The Rodenstock 46mm UV Blocking Digital pro MC Slim Filter is a general use, clear filter that helps to absorb ultraviolet light and reduce the bluish cast of daylight. No additional coloration or contrast is provided, allowing you to pair this filter with others. The UV filter is also useful as a general protective filter to leave on lenses at all times. Filters help to reduce dust and moisture from reaching your lens element and provide additional protection in case of drops or situations where scratching could occur. Rodenstock's Digital pro MC filters feature a hardened, black anodized aluminum slimline filter mount with front filter threads. This allows the attachment of other filters or lens hoods while still maintaining the vignette-reduction capabilities of a slim filter. It is constructed from 16-layer, eight layers on each side, multicoated hardened optical glass.