Vello Fit Lenses with 77mm Filter Thread, Designed for Internal Focus Lenses, For Lens Above 20mm (Full Frame Cameras), For Lens Above 15mm (APS-C Size Cameras), Reversible for Compact Storage on Lens, Accepts Lens Caps, Petal Shape Maximizes Hood Coverage, Minimum Weight & Hood ...Vello Fit Lenses with 77mm Filter Thread, Designed for Internal Focus Lenses, For Lens Above 20mm (Full Frame Cameras), For Lens Above 15mm (APS-C Size Cameras), Reversible for Compact Storage on Lens, Accepts Lens Caps, Petal Shape Maximizes Hood Coverage, Minimum Weight & Hood Area, Extra Protection for Accidental Impact, The Vello 77mm Snap-on Tulip Lens Hood (Version II) is designed to fit lenses with a 77mm filter thread. The hood is designed for use with internal focus type zoom lenses. When used with full frame sensor cameras the starting focal length should be above 20mm.
With APS-C sensor cameras the starting focal length should be above 15mm. With wider lenses especially on full frame cameras some slight vignetting might occur. The petal shape of this lens hood maximizes the amount of hood coverage with the minimum amount of weight and hood area.
In addition the design of this hood allows it to be reversed and stored on the lens when not in use. It is also designed to accept lens caps. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens.
In addition since the end of the lens is extended you also get the added benefit of some extra protection from accidental impact., LHS-77II LHS77II