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The Leica Summilux-M 75mm f/1.4 Version 2 (factory code 11810), produced in Canada from 1982 onward, employs a modified Gauss-type optical design with 7 elements in 5 groups. This configuration delivers exceptional correction for spherical aberration at f/1.4 while maintaining compact proportions for the M-system. A relatively rare lens with total production under 5,000 units across both German and Canadian variants, the 11810 is distinguished by its later coatings and black anodized mount. In A- cosmetic condition, it remains a benchmark for available-light portraiture from the Leica M era.