6.6 x 6.6" Double Fog Filter Density:1/8 This Tiffen Adapter Ring is

This Tiffen Adapter Ring is designed to enable the use of a Tiffen Pro100 Series Camera Filter Holder on a lens with front filter threads

2x filter factor that provides exposure reduction

as well as clearer imagery when photographing in hazy conditions

black anodized finish for durability

6.6 x 6.6" Double Fog Filter Density:1/8 This Tiffen Adapter Ring isThe Tiffen 2 x 3" Double Fog 3 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 3 density provides more fog effect that the 2, but less than the 4, and requires no exposure compensation.