Here’s a neutral density (ND) filter with a twist – literally.
The Variable NDX from Kenko delivers a range of ND values from 2.5 to 1000, just by twisting the filter.
The manufacturer says there’s no colour shift when using the filter.
All glass surfaces are multi-coated, there’s an ND value reference ring, and the filter is available in 77 mm or 82 mm sizes with step rings included.
The NDX filter uses a depolarizing plate to help cancel out unwanted polarizing effects. Kenko adds two layers of polarizing film to each filter to eliminate all sources of polarization occurring as light passes through the glass.