Vello ET-65B Dedicated Lens Hood Watson P-1530 The Center column has a

The Center column has a ballast hook for adding a counterweight

Release lever with integrated safety trigger

Key blockers let you hide unused keys to make your own customized control panel

Surface mount 3-way switch

Vello ET-65B Dedicated Lens Hood Watson P-1530 The Center column has aFor Canon 70 300mm f 4. 5 5. 6 DO IS & f 4 5. 6 IS USM Lenses The dedicated Vello ET 65B Lens Hood is specifically designed for use with Canon's 70 300mm f 4. 5 5. 6 DO IS and f 4 5. 6 IS USM lenses. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. A dedicated lens hood is designed to perfectly match the specific focal length of the lens it was designed for.