Urth 75x85mm Square ND1000 10-Stop Lens Filter Plus+

75x85mm Square ND1000 Filter

This 75x85mm square neutral density filter delivers a fixed 10 f-stop reduction for long exposure photography. It uses German B270 SCHOTT optical glass with 20 layers of nano-coating. The coating provides a consistent transmission curve for accurate light reduction and protects against water, oil, and scratches. It is designed for photographers needing precise exposure control in bright conditions.

Upgrading from lighter ND filters

Photographers moving up from lower density filters gain the ability to use much slower shutter speeds or wider apertures in harsh daylight. The 10-stop density enables silky motion blur in water or clouds that lighter filters cannot achieve. It also allows shallow depth of field portraits without overexposure in strong sun. The jump is worth it when creative goals demand extreme light reduction beyond standard ND filters.

Square filter system constraints

This filter requires a compatible square filter holder system that accepts 75x85mm glass. It does not screw directly onto a lens thread like circular filters. Vignetting can occur at wide focal lengths depending on the holder design and lens hood used. The fixed 10-stop density cannot be adjusted for changing light conditions. Buyers needing variable density or direct lens mounting should consider other filter types.