Maxsimafoto - LCD Pro Glass Screen Protector for Canon 5D MKIII, 5D3. 5D Mk3, 5DR 5DS R. PRO LCD GLASS PROTECTOR FOR 5DmKIII It is rigid and made of optical glass material, which achieves HIGH transmittance (higher than plastic LCD screen protectors). Only 0.5mm thick with 6 layers of coatings and UV Protection. Optical glass strengthened through special crafting process. Prevent scratches, collisions and moderate impact to the LCD screen.