49mm ND Variable

Suitable for either a lens Adapter or any Lens with a 67mm diameter thread. Neutral Density (ND) filters can reduce the intensity of light without appreciably changing its color. Through polarization angle modulation (rotate the filter ring during operation). Can change the luminous flux substantially with freedom, reducing the ND number from 2 to 400! It can easily replace dozens of ND gray filters of all grades. Rotate it to change to any 2-8 stops. In a bright environment to shoot a strong, dynamic screen, e.g., waterfalls, streams, waves, etc. Notice: The Filter size is not based on the camer