Rotating ring between ND2-400 provides great versatility when changing light. Reduces the amount of light affecting color balance. ND filters can eliminate bright and washed-out images. Allows for long shutter speeds to capture the movement of subjects like waterfalls, creating a silky smooth effect. Apply a slow shutter speed in bright sunlight. Simply rotate the filter ring, it offers 2 to 8 stops of extra density. Thin. Fine filters are important to prevent vignetting when shooting at wider angles. Color: black Material: aircraft aluminum + optical glass Size: 49mm Package contents: 1 x ND filter Only the above package content, other products are not included. Note: Light photography and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowed measurement error is +/- 1-3 cm.