Tronixpro 62mm Pro Series Snap On Lens Cap For Sigma 105mm f/2.8 EX DG OS Macro Lens, Sigma 30mm f/1.4 DC HSM Lens, Sigma 70mm f/2.8 EX DG Macro Autofocus Lens This lens cap protects lens surface from dust & shock during storage. Unique snap on design allows easy installation onto the lens & one-step removal from the lens. It fits directly onto the lens with a double-action spring design. Microfiber Cloth 62mm Snap On Lens Cap