AquaTech Large Soft Collapsing Lens Hood for 400mm f/2.8, 600mm f/4 Lenses & 800mm f/5.6 Light and collapsible and very difficult to damage, is a practical alternative to the originally-supplied metal or carbon fibre hoods that you find with the enormous telephoto lenses for DSLR cameras This particular model fits lenses from600mm f/4 and 400mm f/2.8 lenses and the larger 800mm f/5.6. The Soft Hood comes with a pair of compression straps to perfectly affix the Soft Hood to the outer diameter of your lens barrel no matter the maker. Resistant to moisture and abrasion Packs down small when not in use for ease of transportation