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 D5000 / D5100 / D3000.