6.6 x 6.6" Double Fog Filter Density:1 This filter features a single

This filter features a single series of etched lines spaced apart from each other

The 1 density provides less contrast adjustment than the 2 density

2 Neutral Density

Potential near-infrared or infrared color shifts are prevented or minimized

The bag has YKK double-pull zippers

6.6 x 6.6" Double Fog Filter Density:1 This filter features a singleThe 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.