Features: Improved Comfort: The viewfinder eyecup provides a soft, padded barrier between your eye and the camera's viewfinder, reducing pressure and discomfort during extended shooting sessions. It helps to distribute weight evenly, preventing eye fatigue and allowing for more comfortable framing and focusing. Enhanced Light Blocking: By shading the area around the viewfinder, the eyecup effectively blocks out unwanted ambient light that can interfere with your vision. This allows for better contrast and clarity, especially in bright environments, making it easier to see the subject and compose your shot accurately. Reduced Glare & Reflections: The eyecup also minimizes glare and reflections from external light sources that might bounce off your glasses or directly into the viewfinder. This not only improves visibility but also enhances the overall quality of your compositional experience, enabling you to capture the image you envision with greater precision. Specifications: Material: Rubber Color: black Diameter: 19mm Compatible model: For Nikon FM3A, for Nikon FM2, for Nikon FE2, for Nikon F3, for Nikon F3AF, for Nikon FM Package Contents: 1 x Blindfold