K&F Concept Variable ND filter

This filter replaces your entire collection of ND filters.
By simply turning the filter, its density can be varied from ND2 to ND400.
This filter is particularly recommended for taking pictures of rivers.
It is also useful for video recordings, e.g. if you do not want to increase the shutter speed or close the aperture further.
Features:

• 1 filter that replaces all your ND filters
• Simple adjustment by turning the filter
• no colour change
• ideal for river shots etc.