Urth 40.5mm Variable ND64-1000 6-10 Stop Camera Filter Plus+

40.5mm Variable ND Filter for Bright Light

This 40.5mm circular filter provides 6 to 10 stops of light reduction for lenses with matching thread size. It suits photographers who need flexible exposure control in strong daylight without carrying multiple fixed-density filters. The variable design lets you dial the exact density required for each scene.

Mechanical Limits of the 40.5mm Thread

The filter fits only lenses with a 40.5mm front thread, so it cannot be used on larger or smaller diameters without a step ring. Its ultra-slim rim is engineered to avoid vignetting on wide-angle optics, but stacking additional filters may still cause corner darkening at the widest focal lengths. The double-threaded front accepts a cap or another 40.5mm filter.

6 to 10 Stop Density Range Decides Suitability

The adjustable 6 to 10 stop range is the single specification that determines whether this filter matches your creative needs. It enables long exposures and wide apertures in bright conditions where a 2 to 5 stop filter would be insufficient. Buyers who require lighter reduction for overcast days or darker reduction for solar work should choose a different density range.