The Leica M+3.0 Diopter Correction Lens is very helpful for people who have defect in their eyes. The Leica Diopter correction lens enables people with eye defects to take photographs even without using eye glasses.

• These correction lenses alter the focal length of the viewfinder enabling the object to be viewed clearly
• Leica M Series Lenses can be used to alter the diopter strength of the lens depending upon the diopter strength of the eye glasses  
• Default optical power of the viewfinder is usually -0.5 diopters
• Lenses of different optical powers from -0.5 to +3 diopters are available in the Leica M Series Lenses
• These correction lenses offer easy and accurate eye-to-camera matching
  

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.

LEICA CORRECTION LENSES M:

+ 3.0 diopters