1. The eyecup works as a cushioning around the camera's eyepiece which provides a protection for the camera's eyepiece.
2. No matter you wear eyeglass or not the hollow rubber of the eyecup is comfortable for your eyelid contact and your glasses.
3. Plastic with rubber it impress you a comfortable feeling following a pleasant experie
4. Compatible with Nikon D5 / D4s / D4 / D500 / D810A / D810 / D800 / D3X / D3 / D3s / D700 / D2Xs / D2X / D2H / F6.