Tiffen 4 x 4" Ultra Contrast 1/2 Filter Nanuk 904-1009 The Fusion head features a

The Fusion head features a built-in fluid system

General Type Serial extension cable Features Plenum

6" pockets on each side

For Use w/ Combitube

Tiffen 4 x 4" Ultra Contrast 1/2 Filter Nanuk 904-1009 The Fusion head features aUses Ambient Light to Open Shadows Lightens Shadows to Capture More Detail Lowers Contrast Evenly Throughout Geneates No Flare or Halation ColorCore Glass Made in the USA 10 Year Warranty The 4 x 4" Ultra Contrast 1 2 Filter from Tiffen helps to open your shadows byusing the ambient light surrounding the image area as well as the light in the actual image itself.It lowers contrast uniformly throughout, with little or no loss of sharpness within the