Bower Professional Collapsible Rubber Lens Hood 58mm Collapses so that you get the exact amount of shading that you require from the sun. Locking Clamp Thread Design so you can mount on an Adapter or Ring and then still rotate the Lens Hood. Lightweight, easy to carry. Protects your Lens and Camera from Accidental Damage Brand New in retail Packaging with a 3 Year Limited Warranty. Look at your lens for the symbol  (usually on the front) the number next to it is the filter thread size.