SAVEoN Professional 77mm Reversible Lens Hood For Canon & Nikon 10-24mm 12-24mm 17-55mm 24mm 16-35mm 17-35mm 24-70mm 24-120mm Offers full rotation to adopt ultimate shade protection, while preserving a secure hold onto your lens Locking clamp thread allows rotation even with the mounting of adaptor rings and filters Reversible hood shortens lens length when not in use Protects lens from scratches, aligns, and dents