Lightweight aluminum components effectively block light and prevent lens reflections and vignetting Square Lens Shade, Fits 37/39/40.5/46/43/49mm Lens Easy to install and remove, provides excellent blackout effect For photography enthusiasts, professional photographers and photography students who need to protect their lenses and improve the quality of their photos Ideal for outdoor shooting under strong light environments, landscape photography, portrait photography and other situations where need to avoid light interference