Fotasy Bayonet Lens Hood for Canon EF 50mm f/1.8 STM Lens, replaces Canon ES-68 Replacement for Canon Lens Hood ES-68 Designed to prevent unwanted stray light from entering the lens. Ensures no problems with vignetting or motor functions. Fits Canon EF 50mm f/1.8 STM Lens. (STM version) Pls Note: This hood does not fit Canon EF 50mm f/1.8 II Lens and Canon EF 50mm f/1.8 Lens.