Canon Dioptric Lens EG -3

For the Canon EOS 1D MkIII and 1Ds MkIII digital SLR cameras, Canon EG Dioptric Lenses provide near and far-sighted users with a clear viewfinder image without wearing spectacles. Canon dioptric lenses only handle simple eyesight defects of long and short sight, they may not help other eyesight problems.

Price: 29.99 from Wex Photo Video