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.
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Comments about -3 Diopter EG for Canon EOS 1D-MarkIII and EOS IDS-MarkIII:
Found it too difficult to use Live View on a lot of circumstances and needed proper correction to use viewfinder.
Comments about -3 Diopter EG for Canon EOS 1D-MarkIII and EOS IDS-MarkIII:
Excellent product for short sighted photographers, fit on my Canon EOS1Ds Mk3 and allow me to have better focusing without wearing glasses or contact lenses.
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