Correction Lens -M + 3.0 dpt lens precise focusing is enabled by

precise focusing is enabled by a specially developed drive concept comprising a stepping motor and linear positioning

Furthermore

As is the case with the Leica SF 60 flash unit

the exceptional correction enables all aberrations to be reduced to a minimum level that is negligible in digital photography

Simply choose your favourite look in red

Correction Lens -M + 3.0 dpt lens precise focusing is enabled byLeica Diopter Correction Lenses provide near or far sighted users a clear viewfinder image without the use of eyeglasses. Ten Diopter Correction Lenses are available, from 3 to +3. For the M series. Screws onto viewfinder eyepiece.