Sigma Lens Hood for 18-125mm, 24-70mm & 18-200mm Lenses Blocks out extraneous light and reduces internal reflections Protects from fingerprints and scratches Not compatible with all 18-200mm lenses NOT Compatible with the following 18-200mm Lenses: 18-200mm F3.5-6.3 DC OS Macro HSM Lens (use LH676-01 instead) Please see Product Description below for a list of ALL compatible lens models