The Anti-Fog Eyepiece Eg fits various Canon DSLR cameras and uses specially treated advanced-process glass that prevents condensation or fogging. It is designed for use in warm, humid, or cold weather conditions; when fogging is most likely to occur.
Compatibility
Canon EOS-1D X, 1D Mark IV, 5DS, 5DS R, 5D Mark IV, 5D Mark III, 7D Mark II, 7D, 70D