Urth 40.5mm Circular ND16 4-Stop Lens Filter Plus+

40.5mm Thread ND16 Filter Plus+

The Urth 40.5mm Circular ND16 4-Stop Lens Filter Plus+ fits lenses with a 40.5mm front thread. It uses German SCHOTT B270 glass with 20 nano-coating layers to cut reflections and resist water, oil and scratches. The ultra-slim rim helps avoid vignetting on wide-angle lenses. A double-threaded design allows stacking or a lens cap.

Landscape and video shooters needing motion blur

Photographers who want slower shutter speeds in bright light for silky water or cloud movement will benefit. Videographers gain wider apertures for shallow depth of field without overexposure. Buyers whose lenses have a different thread size must use a step ring. Those needing variable density or stronger light reduction should consider other filter types.

4-stop density for bright daylight control

The ND16 factor reduces light by 16 times, giving four stops of exposure latitude. This comfortably handles sunny conditions at base ISO with wide apertures like f/1.8 or f/2.8. In extremely harsh midday sun, four stops may not be enough for very long exposures. Stacking with another filter adds density but can increase flare risk.