The Leica M series lenses are known to improve the camera’s user friendliness and versatility. The Leica diopter correction lenses provide ultimate eye to camera matching for better results. The Leica M’s rangefinder/viewfinder combination helps photographers with minor eye deficiencies to focus precisely.

• The Leica M -3.0 Diopter Correction Lens helps you compose pictures comfortably in the viewfinder than when it is done wearing eyeglasses
• The Leica M Series Lenses can be got in various diopter grades like plus/minus 0.5, 1,1.5, 2, and 3
• Since the viewfinder of Leica M are preset to -0.5 diopters by default, any person wearing glasses need to get +1.5 diopters M system correction lenses
  

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.