It provides cushioning around the camera's eyepiece, protects the viewfinder from dust and scratches, and minimizes stray light for a clearer view, especially for eyeglass wearers.
Compatibility: This type of eyecup is compatible with several Canon EOS models, including the 5D Mark III, 5D Mark IV, 7D, 7D Mark II, 1D X, 1D X Mark II, 1D Mark III, 1D Mark IV, 5DS, and 5DS R.