Tiffen Optical Filters

Tiffen filters are manufactured using a process that entails permanently laminating the filter material in between two pieces of optical glass that are ground flat to tolerances of a ten-thousandth of an inch, then mounting them in precision metal rings.  The process allows control of the color and density of Tiffen filters, and the characteristics of special effects filters with much greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density. When Tiffen filters are ground and polished, the center is unaffected, so color and density remain uniform.