Function ✪ Protect as a Cushion: Work as a cushion around camera's eyepiece,which provide a protection for camera eyepiece ✪The eyecup is made of soft and durable silicone, it allows for more comfortable viewing through the camera's viewfinder. Meanwhile, it can prevent scratching and damage to eyeglasses. ✪the eyecup effectively shields light that may enter the viewfinder and cause flare. It also can be mounted to the viewfinder easily and securely. ✪The eyecup of made of Rubber Coated Plastic. You can even view it with your glasses on Compatible With Canon EOS 90D 80D 70D 60D 50D / 5DMarkII / 6D / 6DMarkII 40D 30D 20D DSLR Camera， NOT fit for 5D3 5D4 D200 7D T4i T1i Camera.