Canon EG-3 Dioptric Lens

The technical details behind this dioptric lens
Comfortably view your subject without the use of eyeglasses using the Canon EG-3 Dioptric Lens. This lens is created for Canon camera users who have nearsighted vision. This lens is compatible with EOS 5D Mark III, EOS 5D Mark IV, EOS 5DS R, EOS 5DS, EOS 6D, EOS 7D, EOS 7D Mark II, EOS-1D C, EOS-1D Mark III, EOS-1D Mark IV, EOS-1D X, EOS-1Ds Mark III, and EOS R.
Key Features

For use with select EOS cameras
Ideal for eyeglass wearers
For near-sighted users
Fits into eyepiece holder
Top three reasons we think you will love this dioptric lens

Comfortable shooting without glasses
Convenient to use
Works great