The Tiffen 4 x 5.65" Clear (colorless) Glass Filter is for color as well as black and white films. It also serves as a permanent lens protector. The value of a clear filter covering a lens has been well-documented over the years. How many stories have all heard about photographers dropping lenses and smashing front elements. With a front lens protection filter on, the chances of preserving the valuable glass in your lens increases many fold.