K&F Concept ND3-ND1000 49mm

The K&F Concept ND3-ND1000 49mm is a variable neutral density filter from the D series that cuts the light reaching the lens by 1.5 to 10 stops. That range allows slow shutter speeds in daylight, for example silky water in waterfalls or emptying a street of people. Clean the filter with a microfibre cloth before storing it and keep it in its case, since the coating layers are the most delicate part. On very fast lenses used wide open, the filter can soften the corners slightly.

The filter measures 49mm across and carries 24 layers of multi-coating, with a Nano-Dazzle finish the brand presents as water and oil repellent and scratch resistant. The rotating ring adjusts density without swapping filters, and the frame is slim to reduce vignetting on wide lenses.

Because it is variable, turn it to the density you want and check exposure before shooting: at the ends of the range a density cross can appear on some lenses. For video it is practical because it lets you adjust light without touching ISO or aperture, keeping the depth of field you chose.

The K&F Concept ND3-ND1000 49mm is sold in other sizes and fits lenses with a 49mm thread. It is an option for landscape, long exposure and recording in bright light, with a reference price of 35 dollars at the manufacturer's store.