Sony ALC-SH102 Lens Hood for Sony SAL55200 Lens Helps block unwanted light - Lens hoods are essential when taking pictures where the camera is pointing towards a strong source of light (i.e. the sun, spot lights) Protects the lens - Protects the lens when stood on a surface, in the camera bag, or when changing lenses - also helps to keep fingers away from the front of the lens Compatible - Lens hood for Alpha SAL-55200 lens Dimensions (Approx) - 3 3/8 x 2 1/4 Inches Weight (Approx.) - 1.2oz (34g)