B+W Filter Master Line Graduated 712 GND 0.6 ND 82mm 1107804Connection of sky and earthND Graduated filters are half transparent and offer a graduated ND grey filter effect on the other half. They allow you to selectively balance the contrast between sky and landscape - for example, to bring out clouds impressively. To make it easier for you to work with the filters, they can be rotated in the filter holder. The transition from one side to the other should not draw a visible line across the image. That's why B+W uses a special coating process in the manufacture of these filters, which ensures a smooth transition from the transparent to the ND range and at the same time preserves the sharpness of the image.MASTER Line: -Turnable brass mount for exact horizontal alignment -Precious matte black finish + slim design -Functional coating for easy screw-on and screw-off -Dirt-repellent, scratch-resistant MRC nano coatingFeatures: -712 ND graduated filter -Diameter: 82 mm -Density: ND 0.6 -Stops: 2 -Filter factor: 4 -Transmission: 25 % -Coating: MRC nano -Fine graduation.