The HD-43 Lens Hood from 7artisans Photoelectric is specifically designed to not cause any vignetting in the corners of the image on the 35mm f/1.2 and 35mm f/2 lenses. The hood prevents lens flare and blocks stray light from entering the lens. Additionally, it protects the lens from any sudden impacts and, with its 43mm thread, screws onto the front of the lens.