Hoodmans glasses model hoodeye eyecup for sony alpha a7 a7r a7s and a7 ii models will help block out light when looking through your cameras viewfinder and is specially designed for the eyeglass wearer from its over sized design which seals out ambient light to its rotating nature that accommodates right or left eyed shooters this eyecup ensures that the sony alpha a7 a7r a7s and a7 ii shooter can get their shot with ease the self locking mount slides over the eyepiece mounting rail