4 x 5.650" Double Fog Filter Ultra Polarizer and is designed to provide

and is designed to provide a polarization effect that is 15 to 20% greater than other Tiffen filters which only provide a linear or circular polarization effect and are not UltraPol filters

The kit includes a Tiffen Circular Polarizer

which run diagonally across the filter surface

Alleviating the need to use multiple filters at once

or aerial photography

4 x 5.650" Double Fog Filter Ultra Polarizer and is designed to provideThe Tiffen 4 x 5. 650" Double Fog Filter simulates the effects of natural fog or mist by creating a soft glow around highlights and lowering the overall contrast of the scene. When compared to the standard Fog filter, this filter places greater emphasis on lowering the contrast while maintaining sharpness and minimizing the effects of flare. The 1 4 density provides more fog effect that the 1 8, but less than the 1 2, and requires no exposure