B+W 82mm BASIC Graduated Neutral Density 702M (25%, 2 stop) Filter, darkens the subject area by two f-stops without changing its color. Ideal for Landscape Photography, the 702M is finely polished glass and lasts longer than easily scratchable plastic substrates. It is used on well drawn clouds and will create a strong tone instead of a milky tone, and can create landscapes with high contrast without loss of detail. It has a rotatable mount for precise horizontal alignment.