Bower s HT Series Tulip Lens Hood is used to block the sun or other light source in order to prevent glare and lens flare. The tulip shape prevents the hood from blocking the field of view of the lens and producing vignetting. Flower shaped lens hoods are most often used on zoom lenses as a normal lens hood may block the field of view on some zoom settings. In addition since the end of the lens is extended you also get the added benefit of some extra protection from accidental impact. Features