Ideal viewfinder eyecup eyepiece for Olympus OM SYSYEM OM-1 Mark II & OM-1 camera Replaces Olympus EP-18 eyecup Blocks light and helps you concentrate on taking photo Soft silicone material for eye comfort, ease your eye hitting on viewfinder incautiously Protects viewfinder from impact and scratches effectively During shooting, the Eyecup can not only keep your viewfinder safe from impact and scratches but also protect the viewfinder from dirt, moisture, dust, and unwanted light, thus providing more image detail. In addition, it allows more comfortable viewing when camera is held to eye, especially when wearing glasses. And it also protects your glasses from scratches.