Designed to fit the Canon 40mm EF f/2.8mm STM Lens .The JJC LH-52 lens hood offer protection from unwanted light entering your lens and causing glare, especially when shooting toward your light source. They also offer a degree of physical protection for your lens against accidental bumps. The ES-52 is a bayonet-mount type lens hood specifically made to fit the Canon EF 40mm f/2.8 STM lens. Specification:-Material: Aluminum Metal-Color: Black-Anti-glare coating of the inner of hood for preventing the glare from getting into camera lens Compatibility:Canon EF 40mm f/2.8 STM Lens