Canon Finder Diopter EG -2.0 with Rubber Frame, for the EOS 1D and 1Ds Mark III by Canon. $34.95. Canon Dioptric Adjustment Lenses provide near or far-sighted users a clear viewfinder image without the use of eyeglasses. The Dioptric Adjustment lens fits into the eyepiece holder of the camera.. Save 22% Off!
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