77mm True-Match Vari-ND Filter The 77mm True-Match Vari-ND Thread-In is a single low profile filter with both True-Match Polarizing filters in the correct orientation for maximum ease of use and efficiency. The low profile ring prevents vignetting on most DSLR and Video Camera lenses. Step rings are available in common sizes to adapt the 77mm size to smaller lens thread diameters.
Circular True-Pol 4.5 Glass Filter Schneider Circular Polarizers feature a two layer design to prevent this blackout. The first layer is made up of the same polarizing material used in all True-Pol filters; the second layer is a 1/4- wave retarder plate which effectively prevents cross-polarization.
Linear True-Pol 4.5 Glass Filter True-Pol Polarizing filters enable you to achieve a level of optical performance previously unavailable to cinematographers. This is by far the most effective polarizer for motion picture and television cameras. Having an extinction ratio of ER 374, the Schneider True-Pol is 12- times more effective than other polarizing filters, and is unmatched in its ability.