Waterproof eyepiece required for use with Think Tank Photo Hydrophobia rain covers.
WHAT FITS:
EP-20Hydrophobia eyepiece fits the Canon 5D MarkIII, 5D MarkIV, 1D MarkIII, 1D MarkIV, 1DX, 7D, 7D MarkII, Olympus E3 and E30
