The number engraved on the lens is the final diopter in conjunction with OM body and is listed on the left. The initial (actual) diopter of each Dioptric Correction Lens is listed on the right. That is also the value of corrective glasses to which it corresponds. +2 +4 +1 +3 0 +2 -1 +1 -2 0 -3 -1 -4 -2 -5 -3 Thanks to “Branko Gjuro Turk” NOTE: David Lazaroff reports that the above table was less than useful in his case. After extensive experimentation with Dioptric Correction Lens 2 lenses, he came to the following conclusions: I received the nominal 0 (zero) and +1 versions of Olympus Dioptric Lens 2 yesterday afternoon and measured their powers this morning. I also remeasured the power of the nominal -1 lens lens I’d received earlier. The powers are exactly as in the “working hypothesis” I described to you earlier: nominal actual (diopters) +1 +1.7 diopter 0 +0.7 -1 -0.3 I haven’t been able to test other lenses in the Dioptric Correction Lens 2 series, but I thi
