuts all light by 75%. This forces the Hero3 to slow its shutter speed. An ND filter is often used to reduce or eliminate prop blur for general aviation videography and minimize the "jello effect" experienced in some radio controlled applications. Consider using this filter if you are filming the following sports: High vibration motorsports Multi-rotor RC General aviation SRP.
Tip: If you are experiencing one of the undesirable effects of rolling shutter like prop blur or the "jello" effect then consider having multiple ND filters with you during filming. The ND filter choice you make will be based on the severity of the vibration experienced by the camera and lighting conditions present at the time of filming.
