The Leica Correction Lenses offer the most favorable eye to camera matching that even photographers having slight eyesight deficiencies can focus accurately. These Diopter Correction Lenses enables you to comfortably compose images in the viewfinder. It offers better and comfortable focusing than when done with the eyeglasses.

• The Leica Correction Lens is obtainable in plus/minus 0.5, 1, 1.5, 2 and 3 grade diopters
• The viewfinder of Leica M comes can be preset by default to -0.5 diopters that if you wear 1 diopter strength glasses, you would need a +1.5 diopter Leica Correction Lens
  

Although the combined viewfinder/rangefinder of the Leica M even helps photographers with minor eyesight deficiencies to focus precisely, optimum eye-to-camera matching is the best alternative. The M system correction lenses provide this, and they also make composing images in the viewfinder more comfortable than it can be with eyeglasses. These lenses are available in grades of plus/minus 0.5, 1, 1.5, 2 and 3 diopters. Prior to ordering, it should be noted that the Leica M's viewfinder is preset by default to -0.5 diopters. So anyone wearing glasses of 1 diopter strength would require a +1.5 diopters M system correction lens.