A lens hood is essential for the elimination of extraneous light and flare,which can seriously deteriorate image contrast and sharpness. It is particularlyimportant when working in the outdoors where sun and bright skies can causeflare in even the finest multi-coated lenses. The Toyo Pro Compendium LensHood works with a wide variety of lens brands and focal lengths, and flexiblyadjusts regardless of the lens position or camera movement used. It alsofeatures a swing-up mount for easy access to shutter controls. Since largeformat cameras accept a wide selection of lenses from many manufacturers,you might need a variety of filter sizes. The Toyo Pro Compendium Lens Hoodprovides an elegant solution with the use of standard gel filter holders,both 3" and 4". Additionally, optional Extension Rods (#180-604)can be used with the built-in mount frame to extend the hood out furtherfor very long lenses.